---
APC_amount: 6828 EUR
DOAJ_listed: '1'
OA_place: publisher
OA_type: gold
_id: '18444'
abstract:
- lang: eng
text: Animals rely on compensatory actions to maintain stability and navigate their
environment efficiently. These actions depend on global visual motion cues known
as optic-flow. While the optomotor response has been the traditional focus for
studying optic-flow compensation in insects, its simplicity has been insufficient
to determine the role of the intricate optic-flow processing network involved
in visual course control. Here, we reveal a series of course control behaviours
in Drosophila and link them to specific neural circuits. We show that bilateral
electrical coupling of optic-flow-sensitive neurons in the fly’s lobula plate
are required for a proper course control. This electrical interaction works alongside
chemical synapses within the HS-H2 network to control the dynamics and direction
of turning behaviours. Our findings reveal how insects use bilateral motion cues
for navigation, assigning a new functional significance to the HS-H2 network and
suggesting a previously unknown role for gap junctions in non-linear operations.
acknowledged_ssus:
- _id: Bio
- _id: M-Shop
- _id: LifeSc
acknowledgement: We thank Georg Ammer and Alexander Borst for sharing anti-ShakB serum
antibodies. We thank Nélia Varela and Eugenia Chiappe for the w1118;+;10XUAS-IVS-eGFPKir2.1/TM6B
fly line, Augustin Hrvoje for the shakB[2] line, as well as Jesse Isaacman-Beck
and Thomas R Clandinin for the gift of y1,w*;20XUAS-IVS-PhiC31;+ fly line. We also
thank Armel Nicolas and Tomas Masson for the proteomic analysis, Ece Sönmez for
help with fly crosses and dissections for protein analysis, and Lisa Hofer for assistance
with the reconstruction experiments. We would also like to thank Laura Burnett for
drawing scientific illustrations used in the figures. We are particularly grateful
to members of the Siekhaus, the Kondrashov, and the Chiappe group for providing
material support and technical advice. We are grateful to Daria Siekhaus, Eugenia
Chiappe, Alexander Borst, Ben deBivort, and all the members of the Joesch laboratory
for valuable discussions and comments on the manuscript. Stocks from the Bloomington
Drosophila Stock Center (NIH P40OD018537) and the Vienna Drosophila Resource Center
were used in this study. The Scientific Service Units of ISTA supported the project
through resources provided by the Imaging and Optics Facility, MIBA Machine Shop,
and the Lab Support Facility, as well as Vienna Drosophila Research Centre. This
work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)
as part of the SPP 2205 – 429960716 (M.J.).
article_number: '8830'
article_processing_charge: Yes
article_type: original
author:
- first_name: Victoria
full_name: Pokusaeva, Victoria
id: 3184041C-F248-11E8-B48F-1D18A9856A87
last_name: Pokusaeva
orcid: 0000-0001-7660-444X
- first_name: Roshan K
full_name: Satapathy, Roshan K
id: 46046B7A-F248-11E8-B48F-1D18A9856A87
last_name: Satapathy
orcid: 0009-0006-2974-5075
- first_name: Olga
full_name: Symonova, Olga
id: 3C0C7BC6-F248-11E8-B48F-1D18A9856A87
last_name: Symonova
orcid: 0000-0003-2012-9947
- first_name: Maximilian A
full_name: Jösch, Maximilian A
id: 2BD278E6-F248-11E8-B48F-1D18A9856A87
last_name: Jösch
orcid: 0000-0002-3937-1330
citation:
ama: Pokusaeva V, Satapathy RK, Symonova O, Jösch MA. Bilateral interactions of
optic-flow sensitive neurons coordinate course control in flies. Nature Communications.
2024;15. doi:10.1038/s41467-024-53173-w
apa: Pokusaeva, V., Satapathy, R. K., Symonova, O., & Jösch, M. A. (2024). Bilateral
interactions of optic-flow sensitive neurons coordinate course control in flies.
Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-024-53173-w
chicago: Pokusaeva, Victoria, Roshan K Satapathy, Olga Symonova, and Maximilian
A Jösch. “Bilateral Interactions of Optic-Flow Sensitive Neurons Coordinate Course
Control in Flies.” Nature Communications. Springer Nature, 2024. https://doi.org/10.1038/s41467-024-53173-w.
ieee: V. Pokusaeva, R. K. Satapathy, O. Symonova, and M. A. Jösch, “Bilateral interactions
of optic-flow sensitive neurons coordinate course control in flies,” Nature
Communications, vol. 15. Springer Nature, 2024.
ista: Pokusaeva V, Satapathy RK, Symonova O, Jösch MA. 2024. Bilateral interactions
of optic-flow sensitive neurons coordinate course control in flies. Nature Communications.
15, 8830.
mla: Pokusaeva, Victoria, et al. “Bilateral Interactions of Optic-Flow Sensitive
Neurons Coordinate Course Control in Flies.” Nature Communications, vol.
15, 8830, Springer Nature, 2024, doi:10.1038/s41467-024-53173-w.
short: V. Pokusaeva, R.K. Satapathy, O. Symonova, M.A. Jösch, Nature Communications
15 (2024).
corr_author: '1'
date_created: 2024-10-20T22:02:05Z
date_published: 2024-10-12T00:00:00Z
date_updated: 2026-06-10T07:58:34Z
day: '12'
ddc:
- '570'
department:
- _id: MaJö
doi: 10.1038/s41467-024-53173-w
external_id:
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pmid:
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grant_number: '429960716'
name: Evolution of Sensorimotor Transformation Across Diptera
publication: Nature Communications
publication_identifier:
eissn:
- 2041-1723
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publisher: Springer Nature
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title: Bilateral interactions of optic-flow sensitive neurons coordinate course control
in flies
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
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year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '18553'
abstract:
- lang: eng
text: Transcription-coupled nucleotide excision repair (TC-NER) efficiently eliminates
DNA damage that impedes gene transcription by RNA polymerase II (RNA Pol II).
TC-NER is initiated by the recognition of lesion-stalled RNA Pol II by CSB, which
recruits the CRL4CSA ubiquitin ligase and UVSSA. RNA Pol II ubiquitylation at
RPB1-K1268 by CRL4CSA serves as a critical TC-NER checkpoint, governing RNA Pol
II stability and initiating DNA damage excision by TFIIH recruitment. However,
the precise regulatory mechanisms of CRL4CSA activity and TFIIH recruitment remain
elusive. Here, we reveal human serine/threonine-protein kinase 19 (STK19) as a
TC-NER factor, which is essential for correct DNA damage removal and subsequent
transcription restart. Cryogenic electron microscopy (cryo-EM) studies demonstrate
that STK19 is an integral part of the RNA Pol II-TC-NER complex, bridging CSA,
UVSSA, RNA Pol II, and downstream DNA. STK19 stimulates TC-NER complex stability
and CRL4CSA activity, resulting in efficient RNA Pol II ubiquitylation and correct
UVSSA and TFIIH binding. These findings underscore the crucial role of STK19 as
a core TC-NER component.
acknowledged_ssus:
- _id: LifeSc
- _id: PreCl
acknowledgement: We thank N. Thompson and R. Burgess for the 8WG16 hybridoma cell
line. This research was further supported by the Scientific Service Units (SSU)
of IST Austria through resources provided by the Lab Support Facility (LSF) and
the Preclinical Facility (PCF). This work is part of the Oncode Institute, which
is partly financed by the Dutch Cancer Society. Research at the Netherlands Cancer
Institute is supported by institutional grants of the Dutch Cancer Society and the
Dutch Ministry of Health, Welfare and Sport. This study was supported by a VICI
(VI.C.182.025) and a TOP Grant (714.017.003) of the Netherlands Organization for
Scientific Research.
article_processing_charge: No
article_type: original
author:
- first_name: Anisha R.
full_name: Ramadhin, Anisha R.
last_name: Ramadhin
- first_name: Shun-Hsiao
full_name: Lee, Shun-Hsiao
last_name: Lee
- first_name: Di
full_name: Zhou, Di
last_name: Zhou
- first_name: Anita P
full_name: Testa Salmazo, Anita P
id: 41F1F098-F248-11E8-B48F-1D18A9856A87
last_name: Testa Salmazo
- first_name: Camila
full_name: Gonzalo-Hansen, Camila
last_name: Gonzalo-Hansen
- first_name: Marjolein
full_name: van Sluis, Marjolein
last_name: van Sluis
- first_name: Cindy M.A.
full_name: Blom, Cindy M.A.
last_name: Blom
- first_name: Roel C.
full_name: Janssens, Roel C.
last_name: Janssens
- first_name: Anja
full_name: Raams, Anja
last_name: Raams
- first_name: Dick
full_name: Dekkers, Dick
last_name: Dekkers
- first_name: Karel
full_name: Bezstarosti, Karel
last_name: Bezstarosti
- first_name: Dea
full_name: Slade, Dea
last_name: Slade
- first_name: Wim
full_name: Vermeulen, Wim
last_name: Vermeulen
- first_name: Alex
full_name: Pines, Alex
last_name: Pines
- first_name: Jeroen A.A.
full_name: Demmers, Jeroen A.A.
last_name: Demmers
- first_name: Carrie A
full_name: Bernecky, Carrie A
id: 2CB9DFE2-F248-11E8-B48F-1D18A9856A87
last_name: Bernecky
orcid: 0000-0003-0893-7036
- first_name: Titia K.
full_name: Sixma, Titia K.
last_name: Sixma
- first_name: Jurgen A.
full_name: Marteijn, Jurgen A.
last_name: Marteijn
citation:
ama: Ramadhin AR, Lee S-H, Zhou D, et al. STK19 drives transcription-coupled repair
by stimulating repair complex stability, RNA Pol II ubiquitylation, and TFIIH
recruitment. Molecular Cell. 2024;84(24):4740-4757.e12. doi:10.1016/j.molcel.2024.10.030
apa: Ramadhin, A. R., Lee, S.-H., Zhou, D., Testa Salmazo, A. P., Gonzalo-Hansen,
C., van Sluis, M., … Marteijn, J. A. (2024). STK19 drives transcription-coupled
repair by stimulating repair complex stability, RNA Pol II ubiquitylation, and
TFIIH recruitment. Molecular Cell. Elsevier. https://doi.org/10.1016/j.molcel.2024.10.030
chicago: Ramadhin, Anisha R., Shun-Hsiao Lee, Di Zhou, Anita P Testa Salmazo, Camila
Gonzalo-Hansen, Marjolein van Sluis, Cindy M.A. Blom, et al. “STK19 Drives Transcription-Coupled
Repair by Stimulating Repair Complex Stability, RNA Pol II Ubiquitylation, and
TFIIH Recruitment.” Molecular Cell. Elsevier, 2024. https://doi.org/10.1016/j.molcel.2024.10.030.
ieee: A. R. Ramadhin et al., “STK19 drives transcription-coupled repair by
stimulating repair complex stability, RNA Pol II ubiquitylation, and TFIIH recruitment,”
Molecular Cell, vol. 84, no. 24. Elsevier, p. 4740–4757.e12, 2024.
ista: Ramadhin AR, Lee S-H, Zhou D, Testa Salmazo AP, Gonzalo-Hansen C, van Sluis
M, Blom CMA, Janssens RC, Raams A, Dekkers D, Bezstarosti K, Slade D, Vermeulen
W, Pines A, Demmers JAA, Bernecky C, Sixma TK, Marteijn JA. 2024. STK19 drives
transcription-coupled repair by stimulating repair complex stability, RNA Pol
II ubiquitylation, and TFIIH recruitment. Molecular Cell. 84(24), 4740–4757.e12.
mla: Ramadhin, Anisha R., et al. “STK19 Drives Transcription-Coupled Repair by Stimulating
Repair Complex Stability, RNA Pol II Ubiquitylation, and TFIIH Recruitment.” Molecular
Cell, vol. 84, no. 24, Elsevier, 2024, p. 4740–4757.e12, doi:10.1016/j.molcel.2024.10.030.
short: A.R. Ramadhin, S.-H. Lee, D. Zhou, A.P. Testa Salmazo, C. Gonzalo-Hansen,
M. van Sluis, C.M.A. Blom, R.C. Janssens, A. Raams, D. Dekkers, K. Bezstarosti,
D. Slade, W. Vermeulen, A. Pines, J.A.A. Demmers, C. Bernecky, T.K. Sixma, J.A.
Marteijn, Molecular Cell 84 (2024) 4740–4757.e12.
date_created: 2024-11-15T12:12:54Z
date_published: 2024-12-19T00:00:00Z
date_updated: 2025-09-08T14:42:50Z
day: '19'
ddc:
- '570'
department:
- _id: CaBe
doi: 10.1016/j.molcel.2024.10.030
external_id:
isi:
- '001395711300001'
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- '39547223'
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publication: Molecular Cell
publication_identifier:
issn:
- 1097-2765
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: STK19 drives transcription-coupled repair by stimulating repair complex stability,
RNA Pol II ubiquitylation, and TFIIH recruitment
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 84
year: '2024'
...
---
OA_place: publisher
_id: '18579'
abstract:
- lang: eng
text: 'Electrophysiological, calcium two-photon recordings and behavioral data for
Vega-Zuniga et al. Relevant information can be found in the ''README.txt'' files. '
acknowledged_ssus:
- _id: ScienComp
- _id: PreCl
- _id: M-Shop
- _id: Bio
- _id: LifeSc
acknowledgement: Freyja Lange, Michael Schunn, and Todor Asenov
article_processing_charge: No
author:
- first_name: Tomas A
full_name: Vega Zuniga, Tomas A
id: 2E7C4E78-F248-11E8-B48F-1D18A9856A87
last_name: Vega Zuniga
- first_name: Anton L
full_name: Sumser, Anton L
id: 3320A096-F248-11E8-B48F-1D18A9856A87
last_name: Sumser
orcid: 0000-0002-4792-1881
- first_name: Olga
full_name: Symonova, Olga
id: 3C0C7BC6-F248-11E8-B48F-1D18A9856A87
last_name: Symonova
orcid: 0000-0003-2012-9947
- first_name: Peter
full_name: Koppensteiner, Peter
id: 3B8B25A8-F248-11E8-B48F-1D18A9856A87
last_name: Koppensteiner
orcid: 0000-0002-3509-1948
- first_name: Florian
full_name: Schmidt, Florian
id: A2EF226A-AF19-11E9-924C-0525E6697425
last_name: Schmidt
- first_name: Maximilian A
full_name: Jösch, Maximilian A
id: 2BD278E6-F248-11E8-B48F-1D18A9856A87
last_name: Jösch
orcid: 0000-0002-3937-1330
citation:
ama: Vega Zuniga TA, Sumser AL, Symonova O, Koppensteiner P, Schmidt F, Jösch MA.
