--- OA_place: publisher _id: '8340' abstract: - lang: eng text: Mitochondria are sites of oxidative phosphorylation in eukaryotic cells. Oxidative phosphorylation operates by a chemiosmotic mechanism made possible by redox-driven proton pumping machines which establish a proton motive force across the inner mitochondrial membrane. This electrochemical proton gradient is used to drive ATP synthesis, which powers the majority of cellular processes such as protein synthesis, locomotion and signalling. In this thesis I investigate the structures and molecular mechanisms of two inner mitochondrial proton pumping enzymes, respiratory complex I and transhydrogenase. I present the first high-resolution structure of the full transhydrogenase from any species, and a significantly improved structure of complex I. Improving the resolution from 3.3 Å available previously to up to 2.3 Å in this thesis allowed us to model bound water molecules, crucial in the proton pumping mechanism. For both enzymes, up to five cryo-EM datasets with different substrates and inhibitors bound were solved to delineate the catalytic cycle and understand the proton pumping mechanism. In transhydrogenase, the proton channel is gated by reversible detachment of the NADP(H)-binding domain which opens the proton channel to the opposite sites of the membrane. In complex I, the proton channels are gated by reversible protonation of key glutamate and lysine residues and breaking of the water wire connecting the proton pumps with the quinone reduction site. The tight coupling between the redox and the proton pumping reactions in transhydrogenase is achieved by controlling the NADP(H) exchange which can only happen when the NADP(H)-binding domain interacts with the membrane domain. In complex I, coupling is achieved by cycling of the whole complex between the closed state, in which quinone can get reduced, and the open state, in which NADH can induce quinol ejection from the binding pocket. On the basis of these results I propose detailed mechanisms for catalytic cycles of transhydrogenase and complex I that are consistent with a large amount of previous work. In both enzymes, conformational and electrostatic mechanisms contribute to the overall catalytic process. Results presented here could be used for better understanding of the human pathologies arising from deficiencies of complex I or transhydrogenase and could be used to develop novel therapies. acknowledged_ssus: - _id: EM-Fac acknowledgement: 'I acknowledge the support of IST facilities, especially the Electron Miscroscopy facility for providing training and resources. Special thanks also go to cryo-EM specialists who helped me to collect the data present here: Dr Valentin Hodirnau (IST Austria), Dr Tom Heuser (IMBA, Vienna), Dr Rebecca Thompson (Uni. of Leeds) and Dr Jirka Nováček (CEITEC). This work has been supported by iNEXT, project number 653706, funded by the Horizon 2020 programme of the European Union. This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 665385.' alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Domen full_name: Kampjut, Domen id: 37233050-F248-11E8-B48F-1D18A9856A87 last_name: Kampjut orcid: 0000-0002-6018-3422 citation: ama: Kampjut D. Molecular mechanisms of mitochondrial redox-coupled proton pumping enzymes. 2020. doi:10.15479/AT:ISTA:8340 apa: Kampjut, D. (2020). Molecular mechanisms of mitochondrial redox-coupled proton pumping enzymes. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8340 chicago: Kampjut, Domen. “Molecular Mechanisms of Mitochondrial Redox-Coupled Proton Pumping Enzymes.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8340. ieee: D. Kampjut, “Molecular mechanisms of mitochondrial redox-coupled proton pumping enzymes,” Institute of Science and Technology Austria, 2020. ista: Kampjut D. 2020. Molecular mechanisms of mitochondrial redox-coupled proton pumping enzymes. Institute of Science and Technology Austria. mla: Kampjut, Domen. Molecular Mechanisms of Mitochondrial Redox-Coupled Proton Pumping Enzymes. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8340. short: D. Kampjut, Molecular Mechanisms of Mitochondrial Redox-Coupled Proton Pumping Enzymes, Institute of Science and Technology Austria, 2020. corr_author: '1' date_created: 2020-09-07T18:42:23Z date_published: 2020-09-09T00:00:00Z date_updated: 2026-04-08T07:43:58Z day: '09' ddc: - '572' degree_awarded: PhD department: - _id: LeSa doi: 10.15479/AT:ISTA:8340 ec_funded: 1 file: - access_level: closed checksum: dd270baf82121eb4472ad19d77bf227c content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: dkampjut date_created: 2020-09-08T13:32:06Z date_updated: 2021-09-11T22:30:04Z embargo_to: open_access file_id: '8345' file_name: ThesisFull20200908.docx file_size: 166146359 relation: source_file - access_level: open_access checksum: 82fce6f95ffa47ecc4ebca67ea2cc38c content_type: application/pdf creator: dernst date_created: 2020-09-14T15:02:20Z date_updated: 2021-09-11T22:30:04Z embargo: 2021-09-10 file_id: '8393' file_name: 2020_Thesis_Kampjut.pdf file_size: 13873769 relation: main_file file_date_updated: 2021-09-11T22:30:04Z has_accepted_license: '1' language: - iso: eng month: '09' oa: 1 oa_version: None page: '242' project: - _id: 2564DBCA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '665385' name: International IST Doctoral Program publication_identifier: isbn: - 978-3-99078-008-4 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '6848' relation: part_of_dissertation status: public 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: Molecular mechanisms of mitochondrial redox-coupled proton pumping enzymes type: dissertation user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd year: '2020' ... --- _id: '7427' abstract: - lang: eng text: Plants, like other multicellular organisms, survive through a delicate balance between growth and defense against pathogens. Salicylic acid (SA) is a major defense signal in plants, and the perception mechanism as well as downstream signaling activating the immune response are known. Here, we identify a parallel SA signaling that mediates growth attenuation. SA directly binds to A subunits of protein phosphatase 2A (PP2A), inhibiting activity of this complex. Among PP2A targets, the PIN2 auxin transporter is hyperphosphorylated in response to SA, leading to changed activity of this important growth regulator. Accordingly, auxin transport and auxin-mediated root development, including growth, gravitropic response, and lateral root organogenesis, are inhibited. This study reveals how SA, besides activating immunity, concomitantly attenuates growth through crosstalk with the auxin distribution network. Further analysis of this dual role of SA and characterization of additional SA-regulated PP2A targets will provide further insights into mechanisms maintaining a balance between growth and defense. acknowledged_ssus: - _id: Bio - _id: LifeSc acknowledgement: "We thank Shigeyuki Betsuyaku (University of Tsukuba), Alison Delong (Brown University), Xinnian Dong (Duke University), Dolf Weijers (Wageningen University), Yuelin Zhang (UBC), and Martine Pastuglia (Institut Jean-Pierre Bourgin) for sharing published materials; Jana Riederer for help with cantharidin physiological analysis; David Domjan for help with cloning pET28a-PIN2HL; Qing Lu for help with DARTS; Hana Kozubı´kova´ for technical support on SA derivative synthesis; Zuzana Vondra´ kova´ for technical support with tobacco cells; Lucia Strader (Washington University), Bert De Rybel (Ghent University), Bartel Vanholme (Ghent University), and Lukas Mach (BOKU) for helpful discussions; and bioimaging and life science facilities of IST Austria for continuous support. We gratefully acknowledge the Nottingham Arabidopsis Stock Center (NASC) for providing T-DNA insertional mutants. The DSC and SPR instruments were provided by the EQ-BOKU VIBT GmbH and the BOKU Core Facility for Biomolecular and Cellular Analysis, with help of Irene Schaffner. The research leading to these results has received funding from the European Union’s Horizon 2020 program (ERC grant agreement no. 742985 to J.F.) and the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) under REA grant agreement no. 291734. S.T. was supported by a European Molecular Biology Organization (EMBO) long-term postdoctoral fellowship (ALTF 723-2015). O.N. was supported by the Ministry of Education, Youth and Sports of the Czech Republic (European Regional Development Fund-Project ‘‘Centre for Experimental Plant Biology’’ no. CZ.02.1.01/0.0/0.0/16_019/0000738). J. Pospısil was supported by European Regional Development Fund Project ‘‘Centre for Experimental Plant Biology’’\r\n(no. CZ.02.1.01/0.0/0.0/16_019/0000738). J. Petrasek was supported by EU Operational Programme Prague-Competitiveness (no. CZ.2.16/3.1.00/21519). " article_processing_charge: No article_type: original author: - first_name: Shutang full_name: Tan, Shutang id: 2DE75584-F248-11E8-B48F-1D18A9856A87 last_name: Tan orcid: 0000-0002-0471-8285 - first_name: Melinda F full_name: Abas, Melinda F id: 3CFB3B1C-F248-11E8-B48F-1D18A9856A87 last_name: Abas - first_name: Inge full_name: Verstraeten, Inge id: 362BF7FE-F248-11E8-B48F-1D18A9856A87 last_name: Verstraeten orcid: 0000-0001-7241-2328 - first_name: Matous full_name: Glanc, Matous id: 1AE1EA24-02D0-11E9-9BAA-DAF4881429F2 last_name: Glanc orcid: 0000-0003-0619-7783 - first_name: Gergely full_name: Molnar, Gergely id: 34F1AF46-F248-11E8-B48F-1D18A9856A87 last_name: Molnar - first_name: Jakub full_name: Hajny, Jakub id: 4800CC20-F248-11E8-B48F-1D18A9856A87 last_name: Hajny orcid: 0000-0003-2140-7195 - first_name: Pavel full_name: Lasák, Pavel last_name: Lasák - first_name: Ivan full_name: Petřík, Ivan last_name: Petřík - first_name: Eugenia full_name: Russinova, Eugenia last_name: Russinova - first_name: Jan full_name: Petrášek, Jan last_name: Petrášek - first_name: Ondřej full_name: Novák, Ondřej last_name: Novák - first_name: Jiří full_name: Pospíšil, Jiří last_name: Pospíšil - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Tan S, Abas MF, Verstraeten I, et al. Salicylic acid targets protein phosphatase 2A to attenuate growth in plants. Current Biology. 