A thalamic hub-and-spoke network enables visual perception during action by coordinating
visuomotor dynamics. 2024. doi:10.15479/AT:ISTA:18579
apa: Vega Zuniga, T. A., Sumser, A. L., Symonova, O., Koppensteiner, P., Schmidt,
F., & Jösch, M. A. (2024). A thalamic hub-and-spoke network enables visual
perception during action by coordinating visuomotor dynamics. Institute of Science
and Technology Austria. https://doi.org/10.15479/AT:ISTA:18579
chicago: Vega Zuniga, Tomas A, Anton L Sumser, Olga Symonova, Peter Koppensteiner,
Florian Schmidt, and Maximilian A Jösch. “A Thalamic Hub-and-Spoke Network Enables
Visual Perception during Action by Coordinating Visuomotor Dynamics.” Institute
of Science and Technology Austria, 2024. https://doi.org/10.15479/AT:ISTA:18579.
ieee: T. A. Vega Zuniga, A. L. Sumser, O. Symonova, P. Koppensteiner, F. Schmidt,
and M. A. Jösch, “A thalamic hub-and-spoke network enables visual perception during
action by coordinating visuomotor dynamics.” Institute of Science and Technology
Austria, 2024.
ista: Vega Zuniga TA, Sumser AL, Symonova O, Koppensteiner P, Schmidt F, Jösch MA.
2024. A thalamic hub-and-spoke network enables visual perception during action
by coordinating visuomotor dynamics, Institute of Science and Technology Austria,
10.15479/AT:ISTA:18579.
mla: Vega Zuniga, Tomas A., et al. A Thalamic Hub-and-Spoke Network Enables Visual
Perception during Action by Coordinating Visuomotor Dynamics. Institute of
Science and Technology Austria, 2024, doi:10.15479/AT:ISTA:18579.
short: T.A. Vega Zuniga, A.L. Sumser, O. Symonova, P. Koppensteiner, F. Schmidt,
M.A. Jösch, (2024).
corr_author: '1'
date_created: 2024-11-22T13:48:12Z
date_published: 2024-12-09T00:00:00Z
date_updated: 2026-06-18T18:12:08Z
day: '09'
ddc:
- '570'
department:
- _id: MaJö
doi: 10.15479/AT:ISTA:18579
ec_funded: 1
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month: '12'
oa: 1
oa_version: Published Version
project:
- _id: 264FEA02-B435-11E9-9278-68D0E5697425
grant_number: ALTF 1098-2017
name: Connecting sensory with motor processing in the superior colliculus
- _id: 266D407A-B435-11E9-9278-68D0E5697425
grant_number: LT000256
name: Neuronal networks of salience and spatial detection in the murine superior
colliculus
- _id: 2634E9D2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '756502'
name: Circuits of Visual Attention
- _id: bdaf81a8-d553-11ed-ba76-c95961984540
grant_number: '101086580'
name: 'Action Selection in the Midbrain: Neuromodulation of Visuomotor Senses'
publisher: Institute of Science and Technology Austria
related_material:
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status: public
title: A thalamic hub-and-spoke network enables visual perception during action by
coordinating visuomotor dynamics
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: research_data
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
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...
---
OA_place: publisher
OA_type: hybrid
_id: '18596'
abstract:
- lang: eng
text: Hormone perception and signaling pathways have a fundamental regulatory function
in the physiological processes of plants. Cytokinins, a class of plant hormones,
regulate cell division and meristem maintenance. The cytokinin signaling pathway
is well established in the model plant Arabidopsis thaliana. Several negative
feedback mechanisms, tightly controlling cytokinin signaling output, have been
described previously. In this study, we identified a new feedback mechanism executed
through alternative splicing of the cytokinin receptor AHK4/CRE1. A novel splicing
variant named CRE1int7 results from seventh intron retention, introducing a premature
termination codon in the transcript. We showed that CRE1int7 is translated in
planta into a truncated receptor lacking the C-terminal receiver domain essential
for signal transduction. CRE1int7 can bind cytokinin but cannot activate the downstream
cascade. We present a novel negative feedback mechanism of the cytokinin signaling
pathway, facilitated by a decoy receptor that can inactivate canonical cytokinin
receptors via dimerization and compete with them for ligand binding. Ensuring
proper plant growth and development requires precise control of the cytokinin
signaling pathway at several levels. CRE1int7 represents a so-far unknown mechanism
for fine-tuning the cytokinin signaling pathway in Arabidopsis.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
acknowledgement: We dedicate this paper to the deceased Petr Galuszka for his inspiration
and support of our project. We thank Prof. Peter Hedden for constructive criticism
of the manuscript and English editing. No conflict of interest is declared.
article_processing_charge: Yes (in subscription journal)
article_type: original
author:
- first_name: Michaela
full_name: Králová, Michaela
last_name: Králová
- first_name: Ivona
full_name: Kubalová, Ivona
last_name: Kubalová
- first_name: Jakub
full_name: Hajný, Jakub
last_name: Hajný
- first_name: Karolina
full_name: Kubiasova, Karolina
id: 946011F4-3E71-11EA-860B-C7A73DDC885E
last_name: Kubiasova
orcid: 0000-0001-5630-9419
- first_name: Karolína
full_name: Vagaská, Karolína
last_name: Vagaská
- first_name: Zengxiang
full_name: Ge, Zengxiang
id: f43371a3-09ff-11eb-8013-bd0c6a2f6de8
last_name: Ge
orcid: 0000-0001-9381-3577
- first_name: Michelle C
full_name: Gallei, Michelle C
id: 35A03822-F248-11E8-B48F-1D18A9856A87
last_name: Gallei
orcid: 0000-0003-1286-7368
- first_name: Hana
full_name: Semerádová, Hana
id: 42FE702E-F248-11E8-B48F-1D18A9856A87
last_name: Semerádová
- first_name: Anna
full_name: Kuchařová, Anna
last_name: Kuchařová
- first_name: Martin
full_name: Hönig, Martin
last_name: Hönig
- first_name: Aline
full_name: Monzer, Aline
id: 2DB5D88C-D7B3-11E9-B8FD-7907E6697425
last_name: Monzer
- first_name: Martin
full_name: Kovačik, Martin
last_name: Kovačik
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Ondřej
full_name: Novák, Ondřej
last_name: Novák
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
- first_name: Yoshihisa
full_name: Ikeda, Yoshihisa
last_name: Ikeda
- first_name: David
full_name: Zalabák, David
last_name: Zalabák
citation:
ama: Králová M, Kubalová I, Hajný J, et al. A decoy receptor derived from alternative
splicing fine-tunes cytokinin signaling in Arabidopsis. Molecular Plant.
2024;17(12):1850-1865. doi:10.1016/j.molp.2024.11.001
apa: Králová, M., Kubalová, I., Hajný, J., Kubiasova, K., Vagaská, K., Ge, Z., …
Zalabák, D. (2024). A decoy receptor derived from alternative splicing fine-tunes
cytokinin signaling in Arabidopsis. Molecular Plant. Elsevier. https://doi.org/10.1016/j.molp.2024.11.001
chicago: Králová, Michaela, Ivona Kubalová, Jakub Hajný, Karolina Kubiasova, Karolína
Vagaská, Zengxiang Ge, Michelle C Gallei, et al. “A Decoy Receptor Derived from
Alternative Splicing Fine-Tunes Cytokinin Signaling in Arabidopsis.” Molecular
Plant. Elsevier, 2024. https://doi.org/10.1016/j.molp.2024.11.001.
ieee: M. Králová et al., “A decoy receptor derived from alternative splicing
fine-tunes cytokinin signaling in Arabidopsis,” Molecular Plant, vol. 17,
no. 12. Elsevier, pp. 1850–1865, 2024.
ista: Králová M, Kubalová I, Hajný J, Kubiasova K, Vagaská K, Ge Z, Gallei MC, Semerádová
H, Kuchařová A, Hönig M, Monzer A, Kovačik M, Friml J, Novák O, Benková E, Ikeda
Y, Zalabák D. 2024. A decoy receptor derived from alternative splicing fine-tunes
cytokinin signaling in Arabidopsis. Molecular Plant. 17(12), 1850–1865.
mla: Králová, Michaela, et al. “A Decoy Receptor Derived from Alternative Splicing
Fine-Tunes Cytokinin Signaling in Arabidopsis.” Molecular Plant, vol. 17,
no. 12, Elsevier, 2024, pp. 1850–65, doi:10.1016/j.molp.2024.11.001.
short: M. Králová, I. Kubalová, J. Hajný, K. Kubiasova, K. Vagaská, Z. Ge, M.C.
Gallei, H. Semerádová, A. Kuchařová, M. Hönig, A. Monzer, M. Kovačik, J. Friml,
O. Novák, E. Benková, Y. Ikeda, D. Zalabák, Molecular Plant 17 (2024) 1850–1865.
date_created: 2024-11-28T11:13:35Z
date_published: 2024-12-02T00:00:00Z
date_updated: 2025-09-08T14:46:45Z
day: '02'
ddc:
- '580'
department:
- _id: JiFr
- _id: EvBe
doi: 10.1016/j.molp.2024.11.001
external_id:
isi:
- '001373778300001'
pmid:
- '39501563'
file:
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creator: dernst
date_created: 2024-12-03T11:08:09Z
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file_name: 2024_MolecularPlant_Kralova.pdf
file_size: 3308945
relation: main_file
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file_date_updated: 2024-12-03T11:08:09Z
has_accepted_license: '1'
intvolume: ' 17'
isi: 1
issue: '12'
language:
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license: https://creativecommons.org/licenses/by-nc-nd/4.0/
month: '12'
oa: 1
oa_version: Published Version
page: 1850-1865
pmid: 1
publication: Molecular Plant
publication_identifier:
issn:
- 1674-2052
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: A decoy receptor derived from alternative splicing fine-tunes cytokinin signaling
in Arabidopsis
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 17
year: '2024'
...
---
OA_place: repository
_id: '18677'
abstract:
- lang: eng
text: The information-processing capability of the brain’s cellular network depends
on the physical wiring pattern between neurons and their molecular and functional
characteristics. Mapping neurons and resolving their individual synaptic connections
can be achieved by volumetric imaging at nanoscale resolution with dense cellular
labeling. Light microscopy is uniquely positioned to visualize specific molecules
but dense, synapse-level circuit reconstruction by light microscopy has been out
of reach due to limitations in resolution, contrast, and volumetric imaging capability.
Here we developed light-microscopy based connectomics (LICONN). We integrated
specifically engineered hydrogel embedding and expansion with comprehensive deep-learning
based segmentation and analysis of connectivity, thus directly incorporating molecular
information in synapse-level brain tissue reconstructions. LICONN will allow synapse-level
brain tissue phenotyping in biological experiments in a readily adoptable manner.
acknowledged_ssus:
- _id: E-Lib
- _id: M-Shop
- _id: LifeSc
- _id: Bio
- _id: ScienComp
acknowledgement: "We thank Sven Dorkenwald and Peter Li for critical reading of the\r\nmanuscript.
We acknowledge expert support by ISTA’s scientific service units: Imaging and\r\nOptics,
Lab Support, Scientific Computing, Preclinical Facility, Miba Machine Shop, and
Library.\r\nWe gratefully acknowledge funding by the following sources:\r\nAustrian
Science Fund (FWF) grant DK W1232 (JGD, MRT)\r\nAustrian Academy of Sciences DOC
fellowship 26137 (MRT)\r\nEU Horizon 2020 program, Marie Skłodowska-Curie Actions
Fellowship 665385 (JL)\r\nGesellschaft für Forschungsförderung NÖ (NFB) grant LSC18-022
(JGD)\r\nEuropean Union’s Horizon 2020 research and innovation programme, European
Research\r\nCouncil (ERC) grant 101044865 “SecretAutism.”\r\n"
article_processing_charge: No
author:
- first_name: Mojtaba
full_name: Tavakoli, Mojtaba
id: 3A0A06F4-F248-11E8-B48F-1D18A9856A87
last_name: Tavakoli
orcid: 0000-0002-7667-6854
- first_name: Julia
full_name: Lyudchik, Julia
id: 46E28B80-F248-11E8-B48F-1D18A9856A87
last_name: Lyudchik
- first_name: Michał
full_name: Januszewski, Michał
last_name: Januszewski
- first_name: Vitali
full_name: Vistunou, Vitali
id: 7e146587-8972-11ed-ae7b-d7a32ea86a81
last_name: Vistunou
- first_name: Nathalie
full_name: Agudelo Duenas, Nathalie
id: 40E7F008-F248-11E8-B48F-1D18A9856A87
last_name: Agudelo Duenas
- first_name: Jakob
full_name: Vorlaufer, Jakob
id: 937696FA-C996-11E9-8C7C-CF13E6697425
last_name: Vorlaufer
orcid: 0009-0000-7590-3501
- first_name: Christoph M
full_name: Sommer, Christoph M
id: 4DF26D8C-F248-11E8-B48F-1D18A9856A87
last_name: Sommer
orcid: 0000-0003-1216-9105
- first_name: Caroline
full_name: Kreuzinger, Caroline
id: 382077BA-F248-11E8-B48F-1D18A9856A87
last_name: Kreuzinger
- first_name: Bárbara
full_name: Oliveira, Bárbara
id: 3B03AA1A-F248-11E8-B48F-1D18A9856A87
last_name: Oliveira
- first_name: Alban
full_name: Cenameri, Alban
id: 9ac8f577-2357-11eb-997a-e566c5550886
last_name: Cenameri
- first_name: Gaia
full_name: Novarino, Gaia
id: 3E57A680-F248-11E8-B48F-1D18A9856A87
last_name: Novarino
orcid: 0000-0002-7673-7178
- first_name: Viren
full_name: Jain, Viren
last_name: Jain
- first_name: Johann G
full_name: Danzl, Johann G
id: 42EFD3B6-F248-11E8-B48F-1D18A9856A87
last_name: Danzl
orcid: 0000-0001-8559-3973
citation:
ama: Tavakoli M, Lyudchik J, Januszewski M, et al. Light-microscopy based dense
connectomic reconstruction of mammalian brain tissue. bioRxiv. doi:10.1101/2024.03.01.582884
apa: Tavakoli, M., Lyudchik, J., Januszewski, M., Vistunou, V., Agudelo Duenas,
N., Vorlaufer, J., … Danzl, J. G. (n.d.). Light-microscopy based dense connectomic
reconstruction of mammalian brain tissue. bioRxiv. https://doi.org/10.1101/2024.03.01.582884
chicago: Tavakoli, Mojtaba, Julia Lyudchik, Michał Januszewski, Vitali Vistunou,
Nathalie Agudelo Duenas, Jakob Vorlaufer, Christoph M Sommer, et al. “Light-Microscopy
Based Dense Connectomic Reconstruction of Mammalian Brain Tissue.” BioRxiv,
n.d. https://doi.org/10.1101/2024.03.01.582884.
ieee: M. Tavakoli et al., “Light-microscopy based dense connectomic reconstruction
of mammalian brain tissue,” bioRxiv. .
ista: Tavakoli M, Lyudchik J, Januszewski M, Vistunou V, Agudelo Duenas N, Vorlaufer
J, Sommer CM, Kreuzinger C, Oliveira B, Cenameri A, Novarino G, Jain V, Danzl
JG. Light-microscopy based dense connectomic reconstruction of mammalian brain
tissue. bioRxiv, 10.1101/2024.03.01.582884.
mla: Tavakoli, Mojtaba, et al. “Light-Microscopy Based Dense Connectomic Reconstruction
of Mammalian Brain Tissue.” BioRxiv, doi:10.1101/2024.03.01.582884.
short: M. Tavakoli, J. Lyudchik, M. Januszewski, V. Vistunou, N. Agudelo Duenas,
J. Vorlaufer, C.M. Sommer, C. Kreuzinger, B. Oliveira, A. Cenameri, G. Novarino,
V. Jain, J.G. Danzl, BioRxiv (n.d.).
corr_author: '1'
date_created: 2024-12-18T14:48:24Z
date_published: 2024-07-08T00:00:00Z
date_updated: 2026-04-28T13:33:34Z
day: '08'
department:
- _id: GaNo
- _id: JoDa
doi: 10.1101/2024.03.01.582884
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1101/2024.03.01.582884
month: '07'
oa: 1
oa_version: Preprint
project:
- _id: 6285a163-2b32-11ec-9570-8e204ca2dba5
grant_number: '26137'
name: Studying Organelle Structure and Function at Nanoscale Resolution with Expansion
Microscopy
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 34ba8964-11ca-11ed-8bc3-e15864e7e9a6
grant_number: '101044865'
name: Toward an understanding of the brain interstitial system and the extracellular
proteome in health and autism spectrum disorders
- _id: 26AA4EF2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: W1232-B24
name: Molecular Drug Targets
publication: bioRxiv
publication_status: draft
related_material:
record:
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relation: dissertation_contains
status: public
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relation: later_version
status: public
status: public
title: Light-microscopy based dense connectomic reconstruction of mammalian brain
tissue
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2024'
...
---
OA_embargo: '20'
OA_place: publisher
_id: '18681'
acknowledged_ssus:
- _id: Bio
- _id: PreCl
- _id: LifeSc
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Mojtaba
full_name: Tavakoli, Mojtaba
id: 3A0A06F4-F248-11E8-B48F-1D18A9856A87
last_name: Tavakoli
orcid: 0000-0002-7667-6854
citation:
ama: 'Tavakoli M. Developing molecular and structural tools for studying brain architecture
with super resolution expansion microscopy. LICONN: Molecularly-informed connectomics
reconstruction with light microscopy. 2024. doi:10.15479/at:ista:18681'
apa: 'Tavakoli, M. (2024). Developing molecular and structural tools for studying
brain architecture with super resolution expansion microscopy. LICONN: Molecularly-informed
connectomics reconstruction with light microscopy. Institute of Science and
Technology Austria. https://doi.org/10.15479/at:ista:18681'
chicago: 'Tavakoli, Mojtaba. “Developing Molecular and Structural Tools for Studying
Brain Architecture with Super Resolution Expansion Microscopy. LICONN: Molecularly-Informed
Connectomics Reconstruction with Light Microscopy.” Institute of Science and Technology
Austria, 2024. https://doi.org/10.15479/at:ista:18681.'
ieee: 'M. Tavakoli, “Developing molecular and structural tools for studying brain
architecture with super resolution expansion microscopy. LICONN: Molecularly-informed
connectomics reconstruction with light microscopy,” Institute of Science and Technology
Austria, 2024.'
ista: 'Tavakoli M. 2024. Developing molecular and structural tools for studying
brain architecture with super resolution expansion microscopy. LICONN: Molecularly-informed
connectomics reconstruction with light microscopy. Institute of Science and Technology
Austria.'
mla: 'Tavakoli, Mojtaba. Developing Molecular and Structural Tools for Studying
Brain Architecture with Super Resolution Expansion Microscopy. LICONN: Molecularly-Informed
Connectomics Reconstruction with Light Microscopy. Institute of Science and
Technology Austria, 2024, doi:10.15479/at:ista:18681.'
short: 'M. Tavakoli, Developing Molecular and Structural Tools for Studying Brain
Architecture with Super Resolution Expansion Microscopy. LICONN: Molecularly-Informed
Connectomics Reconstruction with Light Microscopy, Institute of Science and Technology
Austria, 2024.'
corr_author: '1'
date_created: 2024-12-19T02:30:39Z
date_published: 2024-12-20T00:00:00Z
date_updated: 2026-04-07T12:56:37Z
day: '20'
ddc:
- '600'
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: JoDa
doi: 10.15479/at:ista:18681
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date_updated: 2024-12-20T10:25:12Z
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has_accepted_license: '1'
language:
- iso: eng
month: '12'
oa_version: Published Version
page: '230'
project:
- _id: 6285a163-2b32-11ec-9570-8e204ca2dba5
grant_number: '26137'
name: Studying Organelle Structure and Function at Nanoscale Resolution with Expansion
Microscopy
- _id: 26AA4EF2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: W1232-B24
name: Molecular Drug Targets
publication_identifier:
isbn:
- 978-3-99078-048-0
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
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relation: part_of_dissertation
status: public
- id: '18688'
relation: part_of_dissertation
status: public
- id: '18677'
relation: part_of_dissertation
status: public
- id: '18689'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Johann G
full_name: Danzl, Johann G
id: 42EFD3B6-F248-11E8-B48F-1D18A9856A87
last_name: Danzl
orcid: 0000-0001-8559-3973
title: 'Developing molecular and structural tools for studying brain architecture
with super resolution expansion microscopy. LICONN: Molecularly-informed connectomics
reconstruction with light microscopy'
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_place: repository
_id: '18688'
abstract:
- lang: eng
text: The human brain has remarkable computational power. It generates sophisticated
behavioral sequences, stores engrams over an individual’s lifetime, and produces
higher cognitive functions up to the level of consciousness. However, so little
of our neuroscience knowledge covers the human brain, and it remains unknown whether
this organ is truly unique, or is a scaled version of the extensively studied
rodent brain. To address this fundamental question, we determined the cellular,
synaptic, and connectivity rules of the hippocampal CA3 recurrent circuit using
multicellular patch clamp-recording. This circuit is the largest autoassociative
network in the brain, and plays a key role in memory and higher-order computations
such as pattern separation and pattern completion. We demonstrate that human hippocampal
CA3 employs sparse connectivity, in stark contrast to neocortical recurrent networks.
Connectivity sparsifies from rodents to humans, providing a circuit architecture
that maximizes associational power. Unitary synaptic events at human CA3–CA3 synapses
showed both distinct species-specific and circuit-dependent properties, with high
reliability, unique amplitude precision, and long integration times. We also identify
differential scaling rules between hippocampal pathways from rodents to humans,
with a moderate increase in the convergence of CA3 inputs per cell, but a marked
increase in human mossy fiber innervation. Anatomically guided full-scale modeling
suggests that the human brain’s sparse connectivity, expanded neuronal number,
and reliable synaptic signaling combine to enhance the associative memory storage
capacity of CA3. Together, our results reveal unique rules of connectivity and
synaptic signaling in the human hippocampus, demonstrating the absolute necessity
of human brain research and beginning to unravel the remarkable performance of
our autoassociative memory circuits.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: M-Shop
- _id: PreCl
- _id: ScienComp
acknowledgement: We thank Florian Marr for excellent technical assistance, Christina
Altmutter and Julia Flor for technical support, Alois Schlögl for programming, Todor
Asenov for development of the transportation box for human brain tissue, Tim Vogels
for guidance on simulations, Marcus Huber for mathematical advice, and Eleftheria
Kralli-Beller for manuscript editing. This research was supported by the Scientific
Services Units (SSUs) of ISTA, and we are particularly grateful for assistance from
Christoph Sommer and the Imaging and Optics Facility, Preclinical Facility, Life
Science Facility, Miba Machine Shop, and Scientific Computing. We also acknowledge
the excellent support of the Medical University of Vienna Department of Neurosurgery
staff, Romana Hoeftberger and the Division of Neuropathology and Neurochemistry,
and Gregor Kasprian and the Division of Neuroradiology and Musculoskeletal Radiology.
The project received funding from the European Research Council (ERC) under the
European Union’s Horizon 2020 research and innovation programme (Marie Skłodowska-Curie
Actions Individual Fellowship no. 101026635 to J.F.W.), the Austrian Science Fund
(FWF; grant PAT 4178023 to P.J.; grant DK W1232 to M.R.T. and J.G.D.) and the Austrian
Academy of Sciences (DOC fellowship 26137 to M.R.T.).
article_processing_charge: No
author:
- first_name: Jake F.
full_name: Watson, Jake F.
last_name: Watson
- first_name: Victor
full_name: Vargas-Barroso, Victor
last_name: Vargas-Barroso
- first_name: Rebecca J.
full_name: Morse-Mora, Rebecca J.
last_name: Morse-Mora
- first_name: Andrea
full_name: Navas-Olive, Andrea
last_name: Navas-Olive
- first_name: Mojtaba
full_name: Tavakoli, Mojtaba
id: 3A0A06F4-F248-11E8-B48F-1D18A9856A87
last_name: Tavakoli
orcid: 0000-0002-7667-6854
- first_name: Johann G
full_name: Danzl, Johann G
id: 42EFD3B6-F248-11E8-B48F-1D18A9856A87
last_name: Danzl
orcid: 0000-0001-8559-3973
- first_name: Matthias
full_name: Tomschik, Matthias
last_name: Tomschik
- first_name: Karl
full_name: Rössler, Karl
last_name: Rössler
- first_name: Peter M
full_name: Jonas, Peter M
id: 353C1B58-F248-11E8-B48F-1D18A9856A87
last_name: Jonas
orcid: 0000-0001-5001-4804
citation:
ama: Watson JF, Vargas-Barroso V, Morse-Mora RJ, et al. Human hippocampal CA3 uses
specific functional connectivity rules for efficient associative memory. bioRxiv.
doi:10.1101/2024.05.02.592169
apa: Watson, J. F., Vargas-Barroso, V., Morse-Mora, R. J., Navas-Olive, A., Tavakoli,
M., Danzl, J. G., … Jonas, P. M. (n.d.). Human hippocampal CA3 uses specific functional
connectivity rules for efficient associative memory. bioRxiv. https://doi.org/10.1101/2024.05.02.592169
chicago: Watson, Jake F., Victor Vargas-Barroso, Rebecca J. Morse-Mora, Andrea Navas-Olive,
Mojtaba Tavakoli, Johann G Danzl, Matthias Tomschik, Karl Rössler, and Peter M
Jonas. “Human Hippocampal CA3 Uses Specific Functional Connectivity Rules for
Efficient Associative Memory.” BioRxiv, n.d. https://doi.org/10.1101/2024.05.02.592169.
ieee: J. F. Watson et al., “Human hippocampal CA3 uses specific functional
connectivity rules for efficient associative memory,” bioRxiv. .
ista: Watson JF, Vargas-Barroso V, Morse-Mora RJ, Navas-Olive A, Tavakoli M, Danzl
JG, Tomschik M, Rössler K, Jonas PM. Human hippocampal CA3 uses specific functional
connectivity rules for efficient associative memory. bioRxiv, 10.1101/2024.05.02.592169.
mla: Watson, Jake F., et al. “Human Hippocampal CA3 Uses Specific Functional Connectivity
Rules for Efficient Associative Memory.” BioRxiv, doi:10.1101/2024.05.02.592169.
short: J.F. Watson, V. Vargas-Barroso, R.J. Morse-Mora, A. Navas-Olive, M. Tavakoli,
J.G. Danzl, M. Tomschik, K. Rössler, P.M. Jonas, BioRxiv (n.d.).
corr_author: '1'
date_created: 2024-12-19T11:35:08Z
date_published: 2024-05-02T00:00:00Z
date_updated: 2026-04-14T08:34:32Z
day: '02'
department:
- _id: JoDa
- _id: PeJo
doi: 10.1101/2024.05.02.592169
ec_funded: 1
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1101/2024.05.02.592169
month: '05'
oa: 1
oa_version: Preprint
project:
- _id: fc2be41b-9c52-11eb-aca3-faa90aa144e9
call_identifier: H2020
grant_number: '101026635'
name: Synaptic computations of the hippocampal CA3 circuitry
- _id: 26AA4EF2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: W1232-B24
name: Molecular Drug Targets
- _id: 6285a163-2b32-11ec-9570-8e204ca2dba5
grant_number: '26137'
name: Studying Organelle Structure and Function at Nanoscale Resolution with Expansion
Microscopy
publication: bioRxiv
publication_status: draft
related_material:
record:
- id: '18681'
relation: dissertation_contains
status: public
- id: '18879'
relation: later_version
status: public
status: public
title: Human hippocampal CA3 uses specific functional connectivity rules for efficient
associative memory
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2024'
...
---
OA_place: repository
_id: '18689'
abstract:
- lang: eng
text: Multiplexed fluorescence microscopy imaging is widely used in biomedical applications.
However, simultaneous imaging of multiple fluorophores can result in spectral
leaks and overlapping, which greatly degrades image quality and subsequent analysis.
Existing popular spectral unmixing methods are mainly based on computational intensive
linear models and the performance is heavily dependent on the reference spectra,
which may greatly preclude its further applications. In this paper, we propose
a deep learning-based blindly spectral unmixing method, termed AutoUnmix, to imitate
the physical spectral mixing process. A tranfer learning framework is further
devised to allow our AutoUnmix adapting to a variety of imaging systems without
retraining the network. Our proposed method has demonstrated real-time unmixing
capabilities, surpassing existing methods by up to 100-fold in terms of unmixing
speed. We further validate the reconstruction performance on both synthetic datasets
and biological samples. The unmixing results of AutoUnmix achieve a highest SSIM
of 0.99 in both three- and four-color imaging, with nearly up to 20% higher than
other popular unmixing methods. Due to the desirable property of data independency
and superior blind unmixing performance, we believe AutoUnmix is a powerful tool
to study the interaction process of different organelles labeled by multiple fluorophores.