2020;30(3):381-395.e8. doi:10.1016/j.cub.2019.11.058 apa: Tan, S., Abas, M. F., Verstraeten, I., Glanc, M., Molnar, G., Hajny, J., … Friml, J. (2020). Salicylic acid targets protein phosphatase 2A to attenuate growth in plants. Current Biology. Cell Press. https://doi.org/10.1016/j.cub.2019.11.058 chicago: Tan, Shutang, Melinda F Abas, Inge Verstraeten, Matous Glanc, Gergely Molnar, Jakub Hajny, Pavel Lasák, et al. “Salicylic Acid Targets Protein Phosphatase 2A to Attenuate Growth in Plants.” Current Biology. Cell Press, 2020. https://doi.org/10.1016/j.cub.2019.11.058. ieee: S. Tan et al., “Salicylic acid targets protein phosphatase 2A to attenuate growth in plants,” Current Biology, vol. 30, no. 3. Cell Press, p. 381–395.e8, 2020. ista: Tan S, Abas MF, Verstraeten I, Glanc M, Molnar G, Hajny J, Lasák P, Petřík I, Russinova E, Petrášek J, Novák O, Pospíšil J, Friml J. 2020. Salicylic acid targets protein phosphatase 2A to attenuate growth in plants. Current Biology. 30(3), 381–395.e8. mla: Tan, Shutang, et al. “Salicylic Acid Targets Protein Phosphatase 2A to Attenuate Growth in Plants.” Current Biology, vol. 30, no. 3, Cell Press, 2020, p. 381–395.e8, doi:10.1016/j.cub.2019.11.058. short: S. Tan, M.F. Abas, I. Verstraeten, M. Glanc, G. Molnar, J. Hajny, P. Lasák, I. Petřík, E. Russinova, J. Petrášek, O. Novák, J. Pospíšil, J. Friml, Current Biology 30 (2020) 381–395.e8. corr_author: '1' date_created: 2020-02-02T23:01:00Z date_published: 2020-02-03T00:00:00Z date_updated: 2026-08-12T22:30:52Z day: '03' ddc: - '580' department: - _id: JiFr - _id: EvBe doi: 10.1016/j.cub.2019.11.058 ec_funded: 1 external_id: isi: - '000511287900018' pmid: - '31956021' file: - access_level: open_access checksum: 16f7d51fe28f91c21e4896a2028df40b content_type: application/pdf creator: dernst date_created: 2020-09-22T09:51:28Z date_updated: 2020-09-22T09:51:28Z file_id: '8555' file_name: 2020_CurrentBiology_Tan.pdf file_size: 5360135 relation: main_file success: 1 file_date_updated: 2020-09-22T09:51:28Z has_accepted_license: '1' intvolume: ' 30' isi: 1 issue: '3' language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: 381-395.e8 pmid: 1 project: - _id: 261099A6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742985' name: Tracing Evolution of Auxin Transport and Polarity in Plants - _id: 25681D80-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '291734' name: International IST Postdoc Fellowship Programme - _id: 256FEF10-B435-11E9-9278-68D0E5697425 grant_number: 723-2015 name: Molecular Mechanism underlying Salicylic Acid Regulation of Endocytic Trafficking in Arabidopsis publication: Current Biology publication_identifier: issn: - '09609822' publication_status: published publisher: Cell Press quality_controlled: '1' related_material: record: - id: '8822' relation: dissertation_contains status: public scopus_import: '1' status: public title: Salicylic acid targets protein phosphatase 2A to attenuate growth in plants 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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 30 year: '2020' ... --- _id: '7500' abstract: - lang: eng text: "Plant survival depends on vascular tissues, which originate in a self‐organizing manner as strands of cells co‐directionally transporting the plant hormone auxin. The latter phenomenon (also known as auxin canalization) is classically hypothesized to be regulated by auxin itself via the effect of this hormone on the polarity of its own intercellular transport. Correlative observations supported this concept, but molecular insights remain limited.\r\nIn the current study, we established an experimental system based on the model Arabidopsis thaliana, which exhibits auxin transport channels and formation of vasculature strands in response to local auxin application.\r\nOur methodology permits the genetic analysis of auxin canalization under controllable experimental conditions. By utilizing this opportunity, we confirmed the dependence of auxin canalization on a PIN‐dependent auxin transport and nuclear, TIR1/AFB‐mediated auxin signaling. We also show that leaf venation and auxin‐mediated PIN repolarization in the root require TIR1/AFB signaling.\r\nFurther studies based on this experimental system are likely to yield better understanding of the mechanisms underlying auxin transport polarization in other developmental contexts." acknowledgement: We thank Mark Estelle, José M. Alonso and the Arabidopsis Stock Centre for providing seeds. We acknowledge the core facility CELLIM of CEITEC supported by the MEYS CR (LM2015062 Czech‐BioImaging) and Plant Sciences Core Facility of CEITEC Masaryk University for help in generating essential data. This project received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement no. 742985) and the Czech Science Foundation GAČR (GA13‐40637S and GA18‐26981S) to JF. JH is the recipient of a DOC Fellowship of the Austrian Academy of Sciences at the Institute of Science and Technology. The authors declare no competing interests. article_processing_charge: No article_type: original author: - first_name: E full_name: Mazur, E last_name: Mazur - first_name: Ivan full_name: Kulik, Ivan id: F0AB3FCE-02D1-11E9-BD0E-99399A5D3DEB last_name: Kulik - first_name: Jakub full_name: Hajny, Jakub id: 4800CC20-F248-11E8-B48F-1D18A9856A87 last_name: Hajny orcid: 0000-0003-2140-7195 - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 citation: ama: Mazur E, Kulik I, Hajny J, Friml J. Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in arabidopsis. New Phytologist. 2020;226(5):1375-1383. doi:10.1111/nph.16446 apa: Mazur, E., Kulik, I., Hajny, J., & Friml, J. (2020). Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in arabidopsis. New Phytologist. Wiley. https://doi.org/10.1111/nph.16446 chicago: Mazur, E, Ivan Kulik, Jakub Hajny, and Jiří Friml. “Auxin Canalization and Vascular Tissue Formation by TIR1/AFB-Mediated Auxin Signaling in Arabidopsis.” New Phytologist. Wiley, 2020. https://doi.org/10.1111/nph.16446. ieee: E. Mazur, I. Kulik, J. Hajny, and J. Friml, “Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in arabidopsis,” New Phytologist, vol. 226, no. 5. Wiley, pp. 1375–1383, 2020. ista: Mazur E, Kulik I, Hajny J, Friml J. 2020. Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in arabidopsis. New Phytologist. 226(5), 1375–1383. mla: Mazur, E., et al. “Auxin Canalization and Vascular Tissue Formation by TIR1/AFB-Mediated Auxin Signaling in Arabidopsis.” New Phytologist, vol. 226, no. 5, Wiley, 2020, pp. 1375–83, doi:10.1111/nph.16446. short: E. Mazur, I. Kulik, J. Hajny, J. Friml, New Phytologist 226 (2020) 1375–1383. corr_author: '1' date_created: 2020-02-18T10:03:47Z date_published: 2020-06-01T00:00:00Z date_updated: 2026-08-12T22:30:52Z day: '01' ddc: - '580' department: - _id: JiFr doi: 10.1111/nph.16446 ec_funded: 1 external_id: isi: - '000514939700001' pmid: - '31971254' file: - access_level: open_access checksum: 17de728b0205979feb95ce663ba918c2 content_type: application/pdf creator: dernst date_created: 2020-11-20T09:32:10Z date_updated: 2020-11-20T09:32:10Z file_id: '8781' file_name: 2020_NewPhytologist_Mazur.pdf file_size: 2106888 relation: main_file success: 1 file_date_updated: 2020-11-20T09:32:10Z has_accepted_license: '1' intvolume: ' 226' isi: 1 issue: '5' language: - iso: eng month: '06' oa: 1 oa_version: Published Version page: 1375-1383 pmid: 1 project: - _id: 261099A6-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '742985' name: Tracing Evolution of Auxin Transport and Polarity in Plants - _id: 2699E3D2-B435-11E9-9278-68D0E5697425 grant_number: '25239' name: Cell surface receptor complexes for PIN polarity and auxin-mediated development publication: New Phytologist publication_identifier: eissn: - 1469-8137 issn: - 0028-646x publication_status: published publisher: Wiley quality_controlled: '1' related_material: record: - id: '8822' relation: dissertation_contains status: public scopus_import: '1' status: public title: Auxin canalization and vascular tissue formation by TIR1/AFB-mediated auxin signaling in arabidopsis 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: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 226 year: '2020' ... --- _id: '7652' abstract: - lang: eng text: Organisms cope with change by taking advantage of transcriptional regulators. However, when faced with rare environments, the evolution of transcriptional regulators and their promoters may be too slow. Here, we investigate whether the intrinsic instability of gene duplication and amplification provides a generic alternative to canonical gene regulation. Using real-time monitoring of gene-copy-number mutations in Escherichia coli, we show that gene duplications and amplifications enable adaptation to fluctuating environments by rapidly generating copy-number and, therefore, expression-level polymorphisms. This amplification-mediated gene expression tuning (AMGET) occurs on timescales that are similar to canonical gene regulation and can respond to rapid environmental changes. Mathematical modelling shows that amplifications also tune gene expression in stochastic environments in which transcription-factor-based schemes are hard to evolve or maintain. The fleeting nature of gene amplifications gives rise to a generic population-level mechanism that relies on genetic heterogeneity to rapidly tune the expression of any gene, without leaving any genomic signature. acknowledgement: We thank L. Hurst, N. Barton, M. Pleska, M. Steinrück, B. Kavcic and A. Staron for input on the manuscript, and To. Bergmiller and R. Chait for help with microfluidics experiments. I.T. is a recipient the OMV fellowship. R.G. is a recipient of a DOC (Doctoral Fellowship Programme of the Austrian Academy of Sciences) Fellowship of the Austrian Academy of Sciences. article_processing_charge: No article_type: original author: - first_name: Isabella full_name: Tomanek, Isabella id: 3981F020-F248-11E8-B48F-1D18A9856A87 last_name: Tomanek orcid: 0000-0001-6197-363X - first_name: Rok full_name: Grah, Rok id: 483E70DE-F248-11E8-B48F-1D18A9856A87 last_name: Grah orcid: 0000-0003-2539-3560 - first_name: M. full_name: Lagator, M. last_name: Lagator - first_name: A. M. C. full_name: Andersson, A. M. C. last_name: Andersson - first_name: Jonathan P full_name: Bollback, Jonathan P id: 2C6FA9CC-F248-11E8-B48F-1D18A9856A87 last_name: Bollback orcid: 0000-0002-4624-4612 - first_name: Gašper full_name: Tkačik, Gašper id: 3D494DCA-F248-11E8-B48F-1D18A9856A87 last_name: Tkačik orcid: 0000-0002-6699-1455 - first_name: Calin C full_name: Guet, Calin C id: 47F8433E-F248-11E8-B48F-1D18A9856A87 last_name: Guet orcid: 0000-0001-6220-2052 citation: ama: Tomanek I, Grah R, Lagator M, et al. Gene amplification as a form of population-level gene expression regulation. Nature Ecology & Evolution. 