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: M-Shop
- _id: E-Lib
acknowledgement: "We gratefully acknowledge support by the Scientific Service Units
at ISTA, including the Imaging and Optics and Lab Support facilities and the mechanical
workshop and Library. We thank Philipp Velicky for STED microscope alignment.\r\n\r\nThis
project has received funding from the Austrian Science Fund (FWF): I 3630-B25 (J.G.D)
and the European Research Council (ERC) under the European Union’s Horizon 2020
research and innovation programme (grant agreement No 742985, J.F.). It has also
received funding from the European Union’s Horizon 2020 research and innovation
programme under the Marie Skłodowska-Curie Grant Agreement No. 665385. S.T. has
received funding as an ISTplus Fellow from the European Union’s Horizon 2020 Research
and Innovation Programme under Marie Skłodowska-Curie grant agreement no. 754411
and from an EMBO Long-Term Fellowship (grant number ALTF 679-2018). It has further
received funding from the Austrian Science Fund (FWF) grant DK W1232 (M.T, N.A-D.,
J.G.D). W.J. received funding via a Human Frontier Science Program postdoctoral
fellowship LT000557/2018.\r\n\r\nThe funders had no role in study design, data collection
and analysis, decision to publish or preparation of the manuscript."
article_processing_charge: No
author:
- first_name: Michelle C
full_name: Gallei, Michelle C
id: 35A03822-F248-11E8-B48F-1D18A9856A87
last_name: Gallei
orcid: 0000-0003-1286-7368
- first_name: Sven M
full_name: Truckenbrodt, Sven M
id: 45812BD4-F248-11E8-B48F-1D18A9856A87
last_name: Truckenbrodt
- first_name: Caroline
full_name: Kreuzinger, Caroline
id: 382077BA-F248-11E8-B48F-1D18A9856A87
last_name: Kreuzinger
- first_name: Syamala
full_name: Inumella, Syamala
id: F8660870-D756-11E9-98C5-34DFE5697425
last_name: Inumella
orcid: 0009-0002-5890-120X
- first_name: Vitali
full_name: Vistunou, Vitali
id: 7e146587-8972-11ed-ae7b-d7a32ea86a81
last_name: Vistunou
- first_name: Christoph M
full_name: Sommer, Christoph M
id: 4DF26D8C-F248-11E8-B48F-1D18A9856A87
last_name: Sommer
orcid: 0000-0003-1216-9105
- first_name: Mojtaba
full_name: Tavakoli, Mojtaba
id: 3A0A06F4-F248-11E8-B48F-1D18A9856A87
last_name: Tavakoli
orcid: 0000-0002-7667-6854
- first_name: Nathalie
full_name: Agudelo Duenas, Nathalie
id: 40E7F008-F248-11E8-B48F-1D18A9856A87
last_name: Agudelo Duenas
- first_name: Jakob
full_name: Vorlaufer, Jakob
id: 937696FA-C996-11E9-8C7C-CF13E6697425
last_name: Vorlaufer
orcid: 0009-0000-7590-3501
- first_name: Wiebke
full_name: Jahr, Wiebke
id: 425C1CE8-F248-11E8-B48F-1D18A9856A87
last_name: Jahr
orcid: 0000-0003-0201-2315
- first_name: Marek
full_name: Randuch, Marek
id: 6ac4636d-15b2-11ec-abd3-fb8df79972ae
last_name: Randuch
- first_name: Alexander J
full_name: Johnson, Alexander J
id: 46A62C3A-F248-11E8-B48F-1D18A9856A87
last_name: Johnson
orcid: 0000-0002-2739-8843
- first_name: Eva
full_name: Benková, Eva
id: 38F4F166-F248-11E8-B48F-1D18A9856A87
last_name: Benková
orcid: 0000-0002-8510-9739
- first_name: Jiří
full_name: Friml, Jiří
id: 4159519E-F248-11E8-B48F-1D18A9856A87
last_name: Friml
orcid: 0000-0002-8302-7596
- first_name: Johann G
full_name: Danzl, Johann G
id: 42EFD3B6-F248-11E8-B48F-1D18A9856A87
last_name: Danzl
orcid: 0000-0001-8559-3973
citation:
ama: Gallei MC, Truckenbrodt SM, Kreuzinger C, et al. Super-resolution expansion
microscopy in plant roots. bioRxiv. doi:10.1101/2024.02.21.581330
apa: Gallei, M. C., Truckenbrodt, S. M., Kreuzinger, C., Inumella, S., Vistunou,
V., Sommer, C. M., … Danzl, J. G. (n.d.). Super-resolution expansion microscopy
in plant roots. bioRxiv. https://doi.org/10.1101/2024.02.21.581330
chicago: Gallei, Michelle C, Sven M Truckenbrodt, Caroline Kreuzinger, Syamala Inumella,
Vitali Vistunou, Christoph M Sommer, Mojtaba Tavakoli, et al. “Super-Resolution
Expansion Microscopy in Plant Roots.” BioRxiv, n.d. https://doi.org/10.1101/2024.02.21.581330.
ieee: M. C. Gallei et al., “Super-resolution expansion microscopy in plant
roots,” bioRxiv. .
ista: Gallei MC, Truckenbrodt SM, Kreuzinger C, Inumella S, Vistunou V, Sommer CM,
Tavakoli M, Agudelo Duenas N, Vorlaufer J, Jahr W, Randuch M, Johnson AJ, Benková
E, Friml J, Danzl JG. Super-resolution expansion microscopy in plant roots. bioRxiv,
10.1101/2024.02.21.581330.
mla: Gallei, Michelle C., et al. “Super-Resolution Expansion Microscopy in Plant
Roots.” BioRxiv, doi:10.1101/2024.02.21.581330.
short: M.C. Gallei, S.M. Truckenbrodt, C. Kreuzinger, S. Inumella, V. Vistunou,
C.M. Sommer, M. Tavakoli, N. Agudelo Duenas, J. Vorlaufer, W. Jahr, M. Randuch,
A.J. Johnson, E. Benková, J. Friml, J.G. Danzl, BioRxiv (n.d.).
corr_author: '1'
date_created: 2024-12-19T12:28:00Z
date_published: 2024-02-21T00:00:00Z
date_updated: 2026-04-07T12:56:36Z
day: '21'
department:
- _id: EvBe
- _id: JoDa
- _id: JiFr
doi: 10.1101/2024.02.21.581330
ec_funded: 1
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc/4.0/
main_file_link:
- open_access: '1'
url: https://doi.org/10.1101/2024.02.21.581330
month: '02'
oa: 1
oa_version: Preprint
project:
- _id: 261099A6-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '742985'
name: Tracing Evolution of Auxin Transport and Polarity in Plants
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 26AA4EF2-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: W1232-B24
name: Molecular Drug Targets
- _id: 269B5B22-B435-11E9-9278-68D0E5697425
grant_number: ALTF 679-2018
name: UltraX - achieving sub-nanometer resolution in light microscopy using iterative
X10 microscopy in combination with nanobodies and STED
publication: bioRxiv
publication_status: draft
related_material:
record:
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relation: later_version
status: public
- id: '18681'
relation: dissertation_contains
status: public
status: public
title: Super-resolution expansion microscopy in plant roots
tmp:
image: /images/cc_by_nc.png
legal_code_url: https://creativecommons.org/licenses/by-nc/4.0/legalcode
name: Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)
short: CC BY-NC (4.0)
type: preprint
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
year: '2024'
...
---
OA_place: publisher
_id: '18766'
abstract:
- lang: eng
text: Poxviruses are large pleomorphic double-stranded DNA viruses that include
well known members such as variola virus, the causative agent of smallpox, Mpox
virus, as well as Vaccinia virus (VACV), which serves as a vaccination strain
for formerly mentioned viruses. VACV is a valuable model for studying large pleomorphic
DNA viruses in general and poxviruses specifically, as many features, such as
core morphology and structural proteins, are well conserved within this family.
Despite decades of research, our understanding of the structural components and
proteins that comprise the poxvirus core in mature virions remains limited. Although
major core proteins were identified via indirect experimental evidence, the core's
complexity, with its large size, structure and number of involved proteins, has
hindered efforts to achieve high-resolution insights and to define the roles of
the individual proteins. The specific protein composition of the core's individual
layers, including the palisade layer and the inner core wall, has remained unclear.
In this study, we have merged multiple approaches, including single particle cryo
electron microscopy of purified virus cores, cryo-electron tomography and subtomogram
averaging of mature virions and molecular modeling to elucidate the structural
determinants of the VACV core. Due to the lack of experimentally derived structures,
either in situ or reconstituted in vitro, we used Alphafold to predict models
of the putative major core protein candidates, A10, 23k, A3, A4, and L4. Our results
show that the VACV core is composed of several layers with varying local symmetries,
forming more intricate interactions than observed previously. This allowed us
to identify several molecular building blocks forming the viral core lattice.
In particular, we identified trimers of protein A10 as a major core structure
that forms the palisade layer of the viral core. Additionally, we revealed that
six petals of a flower shaped core pore within the core wall are composed of A10
trimers. Furthermore, we obtained a cryo-EM density for the inner core wall that
could potentially accommodate an A3 dimer. Integrating descriptions of protein
interactions from previous studies enabled us to provide a detailed structural
model of the poxvirus core wall, and our findings indicate that the interactions
within A10 trimers are likely consistent across orthopox- and parapoxviruses.
This combined application of cryo-SPA and cryo-ET can help overcome obstacles
in studying complex virus structures in the future, including their key assembly
proteins, interactions, and the formation into a core lattice. Our work provides
important fundamental new insights into poxvirus core architecture, also considering
the recent re-emergence of poxviruses.
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
- _id: ScienComp
acknowledgement: "This work was funded by the Austrian Science Fund (FWF) grant P31445
and ISTA. I\r\nwould like to express my gratitude to the Scientific Service Units,
particularly the Lab\r\nSupport Facility, the Scientific Computing Facility and
the Electron Microscopy Facility\r\nfor their tremendous support. I want to especially
thank Alois for assisting me with the\r\ninstallation of countless new software
and for troubleshooting cluster issues. A special\r\nthanks goes to Valentin for
his outstanding support in cryo-EM data acquisition and\r\nhis ongoing help in improving
the process to ensure that I obtained the best possible\r\ndata from my sample."
alternative_title:
- ISTA thesis
article_processing_charge: No
author:
- first_name: Julia
full_name: Datler, Julia
id: 3B12E2E6-F248-11E8-B48F-1D18A9856A87
last_name: Datler
orcid: 0000-0002-3616-8580
citation:
ama: Datler J. Elucidating the structural determinants of the poxvirus core using
multi-modal cryo-EM. 2024. doi:10.15479/at:ista:18766
apa: Datler, J. (2024). Elucidating the structural determinants of the poxvirus
core using multi-modal cryo-EM. Institute of Science and Technology Austria.
https://doi.org/10.15479/at:ista:18766
chicago: Datler, Julia. “Elucidating the Structural Determinants of the Poxvirus
Core Using Multi-Modal Cryo-EM.” Institute of Science and Technology Austria,
2024. https://doi.org/10.15479/at:ista:18766.
ieee: J. Datler, “Elucidating the structural determinants of the poxvirus core using
multi-modal cryo-EM,” Institute of Science and Technology Austria, 2024.
ista: Datler J. 2024. Elucidating the structural determinants of the poxvirus core
using multi-modal cryo-EM. Institute of Science and Technology Austria.
mla: Datler, Julia. Elucidating the Structural Determinants of the Poxvirus Core
Using Multi-Modal Cryo-EM. Institute of Science and Technology Austria, 2024,
doi:10.15479/at:ista:18766.
short: J. Datler, Elucidating the Structural Determinants of the Poxvirus Core Using
Multi-Modal Cryo-EM, Institute of Science and Technology Austria, 2024.
corr_author: '1'
date_created: 2025-01-07T10:23:12Z
date_published: 2024-12-30T00:00:00Z
date_updated: 2026-04-07T12:59:44Z
day: '30'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: FlSc
doi: 10.15479/at:ista:18766
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date_updated: 2025-01-07T12:15:11Z
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file_size: 38814932
relation: source_file
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content_type: application/pdf
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date_created: 2025-01-07T12:15:14Z
date_updated: 2025-01-07T12:15:14Z
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success: 1
file_date_updated: 2025-01-07T12:15:14Z
has_accepted_license: '1'
keyword:
- cryo-EM
- cryo-ET
- cryo-SPA
- Structural Virology
- Poxvirus
- Vaccinia Virus
- Structural Biology
language:
- iso: eng
month: '12'
oa: 1
oa_version: Published Version
page: '106'
project:
- _id: 26736D6A-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: P31445
name: Structural conservation and diversity in retroviral capsid
publication_identifier:
isbn:
- 978-3-99078-049-7
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '12334'
relation: part_of_dissertation
status: public
- id: '14979'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Florian KM
full_name: Schur, Florian KM
id: 48AD8942-F248-11E8-B48F-1D18A9856A87
last_name: Schur
orcid: 0000-0003-4790-8078
title: Elucidating the structural determinants of the poxvirus core using multi-modal
cryo-EM
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
_id: '17373'
abstract:
- lang: eng
text: Scanning Kelvin probe microscopy (SKPM) is a powerful technique for investigating
the electrostatic properties of material surfaces, enabling the imaging of variations
in work function, topology, surface charge density, or combinations thereof. Regardless
of the underlying signal source, SKPM results in a voltage image, which is spatially
distorted due to the finite size of the probe, long-range electrostatic interactions,
mechanical and electrical noise, and the finite response time of the electronics.
In order to recover the underlying signal, it is necessary to deconvolve the measurement
with an appropriate point spread function (PSF) that accounts the aforementioned
distortions, but determining this PSF is difficult. Here, we describe how such
PSFs can be determined experimentally and show how they can be used to recover
the underlying information of interest. We first consider the physical principles
that enable SKPM and discuss how these affect the system PSF. We then show how
one can experimentally measure PSFs by looking at well-defined features, and that
these compare well to simulated PSFs, provided scans are performed extremely slowly
and carefully. Next, we work at realistic scan speeds and show that the idealized
PSFs fail to capture temporal distortions in the scan direction. While simulating
PSFs for these situations would be quite challenging, we show that measuring PSFs
with similar scan conditions works well. Our approach clarifies the basic principles
and inherent challenges to SKPM measurements and gives practical methods to improve
results.
acknowledged_ssus:
- _id: M-Shop
- _id: NanoFab
- _id: LifeSc
- _id: ScienComp
acknowledgement: This project has received funding from the European Research Council
(ERC) under the European Union’s Horizon 2020 research and innovation program (Grant
Agreement No. 949120). This research was supported by the Scientific Service Units
of the Institute of Science and Technology Austria (ISTA) through resources provided
by the Miba Machine Shop, Nanofabrication Facility, Scientific Computing Facility,
and Lab Support Facility. The authors wish to thank Dmytro Rak and Juan Carlos Sobarzo
for letting us use their equipment. The authors wish to thank the contributions
of the whole Waitukaitis Group for useful discussions and feedback.
article_number: '045305'
article_processing_charge: No
article_type: original
author:
- first_name: Isaac C
full_name: Lenton, Isaac C
id: a550210f-223c-11ec-8182-e2d45e817efb
last_name: Lenton
orcid: 0000-0002-5010-6984
- first_name: Felix
full_name: Pertl, Felix
id: 6313aec0-15b2-11ec-abd3-ed67d16139af
last_name: Pertl
orcid: 0000-0003-0463-5794
- first_name: Lubuna B
full_name: Shafeek, Lubuna B
id: 3CD37A82-F248-11E8-B48F-1D18A9856A87
last_name: Shafeek
orcid: 0000-0001-7180-6050
- first_name: Scott R
full_name: Waitukaitis, Scott R
id: 3A1FFC16-F248-11E8-B48F-1D18A9856A87
last_name: Waitukaitis
orcid: 0000-0002-2299-3176
citation:
ama: 'Lenton IC, Pertl F, Shafeek LB, Waitukaitis SR. Beyond the blur: Using experimentally
determined point spread functions to improve scanning Kelvin probe imaging. Journal
of Applied Physics. 2024;136(4). doi:10.1063/5.0215151'
apa: 'Lenton, I. C., Pertl, F., Shafeek, L. B., & Waitukaitis, S. R. (2024).
Beyond the blur: Using experimentally determined point spread functions to improve
scanning Kelvin probe imaging. Journal of Applied Physics. AIP Publishing.
https://doi.org/10.1063/5.0215151'
chicago: 'Lenton, Isaac C, Felix Pertl, Lubuna B Shafeek, and Scott R Waitukaitis.
“Beyond the Blur: Using Experimentally Determined Point Spread Functions to Improve
Scanning Kelvin Probe Imaging.” Journal of Applied Physics. AIP Publishing,
2024. https://doi.org/10.1063/5.0215151.'
ieee: 'I. C. Lenton, F. Pertl, L. B. Shafeek, and S. R. Waitukaitis, “Beyond the
blur: Using experimentally determined point spread functions to improve scanning
Kelvin probe imaging,” Journal of Applied Physics, vol. 136, no. 4. AIP
Publishing, 2024.'
ista: 'Lenton IC, Pertl F, Shafeek LB, Waitukaitis SR. 2024. Beyond the blur: Using
experimentally determined point spread functions to improve scanning Kelvin probe
imaging. Journal of Applied Physics. 136(4), 045305.'
mla: 'Lenton, Isaac C., et al. “Beyond the Blur: Using Experimentally Determined
Point Spread Functions to Improve Scanning Kelvin Probe Imaging.” Journal of
Applied Physics, vol. 136, no. 4, 045305, AIP Publishing, 2024, doi:10.1063/5.0215151.'
short: I.C. Lenton, F. Pertl, L.B. Shafeek, S.R. Waitukaitis, Journal of Applied
Physics 136 (2024).
corr_author: '1'
date_created: 2024-08-04T22:01:21Z
date_published: 2024-07-28T00:00:00Z
date_updated: 2025-09-08T08:47:42Z
day: '28'
ddc:
- '530'
department:
- _id: ScWa
- _id: NanoFab
doi: 10.1063/5.0215151
ec_funded: 1
external_id:
isi:
- '001281681100003'
file:
- access_level: open_access
checksum: 6141d05cd68d540a7446dce9490975db
content_type: application/pdf
creator: dernst
date_created: 2024-08-05T08:19:58Z
date_updated: 2024-08-05T08:19:58Z
file_id: '17386'
file_name: 2024_JourApplPhysics_Lenton.pdf
file_size: 2537502
relation: main_file
success: 1
file_date_updated: 2024-08-05T08:19:58Z
has_accepted_license: '1'
intvolume: ' 136'
isi: 1
issue: '4'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
project:
- _id: 0aa60e99-070f-11eb-9043-a6de6bdc3afa
call_identifier: H2020
grant_number: '949120'
name: 'Tribocharge: a multi-scale approach to an enduring problem in physics'
publication: Journal of Applied Physics
publication_identifier:
eissn:
- 1089-7550
issn:
- 0021-8979
publication_status: published
publisher: AIP Publishing
quality_controlled: '1'
scopus_import: '1'
status: public
title: 'Beyond the blur: Using experimentally determined point spread functions to
improve scanning Kelvin probe imaging'
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 136
year: '2024'
...
---
OA_place: publisher
_id: '17850'
abstract:
- lang: eng
text: "Understanding the relationship between a given phenotype and its underlying
genotype or genotypes is one of the most pressing challenges of biology, as it
lies at the heart of not only basic understanding of evolutionary theory, but
also of practical applications in medicine and bioengineering. Understanding this
relationship is complicated by the ubiquitous phenomenon of epistasis, wherein
mutation effects are dependent on their genetic context. Fitness landscapes —
representations of phenotype as a function of genotype — are being increasingly
used as a tool to study the effects and interactions of thousands of mutations,
but are experimentally limited to exploring a small fraction of a protein’s theoretical
sequence space. Furthermore, not all regions of said sequence space are necessarily
equally informative. Thus, gene selection for landscape surveys should be carefully
considered in order to maximize the usable output of necessarily limited data.\r\n\r\nIn
this work, we analyzed the fitness landscapes of orthologous green fluorescent
proteins from four different species, by systematically measuring the phenotype,
fluorescence, of tens of thousands of mutant genotypes from each protein. These
landscapes were highly heterogeneous, with some genes being mutationally robust
and displaying epistasis only rarely, and others being highly epistatic and mutationally
fragile. We used this data to train machine learning models to predict fluorescence
from genotype. Although the training data contained almost exclusively genotypes
with less than 3% sequence divergence from the original wild-type sequences, we
were able to create novel, functional genotypes with up to 20% sequence divergence.
Counterintuitively however, genes with high mutational robustness and rare epistasis
were more difficult to introduce large numbers of mutations into, not less. This
represents the first study of large-scale fitness landscapes of a protein family,
and provides insights into how to approach future landscape surveys and their
applications in novel protein design."
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Louisa
full_name: Gonzalez Somermeyer, Louisa
id: 4720D23C-F248-11E8-B48F-1D18A9856A87
last_name: Gonzalez Somermeyer
orcid: 0000-0001-9139-5383
citation:
ama: Gonzalez Somermeyer L. Fitness landscapes of orthologous green fluorescent
proteins. 2024. doi:10.15479/at:ista:17850
apa: Gonzalez Somermeyer, L. (2024). Fitness landscapes of orthologous green
fluorescent proteins. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:17850
chicago: Gonzalez Somermeyer, Louisa. “Fitness Landscapes of Orthologous Green Fluorescent
Proteins.” Institute of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:17850.
ieee: L. Gonzalez Somermeyer, “Fitness landscapes of orthologous green fluorescent
proteins,” Institute of Science and Technology Austria, 2024.
ista: Gonzalez Somermeyer L. 2024. Fitness landscapes of orthologous green fluorescent
proteins. Institute of Science and Technology Austria.
mla: Gonzalez Somermeyer, Louisa. Fitness Landscapes of Orthologous Green Fluorescent
Proteins. Institute of Science and Technology Austria, 2024, doi:10.15479/at:ista:17850.
short: L. Gonzalez Somermeyer, Fitness Landscapes of Orthologous Green Fluorescent
Proteins, Institute of Science and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-09-06T12:57:44Z
date_published: 2024-09-06T00:00:00Z
date_updated: 2026-04-07T13:25:01Z
day: '06'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: FyKo
doi: 10.15479/at:ista:17850
ec_funded: 1
file:
- access_level: open_access
checksum: d3303724e8d3c91321d71bbad4062048
content_type: application/pdf
creator: lgonzale
date_created: 2024-09-27T10:32:33Z
date_updated: 2024-09-27T10:32:33Z
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file_size: 11219837
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checksum: 22e63f7f9014dffde2af7a47e7d1d014
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: lgonzale
date_created: 2024-09-27T10:34:34Z
date_updated: 2024-09-27T10:34:34Z
file_id: '18152'
file_name: louisa_thesis_draft__240904b.docx
file_size: 43338677
relation: source_file
file_date_updated: 2024-09-27T10:34:34Z
has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: '89'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 26580278-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '771209'
name: Characterizing the fitness landscape on population and global scales
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
link:
- relation: software
url: https://github.com/aequorea238/Orthologous_GFP_Fitness_Peaks
record:
- id: '11448'
relation: part_of_dissertation
status: public
status: public
supervisor:
- first_name: Fyodor
full_name: Kondrashov, Fyodor
id: 44FDEF62-F248-11E8-B48F-1D18A9856A87
last_name: Kondrashov
orcid: 0000-0001-8243-4694
title: Fitness landscapes of orthologous green fluorescent proteins
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_place: publisher
OA_type: hybrid
_id: '17052'
abstract:
- lang: eng
text: Production of thermoelectric materials from solution-processed particles involves
the synthesis of particles, their purification and densification into pelletized
material. Chemical changes that occur during each one of these steps render them
performance determining. Particularly the purification steps, bypassed in conventional
solid-state synthesis, are the cause for large discrepancies among similar solution-processed
materials. In present work, the investigation focuses on a water-based surfactant
free solution synthesis of SnSe, a highly relevant thermoelectric material. We
show and rationalize that the number of leaching steps, purification solvent,
annealing, and annealing atmosphere have significant influence on the Sn : Se
ratio and impurity content in the powder. Such compositional changes that are
undetectable by conventional characterization techniques lead to distinct consolidated
materials with different types and concentration of defects. Additionally, the
profound effect on their transport properties is demonstrated. We emphasize that
understanding the chemistry and identifying key chemical species and their role
throughout the process is paramount for optimizing material performance. Furthermore,
we aim to demonstrate the necessity of comprehensive reporting of these steps
as a standard practice to ensure material reproducibility.
acknowledged_ssus:
- _id: EM-Fac
- _id: NMR
- _id: LifeSc
acknowledgement: ISTA and the Werner Siemens Foundation financially supported this
work. The Scientific Service Units (SSU) of ISTA supported this research through
resources provided by the Electron Microscopy Facility (EMF), NMR Facility and the
Lab Support Facility (LSF). Dr. Krishnendu Maji at ISTA aided in this work through
XRD analysis of the crystal phase of SnSe. Y.L. acknowledges funding from the European
Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie
grant agreement No. 754411, the National Natural Science Foundation of China (NSFC)
(Grants No. 22209034). M.C. received funding from the European Union's Horizon 2020
research and innovation program under the Marie Skłodowska-Curie Grant Agreement
No. 665385.
article_number: e202402628
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Christine
full_name: Fiedler, Christine
id: bd3fceba-dc74-11ea-a0a7-c17f71817366
last_name: Fiedler
- first_name: Mariano
full_name: Calcabrini, Mariano
id: 45D7531A-F248-11E8-B48F-1D18A9856A87
last_name: Calcabrini
orcid: 0000-0003-4566-5877
- first_name: Yu
full_name: Liu, Yu
id: 2A70014E-F248-11E8-B48F-1D18A9856A87
last_name: Liu
orcid: 0000-0001-7313-6740
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
citation:
ama: Fiedler C, Calcabrini M, Liu Y, Ibáñez M. Unveiling crucial chemical processing
parameters influencing the performance of solution-processed inorganic thermoelectric
materials. Angewandte Chemie International Edition. 2024;63(25). doi:10.1002/anie.202402628
apa: Fiedler, C., Calcabrini, M., Liu, Y., & Ibáñez, M. (2024). Unveiling crucial
chemical processing parameters influencing the performance of solution-processed
inorganic thermoelectric materials. Angewandte Chemie International Edition.
Wiley. https://doi.org/10.1002/anie.202402628
chicago: Fiedler, Christine, Mariano Calcabrini, Yu Liu, and Maria Ibáñez. “Unveiling
Crucial Chemical Processing Parameters Influencing the Performance of Solution-Processed
Inorganic Thermoelectric Materials.” Angewandte Chemie International Edition.
Wiley, 2024. https://doi.org/10.1002/anie.202402628.
ieee: C. Fiedler, M. Calcabrini, Y. Liu, and M. Ibáñez, “Unveiling crucial chemical
processing parameters influencing the performance of solution-processed inorganic
thermoelectric materials,” Angewandte Chemie International Edition, vol.
63, no. 25. Wiley, 2024.
ista: Fiedler C, Calcabrini M, Liu Y, Ibáñez M. 2024. Unveiling crucial chemical
processing parameters influencing the performance of solution-processed inorganic
thermoelectric materials. Angewandte Chemie International Edition. 63(25), e202402628.
mla: Fiedler, Christine, et al. “Unveiling Crucial Chemical Processing Parameters
Influencing the Performance of Solution-Processed Inorganic Thermoelectric Materials.”
Angewandte Chemie International Edition, vol. 63, no. 25, e202402628, Wiley,
2024, doi:10.1002/anie.202402628.
short: C. Fiedler, M. Calcabrini, Y. Liu, M. Ibáñez, Angewandte Chemie International
Edition 63 (2024).
corr_author: '1'
das_tickbox: '1'
date_created: 2024-05-26T22:00:58Z
date_published: 2024-06-17T00:00:00Z
date_updated: 2026-07-08T05:53:04Z
day: '17'
ddc:
- '540'
department:
- _id: MaIb
doi: 10.1002/anie.202402628
ec_funded: 1
external_id:
isi:
- '001223768400001'
pmid:
- '38623865'
file:
- access_level: open_access
checksum: 1572a0f4d2df55751761efeb2d11c7fc
content_type: application/pdf
creator: dernst
date_created: 2025-01-09T09:12:07Z
date_updated: 2025-01-09T09:12:07Z
file_id: '18797'
file_name: 2024_AngewChemieIntern_Fiedler.pdf
file_size: 16347226
relation: main_file
success: 1
file_date_updated: 2025-01-09T09:12:07Z
has_accepted_license: '1'
intvolume: ' 63'
isi: 1
issue: '25'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
pmid: 1
project:
- _id: 260C2330-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '754411'
name: ISTplus - Postdoctoral Fellowships
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A
name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of
Semiconductors for Waste Heat Recovery'
publication: Angewandte Chemie International Edition
publication_identifier:
eissn:
- 1521-3773
issn:
- 1433-7851
publication_status: published
publisher: Wiley
quality_controlled: '1'
scopus_import: '1'
status: public
title: Unveiling crucial chemical processing parameters influencing the performance
of solution-processed inorganic thermoelectric materials
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 63
year: '2024'
...
---
_id: '15182'
abstract:
- lang: eng
text: Thermoelectric materials convert heat into electricity, with a broad range
of applications near room temperature (RT). However, the library of RT high-performance
materials is limited. Traditional high-temperature synthetic methods constrain
the range of materials achievable, hindering the ability to surpass crystal structure
limitations and engineer defects. Here, a solution-based synthetic approach is
introduced, enabling RT synthesis of powders and exploration of densification
at lower temperatures to influence the material's microstructure. The approach
is exemplified by Ag2Se, an n-type alternative to bismuth telluride. It is demonstrated
that the concentration of Ag interstitials, grain boundaries, and dislocations
are directly correlated to the sintering temperature, and achieve a figure of
merit of 1.1 from RT to 100 °C after optimization. Moreover, insights into and
resolve Ag2Se's challenges are provided, including stoichiometry issues leading
to irreproducible performances. This work highlights the potential of RT solution
synthesis in expanding the repertoire of high-performance thermoelectric materials
for practical applications.
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
- _id: NanoFab
acknowledgement: This work was supported by the Scientific Service Units (SSU) of
ISTA through resources provided by the Electron Microscopy Facility (EMF), the Lab
Support Facility (LSF), and the Nanofabrication Facility (NNF). This work was financially
supported by ISTA and the Werner Siemens Foundation. The USTEM Service Unit of the
Technical University of Vienna is acknowledged for EBSD sample preparation and analysis.