2020;4(4):612-625. doi:10.1038/s41559-020-1132-7 apa: Tomanek, I., Grah, R., Lagator, M., Andersson, A. M. C., Bollback, J. P., Tkačik, G., & Guet, C. C. (2020). Gene amplification as a form of population-level gene expression regulation. Nature Ecology & Evolution. Springer Nature. https://doi.org/10.1038/s41559-020-1132-7 chicago: Tomanek, Isabella, Rok Grah, M. Lagator, A. M. C. Andersson, Jonathan P Bollback, Gašper Tkačik, and Calin C Guet. “Gene Amplification as a Form of Population-Level Gene Expression Regulation.” Nature Ecology & Evolution. Springer Nature, 2020. https://doi.org/10.1038/s41559-020-1132-7. ieee: I. Tomanek et al., “Gene amplification as a form of population-level gene expression regulation,” Nature Ecology & Evolution, vol. 4, no. 4. Springer Nature, pp. 612–625, 2020. ista: Tomanek I, Grah R, Lagator M, Andersson AMC, Bollback JP, Tkačik G, Guet CC. 2020. Gene amplification as a form of population-level gene expression regulation. Nature Ecology & Evolution. 4(4), 612–625. mla: Tomanek, Isabella, et al. “Gene Amplification as a Form of Population-Level Gene Expression Regulation.” Nature Ecology & Evolution, vol. 4, no. 4, Springer Nature, 2020, pp. 612–25, doi:10.1038/s41559-020-1132-7. short: I. Tomanek, R. Grah, M. Lagator, A.M.C. Andersson, J.P. Bollback, G. Tkačik, C.C. Guet, Nature Ecology & Evolution 4 (2020) 612–625. date_created: 2020-04-08T15:20:53Z date_published: 2020-04-01T00:00:00Z date_updated: 2026-08-12T22:30:53Z day: '01' ddc: - '570' department: - _id: GaTk - _id: CaGu doi: 10.1038/s41559-020-1132-7 external_id: isi: - '000519008300005' pmid: - '32152532' file: - access_level: open_access checksum: ef3bbf42023e30b2c24a6278025d2040 content_type: application/pdf creator: dernst date_created: 2020-10-09T09:56:01Z date_updated: 2020-10-09T09:56:01Z file_id: '8640' file_name: 2020_NatureEcolEvo_Tomanek.pdf file_size: 745242 relation: main_file success: 1 file_date_updated: 2020-10-09T09:56:01Z has_accepted_license: '1' intvolume: ' 4' isi: 1 issue: '4' language: - iso: eng month: '04' oa: 1 oa_version: Submitted Version page: 612-625 pmid: 1 project: - _id: 267C84F4-B435-11E9-9278-68D0E5697425 name: Biophysically realistic genotype-phenotype maps for regulatory networks publication: Nature Ecology & Evolution publication_identifier: issn: - 2397-334X publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: link: - description: News on IST Homepage relation: press_release url: https://ist.ac.at/en/news/how-to-thrive-without-gene-regulation/ record: - id: '7016' relation: research_data status: public - id: '7383' relation: research_data status: public - id: '8155' relation: dissertation_contains status: public - id: '8653' relation: used_in_publication status: public scopus_import: '1' status: public title: Gene amplification as a form of population-level gene expression regulation type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 4 year: '2020' ... --- OA_place: publisher _id: '8822' abstract: - lang: eng text: "Self-organization is a hallmark of plant development manifested e.g. by intricate leaf vein patterns, flexible formation of vasculature during organogenesis or its regeneration following wounding. Spontaneously arising channels transporting the phytohormone auxin, created by coordinated polar localizations of PIN-FORMED 1 (PIN1) auxin exporter, provide positional cues for these as well as other plant patterning processes. To find regulators acting downstream of auxin and the TIR1/AFB auxin signaling pathway essential for PIN1 coordinated polarization during auxin canalization, we performed microarray experiments. Besides the known components of general PIN polarity maintenance, such as PID and PIP5K kinases, we identified and characterized a new regulator of auxin canalization, the transcription factor WRKY DNA-BINDING PROTEIN 23 (WRKY23).\r\nNext, we designed a subsequent microarray experiment to further uncover other molecular players, downstream of auxin-TIR1/AFB-WRKY23 involved in the regulation of auxin-mediated PIN repolarization. We identified a novel and crucial part of the molecular machinery underlying auxin canalization. The auxin-regulated malectin-type receptor-like kinase CAMEL and the associated leucine-rich repeat receptor-like kinase CANAR target and directly phosphorylate PIN auxin transporters. camel and canar mutants are impaired in PIN1 subcellular trafficking and auxin-mediated repolarization leading to defects in auxin transport, ultimately to leaf venation and vasculature regeneration defects. Our results describe the CAMEL-CANAR receptor complex, which is required for auxin feed-back on its own transport and thus for coordinated tissue polarization during auxin canalization." alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Jakub full_name: Hajny, Jakub id: 4800CC20-F248-11E8-B48F-1D18A9856A87 last_name: Hajny orcid: 0000-0003-2140-7195 citation: ama: Hajny J. Identification and characterization of the molecular machinery of auxin-dependent canalization during vasculature formation and regeneration. 2020. doi:10.15479/AT:ISTA:8822 apa: Hajny, J. (2020). Identification and characterization of the molecular machinery of auxin-dependent canalization during vasculature formation and regeneration. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8822 chicago: Hajny, Jakub. “Identification and Characterization of the Molecular Machinery of Auxin-Dependent Canalization during Vasculature Formation and Regeneration.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8822. ieee: J. Hajny, “Identification and characterization of the molecular machinery of auxin-dependent canalization during vasculature formation and regeneration,” Institute of Science and Technology Austria, 2020. ista: Hajny J. 2020. Identification and characterization of the molecular machinery of auxin-dependent canalization during vasculature formation and regeneration. Institute of Science and Technology Austria. mla: Hajny, Jakub. Identification and Characterization of the Molecular Machinery of Auxin-Dependent Canalization during Vasculature Formation and Regeneration. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8822. short: J. Hajny, Identification and Characterization of the Molecular Machinery of Auxin-Dependent Canalization during Vasculature Formation and Regeneration, Institute of Science and Technology Austria, 2020. corr_author: '1' date_created: 2020-12-01T12:38:18Z date_published: 2020-12-01T00:00:00Z date_updated: 2026-06-18T19:02:05Z day: '01' ddc: - '580' degree_awarded: PhD department: - _id: JiFr doi: 10.15479/AT:ISTA:8822 file: - access_level: closed checksum: 210a9675af5e4c78b0b56d920ac82866 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: jhajny date_created: 2020-12-04T07:27:52Z date_updated: 2021-07-16T22:30:03Z embargo_to: open_access file_id: '8919' file_name: Jakub Hajný IST Austria final_JH.docx file_size: 91279806 relation: source_file - access_level: open_access checksum: 1781385b4aa73eba89cc76c6172f71d2 content_type: application/pdf creator: jhajny date_created: 2020-12-09T15:04:41Z date_updated: 2021-12-08T23:30:03Z embargo: 2021-12-07 file_id: '8933' file_name: Jakub Hajný IST Austria final_JH-merged without Science.pdf file_size: 68707697 relation: main_file file_date_updated: 2021-12-08T23:30:03Z has_accepted_license: '1' language: - iso: eng month: '12' oa: 1 oa_version: Published Version page: '249' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '449' relation: part_of_dissertation status: public - id: '7500' relation: part_of_dissertation status: public - id: '7427' relation: part_of_dissertation status: public - id: '191' relation: part_of_dissertation status: public - id: '6260' relation: part_of_dissertation status: public status: public supervisor: - first_name: Jiří full_name: Friml, Jiří id: 4159519E-F248-11E8-B48F-1D18A9856A87 last_name: Friml orcid: 0000-0002-8302-7596 title: Identification and characterization of the molecular machinery of auxin-dependent canalization during vasculature formation and regeneration type: dissertation user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd year: '2020' ... --- OA_place: publisher _id: '8653' abstract: - lang: eng text: "Mutations are the raw material of evolution and come in many different flavors. Point mutations change a single letter in the DNA sequence, while copy number mutations like duplications or deletions add or remove many letters of the DNA sequence simultaneously. Each type of mutation exhibits specific properties like its rate of formation and reversal. \r\nGene expression is a fundamental phenotype that can be altered by both, point and copy number mutations. The following thesis is concerned with the dynamics of gene expression evolution and how it is affected by the properties exhibited by point and copy number mutations. Specifically, we are considering i) copy number mutations during adaptation to fluctuating environments and ii) the interaction of copy number and point mutations during adaptation to constant environments.  " alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Isabella full_name: Tomanek, Isabella id: 3981F020-F248-11E8-B48F-1D18A9856A87 last_name: Tomanek orcid: 0000-0001-6197-363X citation: ama: Tomanek I. The evolution of gene expression by copy number and point mutations. 2020. doi:10.15479/AT:ISTA:8653 apa: Tomanek, I. (2020). The evolution of gene expression by copy number and point mutations. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8653 chicago: Tomanek, Isabella. “The Evolution of Gene Expression by Copy Number and Point Mutations.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8653. ieee: I. Tomanek, “The evolution of gene expression by copy number and point mutations,” Institute of Science and Technology Austria, 2020. ista: Tomanek I. 2020. The evolution of gene expression by copy number and point mutations. Institute of Science and Technology Austria. mla: Tomanek, Isabella. The Evolution of Gene Expression by Copy Number and Point Mutations. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8653. short: I. Tomanek, The Evolution of Gene Expression by Copy Number and Point Mutations, Institute of Science and Technology Austria, 2020. corr_author: '1' date_created: 2020-10-13T13:02:33Z date_published: 2020-10-13T00:00:00Z date_updated: 2026-04-08T07:29:19Z day: '13' ddc: - '576' degree_awarded: PhD department: - _id: CaGu doi: 10.15479/AT:ISTA:8653 file: - access_level: closed checksum: c01d9f59794b4b70528f37637c17ad02 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: itomanek date_created: 2020-10-16T12:14:21Z date_updated: 2021-10-20T22:30:03Z embargo_to: open_access file_id: '8666' file_name: Thesis_ITomanek_final_201016.docx file_size: 25131884 relation: source_file - access_level: open_access checksum: f8edbc3b0f81a780e13ca1e561d42d8b content_type: application/pdf creator: itomanek date_created: 2020-10-16T12:14:21Z date_updated: 2021-10-20T22:30:03Z embargo: 2021-10-19 file_id: '8667' file_name: Thesis_ITomanek_final_201016.pdf file_size: 15405675 relation: main_file file_date_updated: 2021-10-20T22:30:03Z has_accepted_license: '1' keyword: - duplication - amplification - promoter - CNV - AMGET - experimental evolution - Escherichia coli language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '117' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '7652' relation: research_data status: public status: public supervisor: - first_name: Calin C full_name: Guet, Calin C id: 47F8433E-F248-11E8-B48F-1D18A9856A87 last_name: Guet orcid: 0000-0001-6220-2052 title: The evolution of gene expression by copy number and point mutations type: dissertation user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd year: '2020' ... --- _id: '8728' abstract: - lang: eng text: Discrete-time Markov Chains (MCs) and Markov Decision Processes (MDPs) are two standard formalisms in system analysis. Their main associated quantitative objectives are hitting probabilities, discounted sum, and mean payoff. Although there are many techniques for computing these objectives in general MCs/MDPs, they have not been thoroughly studied in terms of parameterized algorithms, particularly when treewidth is used as the parameter. This is in sharp contrast to qualitative objectives for MCs, MDPs and graph games, for which treewidth-based algorithms yield significant complexity improvements. In this work, we show that treewidth can also be used to obtain faster algorithms for the quantitative problems. For an MC with n states and m transitions, we show that each of the classical quantitative objectives can be computed in O((n+m)⋅t2) time, given a tree decomposition of the MC with width t. Our results also imply a bound of O(κ⋅(n+m)⋅t2) for each objective on MDPs, where κ is the number of strategy-iteration refinements required for the given input and objective. Finally, we make an experimental evaluation of our new algorithms on low-treewidth MCs and MDPs obtained from the DaCapo benchmark suite. Our experiments show that on low-treewidth MCs and MDPs, our algorithms outperform existing well-established methods by one or more orders of magnitude. alternative_title: - LNCS article_processing_charge: No author: - first_name: Ali full_name: Asadi, Ali last_name: Asadi - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Kiarash full_name: Mohammadi, Kiarash last_name: Mohammadi - first_name: Andreas full_name: Pavlogiannis, Andreas id: 49704004-F248-11E8-B48F-1D18A9856A87 last_name: Pavlogiannis orcid: 0000-0002-8943-0722 citation: ama: 'Asadi A, Chatterjee K, Goharshady AK, Mohammadi K, Pavlogiannis A. Faster algorithms for quantitative analysis of MCs and MDPs with small treewidth. In: Automated Technology for Verification and Analysis. Vol 12302. Springer Nature; 2020:253-270. doi:10.1007/978-3-030-59152-6_14' apa: 'Asadi, A., Chatterjee, K., Goharshady, A. K., Mohammadi, K., & Pavlogiannis, A. (2020). Faster algorithms for quantitative analysis of MCs and MDPs with small treewidth. In Automated Technology for Verification and Analysis (Vol. 12302, pp. 253–270). Hanoi, Vietnam: Springer Nature. https://doi.org/10.1007/978-3-030-59152-6_14' chicago: Asadi, Ali, Krishnendu Chatterjee, Amir Kafshdar Goharshady, Kiarash Mohammadi, and Andreas Pavlogiannis. “Faster Algorithms for Quantitative Analysis of MCs and MDPs with Small Treewidth.” In Automated Technology for Verification and Analysis, 12302:253–70. Springer Nature, 2020. https://doi.org/10.1007/978-3-030-59152-6_14. ieee: A. Asadi, K. Chatterjee, A. K. Goharshady, K. Mohammadi, and A. Pavlogiannis, “Faster algorithms for quantitative analysis of MCs and MDPs with small treewidth,” in Automated Technology for Verification and Analysis, Hanoi, Vietnam, 2020, vol. 12302, pp. 253–270. ista: 'Asadi A, Chatterjee K, Goharshady AK, Mohammadi K, Pavlogiannis A. 2020. Faster algorithms for quantitative analysis of MCs and MDPs with small treewidth. Automated Technology for Verification and Analysis. ATVA: Automated Technology for Verification and Analysis, LNCS, vol. 12302, 253–270.' mla: Asadi, Ali, et al. “Faster Algorithms for Quantitative Analysis of MCs and MDPs with Small Treewidth.” Automated Technology for Verification and Analysis, vol. 12302, Springer Nature, 2020, pp. 253–70, doi:10.1007/978-3-030-59152-6_14. short: A. Asadi, K. Chatterjee, A.K. Goharshady, K. Mohammadi, A. Pavlogiannis, in:, Automated Technology for Verification and Analysis, Springer Nature, 2020, pp. 253–270. conference: end_date: 2020-10-23 location: Hanoi, Vietnam name: 'ATVA: Automated Technology for Verification and Analysis' start_date: 2020-10-19 date_created: 2020-11-06T07:30:05Z date_published: 2020-10-12T00:00:00Z date_updated: 2026-08-12T22:30:56Z day: '12' ddc: - '000' department: - _id: KrCh doi: 10.1007/978-3-030-59152-6_14 external_id: isi: - '000723555700014' file: - access_level: open_access checksum: ae83f27e5b189d5abc2e7514f1b7e1b5 content_type: application/pdf creator: dernst date_created: 2020-11-06T07:41:03Z date_updated: 2020-11-06T07:41:03Z file_id: '8729' file_name: 2020_LNCS_ATVA_Asadi_accepted.pdf file_size: 726648 relation: main_file success: 1 file_date_updated: 2020-11-06T07:41:03Z has_accepted_license: '1' intvolume: ' 12302' isi: 1 language: - iso: eng month: '10' oa: 1 oa_version: Submitted Version page: 253-270 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification - _id: 267066CE-B435-11E9-9278-68D0E5697425 name: Quantitative Analysis of Probabilistic Systems with a focus on Crypto-Currencies publication: Automated Technology for Verification and Analysis publication_identifier: eisbn: - '9783030591526' eissn: - 1611-3349 isbn: - '9783030591519' issn: - 0302-9743 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public scopus_import: '1' status: public title: Faster algorithms for quantitative analysis of MCs and MDPs with small treewidth type: conference user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 12302 year: '2020' ... --- _id: '8089' abstract: - lang: eng text: "We consider the classical problem of invariant generation for programs with polynomial assignments and focus on synthesizing invariants that are a conjunction of strict polynomial inequalities. We present a sound and semi-complete method based on positivstellensaetze, i.e. theorems in semi-algebraic geometry that characterize positive polynomials over a semi-algebraic set.\r\n\r\nOn the theoretical side, the worst-case complexity of our approach is subexponential, whereas the worst-case complexity of the previous complete method (Kapur, ACA 2004) is doubly-exponential. Even when restricted to linear invariants, the best previous complexity for complete invariant generation is exponential (Colon et al, CAV 2003). On the practical side, we reduce the invariant generation problem to quadratic programming (QCLP), which is a classical optimization problem with many industrial solvers. We demonstrate the applicability of our approach by providing experimental results on several academic benchmarks. To the best of our knowledge, the only previous invariant generation method that provides completeness guarantees for invariants consisting of polynomial inequalities is (Kapur, ACA 2004), which relies on quantifier elimination and cannot even handle toy programs such as our running example." article_processing_charge: No arxiv: 1 author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Hongfei full_name: Fu, Hongfei id: 3AAD03D6-F248-11E8-B48F-1D18A9856A87 last_name: Fu - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Ehsan Kafshdar full_name: Goharshady, Ehsan Kafshdar last_name: Goharshady citation: ama: 'Chatterjee K, Fu H, Goharshady AK, Goharshady EK. Polynomial invariant generation for non-deterministic recursive programs. In: Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation. Association for Computing Machinery; 2020:672-687. doi:10.1145/3385412.3385969' apa: 'Chatterjee, K., Fu, H., Goharshady, A. K., & Goharshady, E. K. (2020). Polynomial invariant generation for non-deterministic recursive programs. In Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation (pp. 672–687). London, United Kingdom: Association for Computing Machinery. https://doi.org/10.1145/3385412.3385969' chicago: Chatterjee, Krishnendu, Hongfei Fu, Amir Kafshdar Goharshady, and Ehsan Kafshdar Goharshady. “Polynomial Invariant Generation for Non-Deterministic Recursive Programs.” In Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation, 672–87. Association for Computing Machinery, 2020. https://doi.org/10.1145/3385412.3385969. ieee: K. Chatterjee, H. Fu, A. K. Goharshady, and E. K. Goharshady, “Polynomial invariant generation for non-deterministic recursive programs,” in Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation, London, United Kingdom, 2020, pp. 672–687. ista: 'Chatterjee K, Fu H, Goharshady AK, Goharshady EK. 2020. Polynomial invariant generation for non-deterministic recursive programs. Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation. PLDI: Programming Language Design and Implementation, 672–687.' mla: Chatterjee, Krishnendu, et al. “Polynomial Invariant Generation for Non-Deterministic Recursive Programs.” Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation, Association for Computing Machinery, 2020, pp. 672–87, doi:10.1145/3385412.3385969. short: K. Chatterjee, H. Fu, A.K. Goharshady, E.K. Goharshady, in:, Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation, Association for Computing Machinery, 2020, pp. 672–687. conference: end_date: 2020-06-20 location: London, United Kingdom name: 'PLDI: Programming Language Design and Implementation' start_date: 2020-06-15 date_created: 2020-07-05T22:00:45Z date_published: 2020-06-11T00:00:00Z date_updated: 2026-08-12T22:30:56Z day: '11' department: - _id: KrCh doi: 10.1145/3385412.3385969 external_id: arxiv: - '1902.04373' isi: - '000614622300045' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1902.04373 month: '06' oa: 1 oa_version: Preprint page: 672-687 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification publication: Proceedings of the 41st ACM SIGPLAN Conference on Programming Language Design and Implementation publication_identifier: isbn: - '9781450376136' publication_status: published publisher: Association for Computing Machinery quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public scopus_import: '1' status: public title: Polynomial invariant generation for non-deterministic recursive programs type: conference user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '7810' abstract: - lang: eng text: "Interprocedural data-flow analyses form an expressive and useful paradigm of numerous static analysis applications, such as live variables analysis, alias analysis and null pointers analysis. The most widely-used framework for interprocedural data-flow analysis is IFDS, which encompasses distributive data-flow functions over a finite domain. On-demand data-flow analyses restrict the focus of the analysis on specific program locations and data facts. This setting provides a natural split between (i) an offline (or preprocessing) phase, where the program is partially analyzed and analysis summaries are created, and (ii) an online (or query) phase, where analysis queries arrive on demand and the summaries are used to speed up answering queries.\r\nIn this work, we consider on-demand IFDS analyses where the queries concern program locations of the same procedure (aka same-context queries). We exploit the fact that flow graphs of programs have low treewidth to develop faster algorithms that are space and time optimal for many common data-flow analyses, in both the preprocessing and the query phase. We also use treewidth to develop query solutions that are embarrassingly parallelizable, i.e. the total work for answering each query is split to a number of threads such that each thread performs only a constant amount of work. Finally, we implement a static analyzer based on our algorithms, and perform a series of on-demand analysis experiments on standard benchmarks. Our experimental results show a drastic speed-up of the queries after only a lightweight preprocessing phase, which significantly outperforms existing techniques." alternative_title: - LNCS article_processing_charge: No author: - first_name: Krishnendu full_name: Chatterjee, Krishnendu id: 2E5DCA20-F248-11E8-B48F-1D18A9856A87 last_name: Chatterjee orcid: 0000-0002-4561-241X - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Rasmus full_name: Ibsen-Jensen, Rasmus id: 3B699956-F248-11E8-B48F-1D18A9856A87 last_name: Ibsen-Jensen orcid: 0000-0003-4783-0389 - first_name: Andreas full_name: Pavlogiannis, Andreas id: 49704004-F248-11E8-B48F-1D18A9856A87 last_name: Pavlogiannis orcid: 0000-0002-8943-0722 citation: ama: 'Chatterjee K, Goharshady AK, Ibsen-Jensen R, Pavlogiannis A. Optimal and perfectly parallel algorithms for on-demand data-flow analysis. In: European Symposium on Programming. Vol 12075. Springer Nature; 2020:112-140. doi:10.1007/978-3-030-44914-8_5' apa: 'Chatterjee, K., Goharshady, A. K., Ibsen-Jensen, R., & Pavlogiannis, A. (2020). Optimal and perfectly parallel algorithms for on-demand data-flow analysis. In European Symposium on Programming (Vol. 12075, pp. 112–140). Dublin, Ireland: Springer Nature. https://doi.org/10.1007/978-3-030-44914-8_5' chicago: Chatterjee, Krishnendu, Amir Kafshdar Goharshady, Rasmus Ibsen-Jensen, and Andreas Pavlogiannis. “Optimal and Perfectly Parallel Algorithms for On-Demand Data-Flow Analysis.” In European Symposium on Programming, 12075:112–40. Springer Nature, 2020. https://doi.org/10.1007/978-3-030-44914-8_5. ieee: K. Chatterjee, A. K. Goharshady, R. Ibsen-Jensen, and A. Pavlogiannis, “Optimal and perfectly parallel algorithms for on-demand data-flow analysis,” in European Symposium on Programming, Dublin, Ireland, 2020, vol. 12075, pp. 112–140. ista: 'Chatterjee K, Goharshady AK, Ibsen-Jensen R, Pavlogiannis A. 2020. Optimal and perfectly parallel algorithms for on-demand data-flow analysis. European Symposium on Programming. ESOP: Programming Languages and Systems, LNCS, vol. 12075, 112–140.' mla: Chatterjee, Krishnendu, et al. “Optimal and Perfectly Parallel Algorithms for On-Demand Data-Flow Analysis.” European Symposium on Programming, vol. 12075, Springer Nature, 2020, pp. 112–40, doi:10.1007/978-3-030-44914-8_5. short: K. Chatterjee, A.K. Goharshady, R. Ibsen-Jensen, A. Pavlogiannis, in:, European Symposium on Programming, Springer Nature, 2020, pp. 112–140. conference: end_date: 2020-04-30 location: Dublin, Ireland name: 'ESOP: Programming Languages and Systems' start_date: 2020-04-25 corr_author: '1' date_created: 2020-05-10T22:00:50Z date_published: 2020-04-18T00:00:00Z date_updated: 2026-08-12T22:30:56Z day: '18' ddc: - '000' department: - _id: KrCh doi: 10.1007/978-3-030-44914-8_5 external_id: isi: - '000681656800005' file: - access_level: open_access checksum: 8618b80f4cf7b39a60e61a6445ad9807 content_type: application/pdf creator: dernst date_created: 2020-05-26T13:34:48Z date_updated: 2020-07-14T12:48:03Z file_id: '7895' file_name: 2020_LNCS_Chatterjee.pdf file_size: 651250 relation: main_file file_date_updated: 2020-07-14T12:48:03Z has_accepted_license: '1' intvolume: ' 12075' isi: 1 language: - iso: eng month: '04' oa: 1 oa_version: Published Version page: 112-140 project: - _id: 25832EC2-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S 11407_N23 name: Rigorous Systems Engineering - _id: 25892FC0-B435-11E9-9278-68D0E5697425 grant_number: ICT15-003 name: Efficient Algorithms for Computer Aided Verification - _id: 266EEEC0-B435-11E9-9278-68D0E5697425 name: Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts - _id: 267066CE-B435-11E9-9278-68D0E5697425 name: Quantitative Analysis of Probabilistic Systems with a focus on Crypto-Currencies publication: European Symposium on Programming publication_identifier: eissn: - 1611-3349 isbn: - '9783030449131' issn: - 0302-9743 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public scopus_import: '1' status: public title: Optimal and perfectly parallel algorithms for on-demand data-flow analysis 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: conference user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 12075 year: '2020' ... --- _id: '6918' abstract: - lang: eng text: "We consider the classic problem of Network Reliability. A network is given together with a source vertex, one or more target vertices, and probabilities assigned to each of the edges. Each edge of the network is operable with its associated probability and the problem is to determine the probability of having at least one source-to-target path that is entirely composed of operable edges. This problem is known to be NP-hard.\r\n\r\nWe provide a novel scalable algorithm to solve the Network Reliability problem when the treewidth of the underlying network is small. We also show our algorithm’s applicability for real-world transit networks that have small treewidth, including the metro networks of major cities, such as London and Tokyo. Our algorithm leverages tree decompositions to shrink the original graph into much smaller graphs, for which reliability can be efficiently and exactly computed using a brute force method. To the best of our knowledge, this is the first exact algorithm for Network Reliability that can scale to handle real-world instances of the problem." acknowledgement: We are grateful to the anonymous reviewers for their comments, which significantly improved the present work. The research was partially supported by the EPSRC Early Career Fellowship EP/R023379/1, grant no. SC7-1718-01 of the London Mathematical Society, an IBM PhD Fellowship, and a DOC Fellowship of the Austrian Academy of Sciences (ÖAW). article_number: '106665' article_processing_charge: No article_type: original arxiv: 1 author: - first_name: Amir Kafshdar full_name: Goharshady, Amir Kafshdar id: 391365CE-F248-11E8-B48F-1D18A9856A87 last_name: Goharshady orcid: 0000-0003-1702-6584 - first_name: Fatemeh full_name: Mohammadi, Fatemeh last_name: Mohammadi citation: ama: Goharshady AK, Mohammadi F. An efficient algorithm for computing network reliability in small treewidth. Reliability Engineering and System Safety. 2020;193. doi:10.1016/j.ress.2019.106665 apa: Goharshady, A. K., & Mohammadi, F. (2020). An efficient algorithm for computing network reliability in small treewidth. Reliability Engineering and System Safety. Elsevier. https://doi.org/10.1016/j.ress.2019.106665 chicago: Goharshady, Amir Kafshdar, and Fatemeh Mohammadi. “An Efficient Algorithm for Computing Network Reliability in Small Treewidth.” Reliability Engineering and System Safety. Elsevier, 2020. https://doi.org/10.1016/j.ress.2019.106665. ieee: A. K. Goharshady and F. Mohammadi, “An efficient algorithm for computing network reliability in small treewidth,” Reliability Engineering and System Safety, vol. 193. Elsevier, 2020. ista: Goharshady AK, Mohammadi F. 2020. An efficient algorithm for computing network reliability in small treewidth. Reliability Engineering and System Safety. 