R.L.B. acknowledges the National Science Foundation for funding the mass spectrometry
analysis under award DMR 1904719. J.L. is a Serra Húnter Fellow and is grateful
to the ICREA Academia program and projects MICINN/FEDER PID2021-124572OB-C31 and
GC 2021 SGR 01061.
article_number: '2400408'
article_processing_charge: Yes (via OA deal)
article_type: original
author:
- first_name: Tobias
full_name: Kleinhanns, Tobias
id: 8BD9DE16-AB3C-11E9-9C8C-2A03E6697425
last_name: Kleinhanns
orcid: 0000-0003-1537-7436
- first_name: Francesco
full_name: Milillo, Francesco
id: 38b830db-ea88-11ee-bf9b-929beaf79054
last_name: Milillo
- first_name: Mariano
full_name: Calcabrini, Mariano
id: 45D7531A-F248-11E8-B48F-1D18A9856A87
last_name: Calcabrini
orcid: 0000-0003-4566-5877
- first_name: Christine
full_name: Fiedler, Christine
id: bd3fceba-dc74-11ea-a0a7-c17f71817366
last_name: Fiedler
- first_name: Sharona
full_name: Horta, Sharona
id: 03a7e858-01b1-11ec-8b71-99ae6c4a05bc
last_name: Horta
- first_name: Daniel
full_name: Balazs, Daniel
id: 302BADF6-85FC-11EA-9E3B-B9493DDC885E
last_name: Balazs
orcid: 0000-0001-7597-043X
- first_name: Marissa J.
full_name: Strumolo, Marissa J.
last_name: Strumolo
- first_name: Roger
full_name: Hasler, Roger
last_name: Hasler
- first_name: Jordi
full_name: Llorca, Jordi
last_name: Llorca
- first_name: Michael
full_name: Tkadletz, Michael
last_name: Tkadletz
- first_name: Richard L.
full_name: Brutchey, Richard L.
last_name: Brutchey
- first_name: Maria
full_name: Ibáñez, Maria
id: 43C61214-F248-11E8-B48F-1D18A9856A87
last_name: Ibáñez
orcid: 0000-0001-5013-2843
citation:
ama: 'Kleinhanns T, Milillo F, Calcabrini M, et al. A route to high thermoelectric
performance: Solution‐based control of microstructure and composition in Ag2Se.
Advanced Energy Materials. 2024;14(22). doi:10.1002/aenm.202400408'
apa: 'Kleinhanns, T., Milillo, F., Calcabrini, M., Fiedler, C., Horta, S., Balazs,
D., … Ibáñez, M. (2024). A route to high thermoelectric performance: Solution‐based
control of microstructure and composition in Ag2Se. Advanced Energy Materials.
Wiley. https://doi.org/10.1002/aenm.202400408'
chicago: 'Kleinhanns, Tobias, Francesco Milillo, Mariano Calcabrini, Christine Fiedler,
Sharona Horta, Daniel Balazs, Marissa J. Strumolo, et al. “A Route to High Thermoelectric
Performance: Solution‐based Control of Microstructure and Composition in Ag2Se.”
Advanced Energy Materials. Wiley, 2024. https://doi.org/10.1002/aenm.202400408.'
ieee: 'T. Kleinhanns et al., “A route to high thermoelectric performance:
Solution‐based control of microstructure and composition in Ag2Se,” Advanced
Energy Materials, vol. 14, no. 22. Wiley, 2024.'
ista: 'Kleinhanns T, Milillo F, Calcabrini M, Fiedler C, Horta S, Balazs D, Strumolo
MJ, Hasler R, Llorca J, Tkadletz M, Brutchey RL, Ibáñez M. 2024. A route to high
thermoelectric performance: Solution‐based control of microstructure and composition
in Ag2Se. Advanced Energy Materials. 14(22), 2400408.'
mla: 'Kleinhanns, Tobias, et al. “A Route to High Thermoelectric Performance: Solution‐based
Control of Microstructure and Composition in Ag2Se.” Advanced Energy Materials,
vol. 14, no. 22, 2400408, Wiley, 2024, doi:10.1002/aenm.202400408.'
short: T. Kleinhanns, F. Milillo, M. Calcabrini, C. Fiedler, S. Horta, D. Balazs,
M.J. Strumolo, R. Hasler, J. Llorca, M. Tkadletz, R.L. Brutchey, M. Ibáñez, Advanced
Energy Materials 14 (2024).
corr_author: '1'
date_created: 2024-03-25T08:57:40Z
date_published: 2024-06-12T00:00:00Z
date_updated: 2026-07-17T07:09:41Z
day: '12'
ddc:
- '530'
department:
- _id: MaIb
- _id: LifeSc
doi: 10.1002/aenm.202400408
external_id:
isi:
- '001184300200001'
file:
- access_level: open_access
checksum: 86b26430e00d5f43ea19e9b610692ab7
content_type: application/pdf
creator: dernst
date_created: 2024-07-22T12:07:56Z
date_updated: 2024-07-22T12:07:56Z
file_id: '17314'
file_name: 2024_AdvancedEnergyMaterials_Kleinhanns.pdf
file_size: 8824301
relation: main_file
success: 1
file_date_updated: 2024-07-22T12:07:56Z
has_accepted_license: '1'
intvolume: ' 14'
isi: 1
issue: '22'
language:
- iso: eng
month: '06'
oa: 1
oa_version: Published Version
project:
- _id: 9B8F7476-BA93-11EA-9121-9846C619BF3A
name: 'HighTE: The Werner Siemens Laboratory for the High Throughput Discovery of
Semiconductors for Waste Heat Recovery'
publication: Advanced Energy Materials
publication_identifier:
eissn:
- 1614-6840
issn:
- 1614-6832
publication_status: published
publisher: Wiley
quality_controlled: '1'
related_material:
record:
- id: '22017'
relation: dissertation_contains
status: public
scopus_import: '1'
status: public
title: 'A route to high thermoelectric performance: Solution‐based control of microstructure
and composition in Ag2Se'
tmp:
image: /images/cc_by_nc_nd.png
legal_code_url: https://creativecommons.org/licenses/by-nc-nd/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
(CC BY-NC-ND 4.0)
short: CC BY-NC-ND (4.0)
type: journal_article
user_id: 317138e5-6ab7-11ef-aa6d-ffef3953e345
volume: 14
year: '2024'
...
---
OA_place: publisher
_id: '18477'
abstract:
- lang: eng
text: "ADAR1 is broadly expressed across various tissues and is vital in regulating
pathways\r\nassociated with innate immune responses. ADAR1 marks double-stranded
RNA as \"self\"\r\nthrough its A-to-I editing activity, effectively repressing
autoimmunity and maintaining\r\nimmune tolerance. This editing process has been
detected at millions of sites across the\r\nhuman genome. However, the mechanism
underlying ADAR1's substrate selectivity\r\nproperties remains largely unclear,
with much of the current knowledge derived from\r\ncomparisons to its more extensively
studied homolog, ADAR2. By studying ADAR1 in complex\r\nwith its RNA substrates
and applying a combination of biochemical techniques and structural\r\nstudies
using CryoEM, we aim to gain a more comprehensive understanding of the substrate\r\nselectivity
characteristics of ADAR1.\r\nIn this thesis, the purification protocol for ADAR1
was successfully optimized, resulting in the\r\nfirst report in the literature
to achieve high protein purity and activity. This advancement\r\nenabled the investigation
of complex formation between ADAR1 and various RNA substrates,\r\nleading to the
identification of optimal conditions for preparing the cryoEM sample. However,\r\ndespite
comprehensive optimization of the cryo-EM conditions, the resulting data lacked
the\r\ndesired quality, highlighting the need for similar rigorous optimization
of the RNA substrates\r\nto facilitate structural studies of the ADAR1-RNA complex.
The study was complemented by\r\nAlphaFold predictions, which provided some insights
into this mechanism.\r\nMoreover, during this project I established a collaboration
with a research group focused on\r\nstudying ADAR homologs. Notably ADAR homologs
were identified in bivalve species, and it\r\nwas further demonstrated that ADAR
and its A-to-I editing activity are upregulated in Pacific\r\noysters during infections
with Ostreid herpesvirus-1—a highly infectious virus that leads to\r\nsignificant
losses in oyster populations globally. I successfully purified oyster ADAR and\r\nprepared
in vitro edited RNA for nanopore sequencing—a direct sequencing technology\r\ncapable
of detecting modified nucleotides without the need for reverse transcription.
The\r\ncollaborators initiated optimization of this nanopore-based approach. However,
current\r\ntechnological limitations still constrain the reliable detection of
modified nucleotides.\r\nThe project also examined the impact of RNA editing on
RNA binding and filament formation\r\nby MDA5, a key cytosolic dsRNA sensor that
triggers an interferon response. A primary target\r\nof ADAR1's editing activity
is RNA derived from repetitive elements present in the genome,\r\nparticularly
Alu elements forming double-stranded RNA. When unedited, these RNA\r\nsequences
are recognized by MDA5. However, the mechanisms by which MDA5 interacts with\r\nAlu
RNAs, as well as the role of A-to-I editing in influencing this binding, are still
not well\r\nunderstood.\r\nThe interaction between MDA5 and Alu elements, was
successfully established. This was\r\nachieved through the testing of different
RNA variants and the evaluation of filament\r\nformation using binding techniques
and electron microscopy imaging. This groundwork has\r\nset the conditions for
further evaluation using CryoEM. Furthermore, the effects of A-to-I\r\nediting
on the binding properties of MDA5 with Alu RNA were investigated. Given the recent\r\nresearch
that has provided new insights into MDA5's interaction with dsRNA, it is essential
to\r\nrevise the experimental setup to integrate these findings before moving
forward with the\r\nCryoEM sample analysis."
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Beata M
full_name: Kaczmarek, Beata M
id: 36FA4AFA-F248-11E8-B48F-1D18A9856A87
last_name: Kaczmarek
citation:
ama: Kaczmarek BM. Biochemical and structural insights into ADAR1 RNA editing. 2024.
doi:10.15479/at:ista:18477
apa: Kaczmarek, B. M. (2024). Biochemical and structural insights into ADAR1
RNA editing. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:18477
chicago: Kaczmarek, Beata M. “Biochemical and Structural Insights into ADAR1 RNA
Editing.” Institute of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:18477.
ieee: B. M. Kaczmarek, “Biochemical and structural insights into ADAR1 RNA editing,”
Institute of Science and Technology Austria, 2024.
ista: Kaczmarek BM. 2024. Biochemical and structural insights into ADAR1 RNA editing.
Institute of Science and Technology Austria.
mla: Kaczmarek, Beata M. Biochemical and Structural Insights into ADAR1 RNA Editing.
Institute of Science and Technology Austria, 2024, doi:10.15479/at:ista:18477.
short: B.M. Kaczmarek, Biochemical and Structural Insights into ADAR1 RNA Editing,
Institute of Science and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-10-27T07:35:13Z
date_published: 2024-10-29T00:00:00Z
date_updated: 2026-04-07T13:23:59Z
day: '29'
ddc:
- '572'
degree_awarded: PhD
department:
- _id: GradSch
- _id: CaBe
doi: 10.15479/at:ista:18477
file:
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checksum: 2053294ea4d770c495e4cc501e2a218b
content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
creator: bkaczmar
date_created: 2024-10-29T11:56:36Z
date_updated: 2025-10-29T23:30:02Z
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file_id: '18485'
file_name: 20241029_PhD_thesis_BKaczmarek.docx
file_size: 23136626
relation: source_file
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checksum: 8ce857a4cd44b776791eaf180ac9dbb3
content_type: application/pdf
creator: bkaczmar
date_created: 2024-10-29T11:56:44Z
date_updated: 2025-10-29T23:30:02Z
embargo: 2025-10-29
file_id: '18486'
file_name: 20241029_PhD_thesis_BKaczmarek.pdf
file_size: 11707360
relation: main_file
file_date_updated: 2025-10-29T23:30:02Z
has_accepted_license: '1'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: '124'
publication_identifier:
isbn:
- 978-3-99078-045-9
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Carrie A
full_name: Bernecky, Carrie A
id: 2CB9DFE2-F248-11E8-B48F-1D18A9856A87
last_name: Bernecky
orcid: 0000-0003-0893-7036
title: Biochemical and structural insights into ADAR1 RNA editing
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_place: publisher
_id: '15352'
abstract:
- lang: eng
text: "Epilepsy affects about 50 to 65 million people globally. It summarizes a
spectrum of neurological\r\ndisorders that have in common a hyperactivity of the
neuronal network resulting in seizures. A common\r\nassumption is that an imbalance
between neuronal excitation and inhibition is a key mechanism in\r\nseizure generation
and epileptogeneisis. In at least one-third of the patients, current therapies
have\r\nproven unsuccessful in treating seizure progression. One potential reason
could be that the therapies\r\nonly focus on neurons. Recent studies suggest that
neuronal hyperactivity causes a microglial\r\nresponse, which reinstates brain
homeostasis. Additionally, interactions between microglia and neurons\r\nhave
been shown to inhibit neuronal firing and dampen seizure activity. However, the
exact relationship\r\nbetween microglia and seizure progression in epilepsy is
yet to be elucidated. A main bottleneck is that\r\nseveral studies investigate
microglia dynamics in ex vivo slice models, which can severely affect the\r\nmicroglia
dynamics due to their rapid response to environmental changes. On the other hand,
in vivo\r\nstudies focus mostly on behavior characterization of the epileptic
seizure phenotype and their long-term\r\nconsequences on microglia activity leaving
out the direct consequences of acute seizure activity on\r\nmicroglia dynamics.\r\nHere,
we perform a pilot study to combine electroencephalography (EEG) and in vivo live
imaging to\r\ndirectly monitor and correlate the onset of seizure activity with
microglia response. To induce seizures,\r\nwe take advantage of the kainic acid
(KA) model, which represents similar neuropathological and\r\nelectroencephalographic
features seen in human patients with temporal lobe epilepsy (TLE). After\r\nconfirmation
of induction of the seizure and microglia activity in the hippocampus as a focal
point, we\r\ninvestigated whether these changes also reached the primary visual
cortex (V1) as a secondary\r\ngeneralized seizure activity. Indeed, we found that
microglia changed their morphology at high doses\r\nof KA in the V1. Next, we
optimized each of the two methodological components: for the EEG recording,\r\nour
initial attempts under the microscope suffered from extensive electrical noise,
which overlaid the\r\nactual signal. Thus, we built a customized Faraday-cage
and confirmed that the signal-to-noise ratio\r\nwas sufficiently reduced to be
able to record brain oscillatory activity. For the in vivo live imaging of\r\nmicroglia,
we had to optimize the imaging parameters, so that we would be able to detect
microglial\r\nprocesses in a sufficient resolution to track their process changes.
Finally, we combined both\r\nmethodologies with the KA model. We confirmed that
KA induced seizure activity and found first\r\nindication that those correlate
with microglia volume changes.\r\nOverall, we have developed a first methodological
approach, which allows the analysis of the acute\r\neffects of seizure onset on
microglia. Future studies will have to continue to optimize the drift during\r\nimaging
recording and the post-image analysis. "
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: PreCl
alternative_title:
- ISTA Master's Thesis
article_processing_charge: No
author:
- first_name: Julie Stefanie
full_name: Murmann, Julie Stefanie
id: 1d390868-f128-11eb-9611-a0ca5f7833b5
last_name: Murmann
citation:
ama: 'Murmann JS. Investigating acute microglia response to seizure activity in
vivo: Combining 2-Photon imaging and EEG recording. 2024. doi:10.15479/at:ista:15352'
apa: 'Murmann, J. S. (2024). Investigating acute microglia response to seizure
activity in vivo: Combining 2-Photon imaging and EEG recording. Institute
of Science and Technology Austria. https://doi.org/10.15479/at:ista:15352'
chicago: 'Murmann, Julie Stefanie. “Investigating Acute Microglia Response to Seizure
Activity in Vivo: Combining 2-Photon Imaging and EEG Recording.” Institute of
Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:15352.'
ieee: 'J. S. Murmann, “Investigating acute microglia response to seizure activity
in vivo: Combining 2-Photon imaging and EEG recording,” Institute of Science and
Technology Austria, 2024.'
ista: 'Murmann JS. 2024. Investigating acute microglia response to seizure activity
in vivo: Combining 2-Photon imaging and EEG recording. Institute of Science and
Technology Austria.'
mla: 'Murmann, Julie Stefanie. Investigating Acute Microglia Response to Seizure
Activity in Vivo: Combining 2-Photon Imaging and EEG Recording. Institute
of Science and Technology Austria, 2024, doi:10.15479/at:ista:15352.'
short: 'J.S. Murmann, Investigating Acute Microglia Response to Seizure Activity
in Vivo: Combining 2-Photon Imaging and EEG Recording, Institute of Science and
Technology Austria, 2024.'
corr_author: '1'
date_created: 2024-05-02T08:31:38Z
date_published: 2024-05-02T00:00:00Z
date_updated: 2026-04-07T13:05:00Z
day: '02'
ddc:
- '570'
degree_awarded: MS
department:
- _id: SaSi
- _id: GradSch
doi: 10.15479/at:ista:15352
file:
- access_level: open_access
checksum: 095817a6c944954ac3f277e547031a33
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creator: cchlebak
date_created: 2024-05-02T12:26:13Z
date_updated: 2025-05-02T22:30:04Z
embargo: 2025-05-02
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language:
- iso: eng
month: '05'
oa: 1
oa_version: Published Version
page: '54'
publication_identifier:
issn:
- 2791-4585
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Sandra
full_name: Siegert, Sandra
id: 36ACD32E-F248-11E8-B48F-1D18A9856A87
last_name: Siegert
orcid: 0000-0001-8635-0877
title: 'Investigating acute microglia response to seizure activity in vivo: Combining
2-Photon imaging and EEG recording'
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_place: publisher
_id: '18471'
abstract:
- lang: eng
text: "Spatial omics technologies are enriching our understanding of complex biological
samples, by\r\nallowing us to study their molecular composition while preserving
the spatial relationships\r\nbetween molecules in their native context. As the
field continues to advance, there are\r\ntechnical challenges that need to be
addressed in order to take full advantage of the spatial\r\ncapabilities of these
methods. In this work, I present two technical developments that I\r\nestablished
for multiplexed error robust FISH (MERFISH) throughout my PhD: (1) pushing the\r\nspatial
resolution limits to the nanoscale, and (2) adding rich tissue context to the
mouse brain\r\ntranscriptome. To achieve nanoscale resolution with MERFISH in
cultured cells, I combined it\r\nwith stimulated emission depletion (STED) and
expansion microscopy (ExM) to achieve a\r\nspatial resolution as low as ~20 nm,
and explored the compatibility of MERFISH with singlemolecule localization microscopy
(SMLM) techniques. To visualize targeted mRNAs in mouse\r\nbrain tissue, I applied
the comprehensive analysis of tissues across scales (CATS) toolbox, which\r\nprovides
an unbiased morphological readout by labeling the extracellular domain. I\r\nsuccessfully
established this method, which we call CATS-MERFISH-ExM, to work with thick\r\nmouse
brain slices, being able to extract transcriptomics information with 3D tissue
context.\r\nCATS-MERFISH-ExM enabled us to identify cell types and further visualize
the subcellular\r\ndistribution of transcripts in mouse brain tissue, shedding
light on the neuropil-specific\r\ntranscriptome. This method provides integrated
information on cellular structure and\r\ntranscriptomes in situ, and could potentially
be applied with other modalities, opening new\r\navenues for scientific discovery. "
acknowledged_ssus:
- _id: Bio
- _id: LifeSc
- _id: PreCl
- _id: M-Shop
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Nathalie
full_name: Agudelo Duenas, Nathalie
id: 40E7F008-F248-11E8-B48F-1D18A9856A87
last_name: Agudelo Duenas
citation:
ama: Agudelo Duenas N. Visualizing the neuronal transcriptional landscape with tissue
context. 2024. doi:10.15479/at:ista:18471
apa: Agudelo Duenas, N. (2024). Visualizing the neuronal transcriptional landscape
with tissue context. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:18471
chicago: Agudelo Duenas, Nathalie. “Visualizing the Neuronal Transcriptional Landscape
with Tissue Context.” Institute of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:18471.
ieee: N. Agudelo Duenas, “Visualizing the neuronal transcriptional landscape with
tissue context,” Institute of Science and Technology Austria, 2024.
ista: Agudelo Duenas N. 2024. Visualizing the neuronal transcriptional landscape
with tissue context. Institute of Science and Technology Austria.
mla: Agudelo Duenas, Nathalie. Visualizing the Neuronal Transcriptional Landscape
with Tissue Context. Institute of Science and Technology Austria, 2024, doi:10.15479/at:ista:18471.
short: N. Agudelo Duenas, Visualizing the Neuronal Transcriptional Landscape with
Tissue Context, Institute of Science and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-10-26T20:02:42Z
date_published: 2024-10-28T00:00:00Z
date_updated: 2026-04-14T08:34:37Z
day: '28'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: JoDa
doi: 10.15479/at:ista:18471
ec_funded: 1
file:
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has_accepted_license: '1'
language:
- iso: eng
month: '10'
oa: 1
oa_version: Published Version
page: '97'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 2548AE96-B435-11E9-9278-68D0E5697425
call_identifier: FWF
grant_number: W1232
name: Molecular Drug Targets
publication_identifier:
isbn:
- 978-3-99078-044-2
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Johann G
full_name: Danzl, Johann G
id: 42EFD3B6-F248-11E8-B48F-1D18A9856A87
last_name: Danzl
orcid: 0000-0001-8559-3973
title: Visualizing the neuronal transcriptional landscape with tissue context
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_embargo: '12'
OA_place: publisher
_id: '18574'
abstract:
- lang: eng
text: "Biological vision is unlike a camera; rather than transmitting light information
faithfully, early\r\nvisual circuits process the visual scene to convey only the
relevant information in an efficient\r\nmanner. Consequentially, the nature of
this visual processing then depends on what is the\r\nrelevant information in
a scene and on the notion of efficiency. In this work, I study how visual\r\nprocessing
is modulated by two different variations in the visual scene. First, I discovered
that\r\nin the mouse (Mus musculus) retina, Retinal Ganglion Cells in the upper
and lower visual\r\nfield have differences in the center surround structure of
their receptive fields. Comparison\r\nwith models of efficient coding show that
this adaptation likely evolved to cope with the\r\nbrightness gradient from the
sky to the ground that is pervasive in natural scenes. In the\r\nsecond project,
I study how the downstream neurons in the Superior Colliculus dynamically\r\nchange
their temporal selectivity depending on the ambient luminance and behavioral state.\r\nAs
the scene gets darker or when the animal is is less aroused, the neuronal responses
get\r\nlaggier, while still maintaining their relative timing with respect to
the population. Overall, this\r\nwork emphasises the need to understand visual
processing in the context of specific demands\r\nof the animal in its the environment.
The adaptive changes in the visual system, from the\r\nretinal ganglion cells
to the superior colliculus, highlight the intricate ways in which biological\r\nvision
optimizes the processing of visual information.\r\n"
acknowledged_ssus:
- _id: Bio
- _id: ScienComp
- _id: PreCl
- _id: LifeSc
- _id: M-Shop
- _id: E-Lib
acknowledgement: "This work would have been impossible without the Scientific Service
Units of IST Austria. The resources and expertise provided by Scientific Computing
(especially Alois Schlögl), the MIBA Machine Shop (especially Todor Asenov), the
Preclinical Facility (especially Freyja Langer), the Library, the Lab Support Facility
and the Imaging and Optics Facility were the essential bedrock I could build upon.
I would also like to thank IT support at ISTA for powering through remote work and
a cyberattack.\r\nI am grateful for having been funded initially by the European
Union Horizon 2020 Marie Skłodowska-Curie grant 665385 and later by Prof. Maximilian
Joesch's the European Research Council Starting (756502) and Consolidator (101086580)
Grants."
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Divyansh
full_name: Gupta, Divyansh
id: 2A485EBE-F248-11E8-B48F-1D18A9856A87
last_name: Gupta
orcid: 0000-0001-7400-6665
citation:
ama: Gupta D. Visual adaptations to natural statistics. 2024. doi:10.15479/at:ista:18574
apa: Gupta, D. (2024). Visual adaptations to natural statistics. Institute
of Science and Technology Austria. https://doi.org/10.15479/at:ista:18574
chicago: Gupta, Divyansh. “Visual Adaptations to Natural Statistics.” Institute
of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:18574.
ieee: D. Gupta, “Visual adaptations to natural statistics,” Institute of Science
and Technology Austria, 2024.
ista: Gupta D. 2024. Visual adaptations to natural statistics. Institute of Science
and Technology Austria.
mla: Gupta, Divyansh. Visual Adaptations to Natural Statistics. Institute
of Science and Technology Austria, 2024, doi:10.15479/at:ista:18574.
short: D. Gupta, Visual Adaptations to Natural Statistics, Institute of Science
and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-11-20T21:30:44Z
date_published: 2024-11-22T00:00:00Z
date_updated: 2026-04-07T13:24:48Z
day: '22'
ddc:
- '573'
degree_awarded: PhD
department:
- _id: GradSch
- _id: MaJö
doi: 10.15479/at:ista:18574
ec_funded: 1
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date_created: 2024-11-25T14:44:03Z
date_updated: 2025-11-11T23:30:02Z
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file_date_updated: 2025-11-11T23:30:02Z
has_accepted_license: '1'
language:
- iso: eng
license: https://creativecommons.org/licenses/by-nc-sa/4.0/
month: '11'
oa: 1
oa_version: Published Version
page: '86'
project:
- _id: bdaf81a8-d553-11ed-ba76-c95961984540
grant_number: '101086580'
name: 'Action Selection in the Midbrain: Neuromodulation of Visuomotor Senses'
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 2634E9D2-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '756502'
name: Circuits of Visual Attention
publication_identifier:
isbn:
- 978-3-99078-050-3
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
related_material:
record:
- id: '12349'
relation: part_of_dissertation
status: public
- id: '12370'
relation: research_data
status: public
status: public
supervisor:
- first_name: Maximilian A
full_name: Jösch, Maximilian A
id: 2BD278E6-F248-11E8-B48F-1D18A9856A87
last_name: Jösch
orcid: 0000-0002-3937-1330
title: Visual adaptations to natural statistics
tmp:
image: /images/cc_by_nc_sa.png
legal_code_url: https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode
name: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC
BY-NC-SA 4.0)
short: CC BY-NC-SA (4.0)
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
_id: '15323'
abstract:
- lang: eng
text: Supercomplexes of the respiratory chain are established constituents of the
oxidative phosphorylation system, but their role in mammalian metabolism has been
hotly debated. Although recent studies have shown that different tissues/organs
are equipped with specific sets of supercomplexes, depending on their metabolic
needs, the notion that supercomplexes have a role in the regulation of metabolism
has been challenged. However, irrespective of the mechanistic conclusions, the
composition of various high molecular weight supercomplexes remains uncertain.
Here, using cryogenic electron microscopy, we demonstrate that mammalian (mouse)
tissues contain three defined types of ‘respirasome’, supercomplexes made of CI,
CIII2 and CIV. The stoichiometry and position of CIV differs in the three respirasomes,
of which only one contains the supercomplex-associated factor SCAF1, whose involvement
in respirasome formation has long been contended. Our structures confirm that
the ‘canonical’ respirasome (the C-respirasome, CICIII2CIV) does not contain SCAF1,
which is instead associated to a different respirasome (the CS-respirasome), containing
a second copy of CIV. We also identify an alternative respirasome (A-respirasome),
with CIV bound to the ‘back’ of CI, instead of the ‘toe’. This structural characterization
of mouse mitochondrial supercomplexes allows us to hypothesize a mechanistic basis
for their specific role in different metabolic conditions.
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
- _id: PreCl
- _id: ScienComp
acknowledgement: Supercomplexes of the respiratory chain are established constituents
of the oxidative phosphorylation system, but their role in mammalian metabolism
has been hotly debated. Although recent studies have shown that different tissues/organs
are equipped with specific sets of supercomplexes, depending on their metabolic
needs, the notion that supercomplexes have a role in the regulation of metabolism
has been challenged. However, irrespective of the mechanistic conclusions, the composition
of various high molecular weight supercomplexes remains uncertain. Here, using cryogenic
electron microscopy, we demonstrate that mammalian (mouse) tissues contain three
defined types of ‘respirasome’, supercomplexes made of CI, CIII2 and CIV. The stoichiometry
and position of CIV differs in the three respirasomes, of which only one contains
the supercomplex-associated factor SCAF1, whose involvement in respirasome formation
has long been contended. Our structures confirm that the ‘canonical’ respirasome
(the C-respirasome, CICIII2CIV) does not contain SCAF1, which is instead associated
to a different respirasome (the CS-respirasome), containing a second copy of CIV.
We also identify an alternative respirasome (A-respirasome), with CIV bound to the
‘back’ of CI, instead of the ‘toe’. This structural characterization of mouse mitochondrial
supercomplexes allows us to hypothesize a mechanistic basis for their specific role
in different metabolic conditions.
article_processing_charge: No
article_type: original
author:
- first_name: Irene
full_name: Vercellino, Irene
id: 3ED6AF16-F248-11E8-B48F-1D18A9856A87
last_name: Vercellino
orcid: 0000-0001-5618-3449
- first_name: Leonid A
full_name: Sazanov, Leonid A
id: 338D39FE-F248-11E8-B48F-1D18A9856A87
last_name: Sazanov
orcid: 0000-0002-0977-7989
citation:
ama: Vercellino I, Sazanov LA. SCAF1 drives the compositional diversity of mammalian
respirasomes. Nature Structural and Molecular Biology. 2024;31:1061-1071.
doi:10.1038/s41594-024-01255-0
apa: Vercellino, I., & Sazanov, L. A. (2024). SCAF1 drives the compositional
diversity of mammalian respirasomes. Nature Structural and Molecular Biology.
Springer Nature. https://doi.org/10.1038/s41594-024-01255-0
chicago: Vercellino, Irene, and Leonid A Sazanov. “SCAF1 Drives the Compositional
Diversity of Mammalian Respirasomes.” Nature Structural and Molecular Biology.
Springer Nature, 2024. https://doi.org/10.1038/s41594-024-01255-0.
ieee: I. Vercellino and L. A. Sazanov, “SCAF1 drives the compositional diversity
of mammalian respirasomes,” Nature Structural and Molecular Biology, vol.