193, 106665. mla: Goharshady, Amir Kafshdar, and Fatemeh Mohammadi. “An Efficient Algorithm for Computing Network Reliability in Small Treewidth.” Reliability Engineering and System Safety, vol. 193, 106665, Elsevier, 2020, doi:10.1016/j.ress.2019.106665. short: A.K. Goharshady, F. Mohammadi, Reliability Engineering and System Safety 193 (2020). date_created: 2019-09-29T22:00:44Z date_published: 2020-01-01T00:00:00Z date_updated: 2026-08-12T22:30:56Z day: '01' department: - _id: KrCh doi: 10.1016/j.ress.2019.106665 external_id: arxiv: - '1712.09692' isi: - '000501641400050' intvolume: ' 193' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/1712.09692 month: '01' oa: 1 oa_version: Preprint project: - _id: 266EEEC0-B435-11E9-9278-68D0E5697425 name: Quantitative Game-theoretic Analysis of Blockchain Applications and Smart Contracts publication: Reliability Engineering and System Safety publication_identifier: issn: - 0951-8320 publication_status: published publisher: Elsevier quality_controlled: '1' related_material: record: - id: '8934' relation: dissertation_contains status: public scopus_import: '1' status: public title: An efficient algorithm for computing network reliability in small treewidth type: journal_article user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd volume: 193 year: '2020' ... --- OA_place: publisher _id: '7525' abstract: - lang: eng text: "The medial habenula (MHb) is an evolutionary conserved epithalamic structure important for the modulation of emotional memory. It is involved in regulation of anxiety, compulsive behavior, addiction (nicotinic and opioid), sexual and feeding behavior. MHb receives inputs from septal regions and projects exclusively to the interpeduncular nucleus (IPN). Distinct sub-regions of the septum project to different subnuclei of MHb: the bed nucleus of anterior commissure projects to dorsal MHb and the triangular septum projects to ventral MHb. Furthermore, the dorsal and ventral MHb project to the lateral and rostral/central IPN, respectively. Importantly, these projections have unique features of prominent co-release of different neurotransmitters and requirement of a peculiar type of calcium channel for release. In general, synaptic neurotransmission requires an activity-dependent influx of Ca2+ into the presynaptic terminal through voltage-gated calcium channels. The calcium channel family most commonly involved in neurotransmitter release comprises three members, P/Q-, N- and R-type with Cav2.1, Cav2.2 and Cav2.3 subunits, respectively. In contrast to most CNS synapses that mainly express Cav2.1 and/or Cav2.2, MHb terminals in the IPN exclusively express Cav2.3. In other parts of the brain, such as the hippocampus, Cav2.3 is mostly located to postsynaptic elements. This unusual presynaptic location of Cav2.3 in the MHb-IPN pathway implies unique mechanisms of glutamate release in this pathway. One potential example of such uniqueness is the facilitation of release by GABAB receptor (GBR) activation. Presynaptic GBRs usually inhibit the release of neurotransmitters by inhibiting presynaptic calcium channels. MHb shows the highest expression levels of GBR in the brain. GBRs comprise two subunits, GABAB1 (GB1) and GABAB2 (GB2), and are associated with auxiliary subunits, called potassium channel tetramerization domain containing proteins (KCTD) 8, 12, 12b and 16. Among these four subunits, KCTD12b is exclusively expressed in ventral MHb, and KCTD8 shows the strongest expression in the whole MHb among other brain regions, indicating that KCTD8 and KCTD12b may be involved in the unique mechanisms of neurotransmitter release mediated by Cav2.3 and regulated by GBRs in this pathway. \r\nIn the present study, we first verified that neurotransmission in both dorsal and ventral MHb-IPN pathways is mainly mediated by Cav2.3 using a selective blocker of R-type channels, SNX-482. We next found that baclofen, a GBR agonist, has facilitatory effects on release from ventral MHb terminal in rostral IPN, whereas it has inhibitory effects on release from dorsal MHb terminals in lateral IPN, indicating that KCTD12b expressed exclusively in ventral MHb may have a role in the facilitatory effects of GBR activation. In a heterologous expression system using HEK cells, we found that KCTD8 and KCTD12b but not KCTD12 directly bind with Cav2.3. Pre-embedding immunogold electron microscopy data show that Cav2.3 and KCTD12b are distributed most densely in presynaptic active zone in IPN with KCTD12b being present only in rostral/central but not lateral IPN, whereas GABAB, KCTD8 and KCTD12 are distributed most densely in perisynaptic sites with KCTD12 present more frequently in postsynaptic elements and only in rostral/central IPN. In freeze-fracture replica labelling, Cav2.3, KCTD8 and KCTD12b are co-localized with each other in the same active zone indicating that they may form complexes regulating vesicle release in rostral IPN. \r\nOn electrophysiological studies of wild type (WT) mice, we found that paired-pulse ratio in rostral IPN of KCTD12b knock-out (KO) mice is lower than those of WT and KCTD8 KO mice. Consistent with this finding, in mean variance analysis, release probability in rostral IPN of KCTD12b KO mice is higher than that of WT and KCTD8 KO mice. Although paired-pulse ratios are not different between WT and KCTD8 KO mice, the mean variance analysis revealed significantly lower release probability in rostral IPN of KCTD8 KO than WT mice. These results demonstrate bidirectional regulation of Cav2.3-mediated release by KCTD8 and KCTD12b without GBR activation in rostral IPN. Finally, we examined the baclofen effects in rostral IPN of KCTD8 and KCTD12b KO mice, and found the facilitation of release remained in both KO mice, indicating that the peculiar effects of the GBR activation in this pathway do not depend on the selective expression of these KCTD subunits in ventral MHb. However, we found that presynaptic potentiation of evoked EPSC amplitude by baclofen falls to baseline after washout faster in KCTD12b KO mice than WT, KCTD8 KO and KCTD8/12b double KO mice. This result indicates that KCTD12b is involved in sustained potentiation of vesicle release by GBR activation, whereas KCTD8 is involved in its termination in the absence of KCTD12b. Consistent with these functional findings, replica labelling revealed an increase in density of KCTD8, but not Cav2.3 or GBR at active zone in rostral IPN of KCTD12b KO mice compared with that of WT mice, suggesting that increased association of KCTD8 with Cav2.3 facilitates the release probability and termination of the GBR effect in the absence of KCTD12b.\r\nIn summary, our study provided new insights into the physiological roles of presynaptic Cav2.3, GBRs and their auxiliary subunits KCTDs at an evolutionary conserved neuronal circuit. Future studies will be required to identify the exact molecular mechanism underlying the GBR-mediated presynaptic potentiation on ventral MHb terminals. It remains to be determined whether the prominent presence of presynaptic KCTDs at active zone could exert similar neuromodulatory functions in different pathways of the brain.\r\n" acknowledged_ssus: - _id: EM-Fac alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Pradeep full_name: Bhandari, Pradeep id: 45EDD1BC-F248-11E8-B48F-1D18A9856A87 last_name: Bhandari orcid: 0000-0003-0863-4481 citation: ama: Bhandari P. Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway. 2020. doi:10.15479/AT:ISTA:7525 apa: Bhandari, P. (2020). Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:7525 chicago: Bhandari, Pradeep. “Localization and Functional Role of Cav2.3 in the Medial Habenula to Interpeduncular Nucleus Pathway.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:7525. ieee: P. Bhandari, “Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway,” Institute of Science and Technology Austria, 2020. ista: Bhandari P. 2020. Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway. Institute of Science and Technology Austria. mla: Bhandari, Pradeep. Localization and Functional Role of Cav2.3 in the Medial Habenula to Interpeduncular Nucleus Pathway. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:7525. short: P. Bhandari, Localization and Functional Role of Cav2.3 in the Medial Habenula to Interpeduncular Nucleus Pathway, Institute of Science and Technology Austria, 2020. corr_author: '1' date_created: 2020-02-26T10:56:37Z date_published: 2020-02-28T00:00:00Z date_updated: 2026-04-08T07:27:27Z day: '28' ddc: - '570' degree_awarded: PhD department: - _id: RySh doi: 10.15479/AT:ISTA:7525 file: - access_level: open_access checksum: 4589234fdb12b4ad72273b311723a7b4 content_type: application/pdf creator: pbhandari date_created: 2020-02-28T08:37:53Z date_updated: 2021-03-01T23:30:04Z embargo: 2021-02-28 file_id: '7538' file_name: Pradeep Bhandari Thesis.pdf file_size: 9646346 relation: main_file title: Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway - access_level: closed checksum: aa79490553ca0a5c9b6fbcd152e93928 content_type: application/vnd.openxmlformats-officedocument.wordprocessingml.document creator: pbhandari date_created: 2020-02-28T08:47:14Z date_updated: 2021-03-01T23:30:04Z embargo_to: open_access file_id: '7539' file_name: Pradeep Bhandari Thesis.docx file_size: 35252164 relation: source_file title: Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway file_date_updated: 2021-03-01T23:30:04Z has_accepted_license: '1' keyword: - Cav2.3 - medial habenula (MHb) - interpeduncular nucleus (IPN) language: - iso: eng month: '02' oa: 1 oa_version: Published Version page: '79' publication_identifier: issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria status: public supervisor: - first_name: Ryuichi full_name: Shigemoto, Ryuichi id: 499F3ABC-F248-11E8-B48F-1D18A9856A87 last_name: Shigemoto orcid: 0000-0001-8761-9444 title: Localization and functional role of Cav2.3 in the medial habenula to interpeduncular nucleus pathway type: dissertation user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd year: '2020' ... --- _id: '7161' abstract: - lang: eng text: In this paper, we introduce an inertial projection-type method with different updating strategies for solving quasi-variational inequalities with strongly monotone and Lipschitz continuous operators in real Hilbert spaces. Under standard assumptions, we establish different strong convergence results for the proposed algorithm. Primary numerical experiments demonstrate the potential applicability of our scheme compared with some related methods in the literature. acknowledgement: We are grateful to the anonymous referees and editor whose insightful comments helped to considerably improve an earlier version of this paper. The research of the first author is supported by an ERC Grant from the Institute of Science and Technology (IST). article_processing_charge: No article_type: original author: - first_name: Yekini full_name: Shehu, Yekini id: 3FC7CB58-F248-11E8-B48F-1D18A9856A87 last_name: Shehu orcid: 0000-0001-9224-7139 - first_name: Aviv full_name: Gibali, Aviv last_name: Gibali - first_name: Simone full_name: Sagratella, Simone last_name: Sagratella citation: ama: Shehu Y, Gibali A, Sagratella S. Inertial projection-type methods for solving quasi-variational inequalities in real Hilbert spaces. Journal of Optimization Theory and Applications. 