31. Springer Nature, pp. 1061–1071, 2024.
ista: Vercellino I, Sazanov LA. 2024. SCAF1 drives the compositional diversity of
mammalian respirasomes. Nature Structural and Molecular Biology. 31, 1061–1071.
mla: Vercellino, Irene, and Leonid A. Sazanov. “SCAF1 Drives the Compositional Diversity
of Mammalian Respirasomes.” Nature Structural and Molecular Biology, vol.
31, Springer Nature, 2024, pp. 1061–71, doi:10.1038/s41594-024-01255-0.
short: I. Vercellino, L.A. Sazanov, Nature Structural and Molecular Biology 31 (2024)
1061–1071.
corr_author: '1'
date_created: 2024-04-14T22:01:03Z
date_published: 2024-07-01T00:00:00Z
date_updated: 2025-11-24T08:35:04Z
day: '01'
ddc:
- '572'
department:
- _id: LeSa
doi: 10.1038/s41594-024-01255-0
ec_funded: 1
external_id:
isi:
- '001196897300001'
pmid:
- '38575788'
file:
- access_level: open_access
checksum: 21f05d188762acd7f49a97f3d09c8d9f
content_type: application/pdf
creator: lsazanov
date_created: 2024-05-14T11:57:56Z
date_updated: 2025-01-01T23:30:03Z
embargo: 2025-01-01
file_id: '15392'
file_name: megacomplex_submit_NSMB_withFigures.pdf
file_size: 24424729
relation: main_file
file_date_updated: 2025-01-01T23:30:03Z
has_accepted_license: '1'
intvolume: ' 31'
isi: 1
language:
- iso: eng
month: '07'
oa: 1
oa_version: Submitted Version
page: 1061-1071
pmid: 1
project:
- _id: 627abdeb-2b32-11ec-9570-ec31a97243d3
call_identifier: H2020
grant_number: '101020697'
name: Structure and mechanism of respiratory chain molecular machines
publication: Nature Structural and Molecular Biology
publication_identifier:
eissn:
- 1545-9985
issn:
- 1545-9993
publication_status: published
publisher: Springer Nature
quality_controlled: '1'
related_material:
link:
- relation: erratum
url: https://doi.org/10.1038/s41594-025-01721-3
scopus_import: '1'
status: public
title: SCAF1 drives the compositional diversity of mammalian respirasomes
tmp:
image: /images/cc_by.png
legal_code_url: https://creativecommons.org/licenses/by/4.0/legalcode
name: Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)
short: CC BY (4.0)
type: journal_article
user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87
volume: 31
year: '2024'
...
---
OA_place: publisher
_id: '18101'
abstract:
- lang: eng
text: "The Retroviridae family consists of two sub-families, the Orthoretrovirinae
and the\r\nSpumaretrovirinae. The Orthoretroviruses contain important human pathogens,
such as the\r\nhuman immunodeficiency virus 1 (HIV-1). They also harbor other
retrovirus species which\r\nare regularly used as model systems to study the retroviral
life cycle. The main structural\r\ncomponent of the retroviruses, is the Gag protein
and its truncation derivatives occurring\r\nduring viral maturation. Orthoretroviral
Gag assemblies have been extensively studied to\r\nunderstand the interactions
that confer stability and morphology to viral particles.\r\nThe Spumaretrovirinae
subfamily represent an early diverging branch of the Retroviridae.\r\nIts members,
the Foamy viruses (FV), share most of the conventional features found in\r\nretroviruses.
However, they also possess multiple characteristics that make them unique. In\r\nparticular,
FV Gag does not get extensively cleaved as in orthoretroviruses. Hence, the Gag\r\narchitecture
deviates from the canonical domain arrangement in FV. They also exhibit a\r\npeculiar
particle morphology, having no apparent immature state and a seemingly\r\nicosahedral
mature particle. Due to this, many fundamental questions on FV structural\r\nassembly
mechanisms remain open. To answer these questions, was the main focus of this\r\nthesis.\r\nMainly,
it is not known how FV assemble their core in a virus particle and what are the\r\nimportant
assembly interaction sites within said core. What is the minimum assembly\r\ncompetent
domain of FV Gag? Is there a morphological change in the assembly type of FVGag
lattices? If so, what is defining these morphological shifts? Finally, it would
be\r\ninteresting to know what is the evolutionary relationship between FV and
the rest of the\r\nretrotranscribing elements, from a structural point of view?\r\nTo
answer these questions, membrane-enveloped mammalian cell-derived FV virus-like\r\nparticles
(VLPs) were produced. Cryo-electron tomography (cryo-ET) analysis suggested\r\nthese
FV VLPs do not form a canonical retroviral Gag lattice structure, which is in
line with\r\nearlier observations. To further evaluate FV Gag assembly competence
and morphology,\r\nthe first bacterial cell-derived in vitro VLP assembly system
was designed and optimized.\r\nUsing this system with different truncation variants,
the minimum assembly competent\r\ndomain of FV Gag was found to be the putative
CA300-477 domain. Varying VLP\r\nmorphologies were also observed and strongly
suggested residues upstream of CA300-477\r\nplay a role in morphology determination.
Finally, a combined cryo-electron microscopy (cryoEM) and cryo-ET approach was
taken to analyze tubular assemblies from the minimal\r\nassembly competent domain.
This revealed an unexpectedly unique non-canonical\r\nassembly architecture. Three
novel lattice stabilizing interfaces were described which\r\nproved to be as unique
as the lattice arrangement. Comparison to a newly published FV CA\r\ncore structure
revealed the CA-CA interactions in the atypical assembly do not recapitulate\r\nwhat
is described for the FV core lattice. However, the new in vitro VLP assembly system\r\nobtained
in this thesis also provides an exciting opportunity to study still unresolved
FV\r\nassembly features in a potentially facilitated approach compared to conventional
methods.\r\nIn summary, this work provided a deeper understanding of the basic
FV Gag assembly unit,\r\nas well as presenting the first FV Gag-derived in vitro
VLP assembly system. This system\r\nreveals a novel and unique assembly architecture
among retroviral in vitro assemblies."
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
- _id: ScienComp
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Dario J
full_name: Porley, Dario J
id: 2FD6EA6C-F248-11E8-B48F-1D18A9856A87
last_name: Porley
citation:
ama: Porley Esteves D. Structural characterization of spumavirus capsid assemblies.
2024. doi:10.15479/at:ista:18101
apa: Porley Esteves, D. (2024). Structural characterization of spumavirus capsid
assemblies. Institute of Science and Technology Austria. https://doi.org/10.15479/at:ista:18101
chicago: Porley Esteves, Darío. “Structural Characterization of Spumavirus Capsid
Assemblies.” Institute of Science and Technology Austria, 2024. https://doi.org/10.15479/at:ista:18101.
ieee: D. Porley Esteves, “Structural characterization of spumavirus capsid assemblies,”
Institute of Science and Technology Austria, 2024.
ista: Porley Esteves D. 2024. Structural characterization of spumavirus capsid assemblies.
Institute of Science and Technology Austria.
mla: Porley Esteves, Darío. Structural Characterization of Spumavirus Capsid
Assemblies. Institute of Science and Technology Austria, 2024, doi:10.15479/at:ista:18101.
short: D. Porley Esteves, Structural Characterization of Spumavirus Capsid Assemblies,
Institute of Science and Technology Austria, 2024.
corr_author: '1'
date_created: 2024-09-20T10:21:03Z
date_published: 2024-09-26T00:00:00Z
date_updated: 2026-04-07T13:21:01Z
day: '26'
ddc:
- '570'
degree_awarded: PhD
department:
- _id: GradSch
- _id: FlSc
doi: 10.15479/at:ista:18101
ec_funded: 1
file:
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creator: dporley
date_created: 2024-09-26T13:40:33Z
date_updated: 2025-03-25T23:30:03Z
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has_accepted_license: '1'
language:
- iso: eng
month: '09'
oa: 1
oa_version: Published Version
page: '131'
project:
- _id: 2564DBCA-B435-11E9-9278-68D0E5697425
call_identifier: H2020
grant_number: '665385'
name: International IST Doctoral Program
- _id: 9B9C98E0-BA93-11EA-9121-9846C619BF3A
grant_number: '25762'
name: Structural characterization of spumavirus capsid assemblies to understand
conserved Ortervirales assembly mechanisms
publication_identifier:
isbn:
- 978-3-99078-041-1
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Florian KM
full_name: Schur, Florian KM
id: 48AD8942-F248-11E8-B48F-1D18A9856A87
last_name: Schur
orcid: 0000-0003-4790-8078
title: Structural characterization of spumavirus capsid assemblies
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...
---
OA_place: publisher
_id: '17319'
abstract:
- lang: eng
text: "This thesis comprises two distinct projects, each offering unique insights
into fundamental\r\ncellular processes. While distinct in their focus, these different
perspectives have a common\r\ntheme: chemiosmotic theory and utilisation of the
proton gradient for driving the essential\r\nprocesses like auxin efflux and ATP
synthesis, effectively bridging the membrane protein\r\nstructure and function
from the realms of plant biology and cellular bioenergetics.\r\nThe first project
of this thesis centres on the characterisation of PIN proteins, a class of\r\ntransmembrane
transporters pivotal in the regulation of auxin transport and distribution in\r\nplants.
PINs form a conserved and phylogenetically abundant group of transporters present
in\r\nland plants and certain algae. Despite their great importance, they were
one of the few elusive\r\nproteins essential for plant development not to be structurally
and mechanistically\r\ncharacterised since their discovery almost 30 years ago.
This work aimed to uncover the\r\nstructural and functional dynamics of the PIN
protein-mediated auxin transport using an array\r\nof experimental techniques,
including protein purification, biochemical assays and structural\r\nanalysis.
Through an exhaustive screening process that took several years and included testing\r\ndifferent
PIN homologues, expression systems, constructs, and purification conditions, we\r\ndeveloped
a robust protocol for isolating the pure, stable, and monodisperse PIN8 protein.\r\nMoreover,
utilising biophysical methods and buffer screening, we demonstrated that PIN8\r\nexhibits
detergent and pH-dependent stability, with mild detergents and lower pH (5.0 and
6.0)\r\nbeing optimal for the stability of the protein. Using SEC-MALS and crosslinking,
we\r\ndetermined that PIN8 forms dimers, which was confirmed by our structural
studies. We\r\nobtained a cryo-EM map of PIN8 at pH 6.0, and, compared to recently
published structures,\r\nour map implies major pH-dependent conformational changes
and possibly utilisation of the\r\nproton gradient in the transport mechanism.\r\nThe
subject of the second project was F1Fo-ATP synthase, an enzyme complex fundamental\r\nto
cellular energy metabolism. Through an approach integrating biochemical assays
and\r\nstructural analysis, this research aimed to unveil the molecular mechanism
of inhibition of ATP\r\nsynthase by yaku´amide, a bioactive compound with potential
therapeutic implications. Using\r\nsubmitochondrial particles and purified F1Fo-ATP
synthase, we demonstrated that, contrary to\r\npublished data, yaku´amide inhibits
both ATP hydrolysis and ATP synthesis reactions.\r\nMoreover, we found that yaku´amide
inhibitory activity is proton motive force (pmf)\r\ndependent, with lower inhibition
in a more coupled system. Utilising cryo-EM, we obtained\r\nmaps and models for
the three main rotational states of murine ATP synthase (State 1 at 3.0 Å,\r\n8\r\nState
2 at 3.1 Å, and State 3 at 3.2 Å, overall). We observed several new features in
our maps;\r\nhowever, we cannot definitively determine the exact mechanism of
yaku amide’s inhibition on\r\nthe protein due to either resolution limits or suboptimal
binding of the inhibitor."
acknowledged_ssus:
- _id: EM-Fac
- _id: LifeSc
alternative_title:
- ISTA Thesis
article_processing_charge: No
author:
- first_name: Kristina
full_name: Lukic, Kristina
id: 2B04DB84-F248-11E8-B48F-1D18A9856A87
last_name: Lukic
orcid: 0000-0003-1581-881X
citation:
ama: 'Lukic K. Membrane proteins in plant physiology and bioenergetics : Investigating
auxin efflux transporter PIN8 and ATP synthase inhibition by the novel inhibitor
Yaku’amide B. 2024. doi:10.15479/at:ista:17319'
apa: 'Lukic, K. (2024). Membrane proteins in plant physiology and bioenergetics :
Investigating auxin efflux transporter PIN8 and ATP synthase inhibition by the
novel inhibitor Yaku’amide B. Institute of Science and Technology Austria.
https://doi.org/10.15479/at:ista:17319'
chicago: 'Lukic, Kristina. “Membrane Proteins in Plant Physiology and Bioenergetics :
Investigating Auxin Efflux Transporter PIN8 and ATP Synthase Inhibition by the
Novel Inhibitor Yaku’amide B.” Institute of Science and Technology Austria, 2024.
https://doi.org/10.15479/at:ista:17319.'
ieee: 'K. Lukic, “Membrane proteins in plant physiology and bioenergetics : Investigating
auxin efflux transporter PIN8 and ATP synthase inhibition by the novel inhibitor
Yaku’amide B,” Institute of Science and Technology Austria, 2024.'
ista: 'Lukic K. 2024. Membrane proteins in plant physiology and bioenergetics :
Investigating auxin efflux transporter PIN8 and ATP synthase inhibition by the
novel inhibitor Yaku’amide B. Institute of Science and Technology Austria.'
mla: 'Lukic, Kristina. Membrane Proteins in Plant Physiology and Bioenergetics :
Investigating Auxin Efflux Transporter PIN8 and ATP Synthase Inhibition by the
Novel Inhibitor Yaku’amide B. Institute of Science and Technology Austria,
2024, doi:10.15479/at:ista:17319.'
short: 'K. Lukic, Membrane Proteins in Plant Physiology and Bioenergetics : Investigating
Auxin Efflux Transporter PIN8 and ATP Synthase Inhibition by the Novel Inhibitor
Yaku’amide B, Institute of Science and Technology Austria, 2024.'
corr_author: '1'
date_created: 2024-07-26T09:05:55Z
date_published: 2024-07-26T00:00:00Z
date_updated: 2026-04-07T13:20:44Z
day: '26'
ddc:
- '580'
degree_awarded: PhD
department:
- _id: LeSa
- _id: GradSch
doi: 10.15479/at:ista:17319
file:
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creator: cchlebak
date_created: 2024-07-26T13:14:24Z
date_updated: 2025-01-26T23:30:04Z
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has_accepted_license: '1'
language:
- iso: eng
month: '07'
oa: 1
oa_version: Published Version
page: '224'
publication_identifier:
issn:
- 2663-337X
publication_status: published
publisher: Institute of Science and Technology Austria
status: public
supervisor:
- first_name: Leonid A
full_name: Sazanov, Leonid A
id: 338D39FE-F248-11E8-B48F-1D18A9856A87
last_name: Sazanov
orcid: 0000-0002-0977-7989
title: 'Membrane proteins in plant physiology and bioenergetics : Investigating auxin
efflux transporter PIN8 and ATP synthase inhibition by the novel inhibitor Yaku''amide
B'
type: dissertation
user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd
year: '2024'
...