2020;184:877–894. doi:10.1007/s10957-019-01616-6 apa: Shehu, Y., Gibali, A., & Sagratella, S. (2020). Inertial projection-type methods for solving quasi-variational inequalities in real Hilbert spaces. Journal of Optimization Theory and Applications. Springer Nature. https://doi.org/10.1007/s10957-019-01616-6 chicago: Shehu, Yekini, Aviv Gibali, and Simone Sagratella. “Inertial Projection-Type Methods for Solving Quasi-Variational Inequalities in Real Hilbert Spaces.” Journal of Optimization Theory and Applications. Springer Nature, 2020. https://doi.org/10.1007/s10957-019-01616-6. ieee: Y. Shehu, A. Gibali, and S. Sagratella, “Inertial projection-type methods for solving quasi-variational inequalities in real Hilbert spaces,” Journal of Optimization Theory and Applications, vol. 184. Springer Nature, pp. 877–894, 2020. ista: Shehu Y, Gibali A, Sagratella S. 2020. Inertial projection-type methods for solving quasi-variational inequalities in real Hilbert spaces. Journal of Optimization Theory and Applications. 184, 877–894. mla: Shehu, Yekini, et al. “Inertial Projection-Type Methods for Solving Quasi-Variational Inequalities in Real Hilbert Spaces.” Journal of Optimization Theory and Applications, vol. 184, Springer Nature, 2020, pp. 877–894, doi:10.1007/s10957-019-01616-6. short: Y. Shehu, A. Gibali, S. Sagratella, Journal of Optimization Theory and Applications 184 (2020) 877–894. date_created: 2019-12-09T21:33:44Z date_published: 2020-03-01T00:00:00Z date_updated: 2024-11-04T13:52:44Z day: '01' ddc: - '518' - '510' - '515' department: - _id: VlKo doi: 10.1007/s10957-019-01616-6 ec_funded: 1 external_id: isi: - '000511805200009' file: - access_level: open_access checksum: 9f6dc6c6bf2b48cb3a2091a9ed5feaf2 content_type: application/pdf creator: dernst date_created: 2020-10-12T10:40:27Z date_updated: 2021-03-16T23:30:04Z embargo: 2021-03-15 file_id: '8647' file_name: 2020_JourOptimizationTheoryApplic_Shehu.pdf file_size: 332641 relation: main_file file_date_updated: 2021-03-16T23:30:04Z has_accepted_license: '1' intvolume: ' 184' isi: 1 language: - iso: eng month: '03' oa: 1 oa_version: Submitted Version page: 877–894 project: - _id: 25FBA906-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '616160' name: 'Discrete Optimization in Computer Vision: Theory and Practice' publication: Journal of Optimization Theory and Applications publication_identifier: eissn: - 1573-2878 issn: - 0022-3239 publication_status: published publisher: Springer Nature quality_controlled: '1' scopus_import: '1' status: public title: Inertial projection-type methods for solving quasi-variational inequalities in real Hilbert spaces type: journal_article user_id: c635000d-4b10-11ee-a964-aac5a93f6ac1 volume: 184 year: '2020' ... --- OA_place: publisher _id: '8657' abstract: - lang: eng text: "Synthesis of proteins – translation – is a fundamental process of life. Quantitative studies anchor translation into the context of bacterial physiology and reveal several mathematical relationships, called “growth laws,” which capture physiological feedbacks between protein synthesis and cell growth. Growth laws describe the dependency of the ribosome abundance as a function of growth rate, which can change depending on the growth conditions. Perturbations of translation reveal that bacteria employ a compensatory strategy in which the reduced translation capability results in increased expression of the translation machinery.\r\nPerturbations of translation are achieved in various ways; clinically interesting is the application of translation-targeting antibiotics – translation inhibitors. The antibiotic effects on bacterial physiology are often poorly understood. Bacterial responses to two or more simultaneously applied antibiotics are even more puzzling. The combined antibiotic effect determines the type of drug interaction, which ranges from synergy (the effect is stronger than expected) to antagonism (the effect is weaker) and suppression (one of the drugs loses its potency).\r\nIn the first part of this work, we systematically measure the pairwise interaction network for translation inhibitors that interfere with different steps in translation. We find that the interactions are surprisingly diverse and tend to be more antagonistic. To explore the underlying mechanisms, we begin with a minimal biophysical model of combined antibiotic action. We base this model on the kinetics of antibiotic uptake and binding together with the physiological response described by the growth laws. The biophysical model explains some drug interactions, but not all; it specifically fails to predict suppression.\r\nIn the second part of this work, we hypothesize that elusive suppressive drug interactions result from the interplay between ribosomes halted in different stages of translation. To elucidate this putative mechanism of drug interactions between translation inhibitors, we generate translation bottlenecks genetically using in- ducible control of translation factors that regulate well-defined translation cycle steps. These perturbations accurately mimic antibiotic action and drug interactions, supporting that the interplay of different translation bottlenecks partially causes these interactions.\r\nWe extend this approach by varying two translation bottlenecks simultaneously. This approach reveals the suppression of translocation inhibition by inhibited translation. We rationalize this effect by modeling dense traffic of ribosomes that move on transcripts in a translation factor-mediated manner. This model predicts a dissolution of traffic jams caused by inhibited translocation when the density of ribosome traffic is reduced by lowered initiation. We base this model on the growth laws and quantitative relationships between different translation and growth parameters.\r\nIn the final part of this work, we describe a set of tools aimed at quantification of physiological and translation parameters. We further develop a simple model that directly connects the abundance of a translation factor with the growth rate, which allows us to extract physiological parameters describing initiation. We demonstrate the development of tools for measuring translation rate.\r\nThis thesis showcases how a combination of high-throughput growth rate mea- surements, genetics, and modeling can reveal mechanisms of drug interactions. Furthermore, by a gradual transition from combinations of antibiotics to precise genetic interventions, we demonstrated the equivalency between genetic and chemi- cal perturbations of translation. These findings tile the path for quantitative studies of antibiotic combinations and illustrate future approaches towards the quantitative description of translation." acknowledged_ssus: - _id: LifeSc - _id: M-Shop acknowledgement: I thank Life Science Facilities for their continuous support with providing top-notch laboratory materials, keeping the devices humming, and coordinating the repairs and building of custom-designed laboratory equipment with the MIBA Machine shop. alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Bor full_name: Kavcic, Bor id: 350F91D2-F248-11E8-B48F-1D18A9856A87 last_name: Kavcic orcid: 0000-0001-6041-254X citation: ama: 'Kavcic B. Perturbations of protein synthesis: from antibiotics to genetics and physiology. 2020. doi:10.15479/AT:ISTA:8657' apa: 'Kavcic, B. (2020). Perturbations of protein synthesis: from antibiotics to genetics and physiology. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:8657' chicago: 'Kavcic, Bor. “Perturbations of Protein Synthesis: From Antibiotics to Genetics and Physiology.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:8657.' ieee: 'B. Kavcic, “Perturbations of protein synthesis: from antibiotics to genetics and physiology,” Institute of Science and Technology Austria, 2020.' ista: 'Kavcic B. 2020. Perturbations of protein synthesis: from antibiotics to genetics and physiology. Institute of Science and Technology Austria.' mla: 'Kavcic, Bor. Perturbations of Protein Synthesis: From Antibiotics to Genetics and Physiology. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:8657.' short: 'B. Kavcic, Perturbations of Protein Synthesis: From Antibiotics to Genetics and Physiology, Institute of Science and Technology Austria, 2020.' corr_author: '1' date_created: 2020-10-13T16:46:14Z date_published: 2020-10-14T00:00:00Z date_updated: 2026-07-06T12:44:35Z day: '14' ddc: - '571' - '530' - '570' degree_awarded: PhD department: - _id: GaTk doi: 10.15479/AT:ISTA:8657 file: - access_level: open_access checksum: d708ecd62b6fcc3bc1feb483b8dbe9eb content_type: application/pdf creator: bkavcic date_created: 2020-10-15T06:41:20Z date_updated: 2021-10-07T22:30:03Z embargo: 2021-10-06 file_id: '8663' file_name: kavcicB_thesis202009.pdf file_size: 52636162 relation: main_file - access_level: closed checksum: bb35f2352a04db19164da609f00501f3 content_type: application/zip creator: bkavcic date_created: 2020-10-15T06:41:53Z date_updated: 2021-10-07T22:30:03Z embargo_to: open_access file_id: '8664' file_name: 2020b.zip file_size: 321681247 relation: source_file file_date_updated: 2021-10-07T22:30:03Z has_accepted_license: '1' language: - iso: eng month: '10' oa: 1 oa_version: Published Version page: '271' publication_identifier: isbn: - 978-3-99078-011-4 issn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '8250' relation: part_of_dissertation status: public - id: '7673' relation: part_of_dissertation status: public status: public supervisor: - first_name: Gašper full_name: Tkačik, Gašper id: 3D494DCA-F248-11E8-B48F-1D18A9856A87 last_name: Tkačik orcid: 0000-0002-6699-1455 - first_name: Mark Tobias full_name: Bollenbach, Mark Tobias id: 3E6DB97A-F248-11E8-B48F-1D18A9856A87 last_name: Bollenbach orcid: 0000-0003-4398-476X title: 'Perturbations of protein synthesis: from antibiotics to genetics and physiology' type: dissertation user_id: ba8df636-2132-11f1-aed0-ed93e2281fdd year: '2020' ... --- _id: '8569' abstract: - lang: eng text: Concerted radial migration of newly born cortical projection neurons, from their birthplace to their final target lamina, is a key step in the assembly of the cerebral cortex. The cellular and molecular mechanisms regulating the specific sequential steps of radial neuronal migration in vivo are however still unclear, let alone the effects and interactions with the extracellular environment. In any in vivo context, cells will always be exposed to a complex extracellular environment consisting of (1) secreted factors acting as potential signaling cues, (2) the extracellular matrix, and (3) other cells providing cell–cell interaction through receptors and/or direct physical stimuli. Most studies so far have described and focused mainly on intrinsic cell-autonomous gene functions in neuronal migration but there is accumulating evidence that non-cell-autonomous-, local-, systemic-, and/or whole tissue-wide effects substantially contribute to the regulation of radial neuronal migration. These non-cell-autonomous effects may differentially affect cortical neuron migration in distinct cellular environments. However, the cellular and molecular natures of such non-cell-autonomous mechanisms are mostly unknown. Furthermore, physical forces due to collective migration and/or community effects (i.e., interactions with surrounding cells) may play important roles in neocortical projection neuron migration. In this concise review, we first outline distinct models of non-cell-autonomous interactions of cortical projection neurons along their radial migration trajectory during development. We then summarize experimental assays and platforms that can be utilized to visualize and potentially probe non-cell-autonomous mechanisms. Lastly, we define key questions to address in the future. acknowledgement: AH was a recipient of a DOC Fellowship (24812) of the Austrian Academy of Sciences. This work also received support from IST Austria institutional funds; the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007–2013) under REA Grant Agreement No. 618444 to SH. article_number: '574382' article_processing_charge: Yes (via OA deal) article_type: original author: - first_name: Andi H full_name: Hansen, Andi H id: 38853E16-F248-11E8-B48F-1D18A9856A87 last_name: Hansen - first_name: Simon full_name: Hippenmeyer, Simon id: 37B36620-F248-11E8-B48F-1D18A9856A87 last_name: Hippenmeyer orcid: 0000-0003-2279-1061 citation: ama: Hansen AH, Hippenmeyer S. Non-cell-autonomous mechanisms in radial projection neuron migration in the developing cerebral cortex. Frontiers in Cell and Developmental Biology. 2020;8(9). doi:10.3389/fcell.2020.574382 apa: Hansen, A. H., & Hippenmeyer, S. (2020). Non-cell-autonomous mechanisms in radial projection neuron migration in the developing cerebral cortex. Frontiers in Cell and Developmental Biology. Frontiers. https://doi.org/10.3389/fcell.2020.574382 chicago: Hansen, Andi H, and Simon Hippenmeyer. “Non-Cell-Autonomous Mechanisms in Radial Projection Neuron Migration in the Developing Cerebral Cortex.” Frontiers in Cell and Developmental Biology. Frontiers, 2020. https://doi.org/10.3389/fcell.2020.574382. ieee: A. H. Hansen and S. Hippenmeyer, “Non-cell-autonomous mechanisms in radial projection neuron migration in the developing cerebral cortex,” Frontiers in Cell and Developmental Biology, vol. 8, no. 9. Frontiers, 2020. ista: Hansen AH, Hippenmeyer S. 2020. Non-cell-autonomous mechanisms in radial projection neuron migration in the developing cerebral cortex. Frontiers in Cell and Developmental Biology. 8(9), 574382. mla: Hansen, Andi H., and Simon Hippenmeyer. “Non-Cell-Autonomous Mechanisms in Radial Projection Neuron Migration in the Developing Cerebral Cortex.” Frontiers in Cell and Developmental Biology, vol. 8, no. 9, 574382, Frontiers, 2020, doi:10.3389/fcell.2020.574382. short: A.H. Hansen, S. Hippenmeyer, Frontiers in Cell and Developmental Biology 8 (2020). corr_author: '1' date_created: 2020-09-26T06:11:07Z date_published: 2020-09-25T00:00:00Z date_updated: 2026-08-12T22:30:59Z day: '25' ddc: - '570' department: - _id: SiHi doi: 10.3389/fcell.2020.574382 ec_funded: 1 external_id: isi: - '000577915900001' pmid: - '33102480' file: - access_level: open_access checksum: 01f731824194c94c81a5da360d997073 content_type: application/pdf creator: dernst date_created: 2020-09-28T13:11:17Z date_updated: 2020-09-28T13:11:17Z file_id: '8584' file_name: 2020_Frontiers_Hansen.pdf file_size: 5527139 relation: main_file success: 1 file_date_updated: 2020-09-28T13:11:17Z has_accepted_license: '1' intvolume: ' 8' isi: 1 issue: '9' language: - iso: eng month: '09' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 2625A13E-B435-11E9-9278-68D0E5697425 grant_number: '24812' name: Molecular mechanisms of radial neuronal migration - _id: 25D61E48-B435-11E9-9278-68D0E5697425 call_identifier: FP7 grant_number: '618444' name: Molecular Mechanisms of Cerebral Cortex Development publication: Frontiers in Cell and Developmental Biology publication_identifier: issn: - 2296-634X publication_status: published publisher: Frontiers quality_controlled: '1' related_material: record: - id: '9962' relation: dissertation_contains status: public scopus_import: '1' status: public title: Non-cell-autonomous mechanisms in radial projection neuron migration in the developing cerebral cortex 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: 4359f0d1-fa6c-11eb-b949-802e58b17ae8 volume: 8 year: '2020' ... --- _id: '8250' abstract: - lang: eng text: 'Antibiotics that interfere with translation, when combined, interact in diverse and difficult-to-predict ways. Here, we explain these interactions by “translation bottlenecks”: points in the translation cycle where antibiotics block ribosomal progression. To elucidate the underlying mechanisms of drug interactions between translation inhibitors, we generate translation bottlenecks genetically using inducible control of translation factors that regulate well-defined translation cycle steps. These perturbations accurately mimic antibiotic action and drug interactions, supporting that the interplay of different translation bottlenecks causes these interactions. We further show that growth laws, combined with drug uptake and binding kinetics, enable the direct prediction of a large fraction of observed interactions, yet fail to predict suppression. However, varying two translation bottlenecks simultaneously supports that dense traffic of ribosomes and competition for translation factors account for the previously unexplained suppression. These results highlight the importance of “continuous epistasis” in bacterial physiology.' acknowledgement: "We thank M. Hennessey-Wesen, I. Tomanek, K. Jain, A. Staron, K. Tomasek, M. Scott,\r\nK.C. Huang, and Z. Gitai for reading the manuscript and constructive comments. B.K. is\r\nindebted to C. Guet for additional guidance and generous support, which rendered this\r\nwork possible. B.K. thanks all members of Guet group for many helpful discussions and\r\nsharing of resources. B.K. additionally acknowledges the tremendous support from A.\r\nAngermayr and K. Mitosch with experimental work. We further thank E. Brown for\r\nhelpful comments regarding lamotrigine, and A. Buskirk for valuable suggestions\r\nregarding the ribosome footprint size. This work was supported in part by Austrian\r\nScience Fund (FWF) standalone grants P 27201-B22 (to T.B.) and P 28844 (to G.T.),\r\nHFSP program Grant RGP0042/2013 (to T.B.), German Research Foundation (DFG)\r\nstandalone grant BO 3502/2-1 (to T.B.), and German Research Foundation (DFG)\r\nCollaborative Research Centre (SFB) 1310 (to T.B.). Open access funding provided by\r\nProjekt DEAL." article_number: '4013' article_processing_charge: No article_type: original author: - first_name: Bor full_name: Kavcic, Bor id: 350F91D2-F248-11E8-B48F-1D18A9856A87 last_name: Kavcic orcid: 0000-0001-6041-254X - first_name: Gašper full_name: Tkačik, Gašper id: 3D494DCA-F248-11E8-B48F-1D18A9856A87 last_name: Tkačik orcid: 0000-0002-6699-1455 - first_name: Tobias full_name: Bollenbach, Tobias id: 3E6DB97A-F248-11E8-B48F-1D18A9856A87 last_name: Bollenbach orcid: 0000-0003-4398-476X citation: ama: Kavcic B, Tkačik G, Bollenbach MT. Mechanisms of drug interactions between translation-inhibiting antibiotics. Nature Communications. 2020;11. doi:10.1038/s41467-020-17734-z apa: Kavcic, B., Tkačik, G., & Bollenbach, M. T. (2020). Mechanisms of drug interactions between translation-inhibiting antibiotics. Nature Communications. Springer Nature. https://doi.org/10.1038/s41467-020-17734-z chicago: Kavcic, Bor, Gašper Tkačik, and Mark Tobias Bollenbach. “Mechanisms of Drug Interactions between Translation-Inhibiting Antibiotics.” Nature Communications. Springer Nature, 2020. https://doi.org/10.1038/s41467-020-17734-z. ieee: B. Kavcic, G. Tkačik, and M. T. Bollenbach, “Mechanisms of drug interactions between translation-inhibiting antibiotics,” Nature Communications, vol. 11. Springer Nature, 2020. ista: Kavcic B, Tkačik G, Bollenbach MT. 2020. Mechanisms of drug interactions between translation-inhibiting antibiotics. Nature Communications. 11, 4013. mla: Kavcic, Bor, et al. “Mechanisms of Drug Interactions between Translation-Inhibiting Antibiotics.” Nature Communications, vol. 11, 4013, Springer Nature, 2020, doi:10.1038/s41467-020-17734-z. short: B. Kavcic, G. Tkačik, M.T. Bollenbach, Nature Communications 11 (2020). date_created: 2020-08-12T09:13:50Z date_published: 2020-08-11T00:00:00Z date_updated: 2026-08-12T22:30:59Z day: '11' ddc: - '570' department: - _id: GaTk doi: 10.1038/s41467-020-17734-z external_id: isi: - '000562769300008' pmid: - '32782250' file: - access_level: open_access checksum: 986bebb308850a55850028d3d2b5b664 content_type: application/pdf creator: dernst date_created: 2020-08-17T07:36:57Z date_updated: 2020-08-17T07:36:57Z file_id: '8275' file_name: 2020_NatureComm_Kavcic.pdf file_size: 1965672 relation: main_file success: 1 file_date_updated: 2020-08-17T07:36:57Z has_accepted_license: '1' intvolume: ' 11' isi: 1 language: - iso: eng month: '08' oa: 1 oa_version: Published Version pmid: 1 project: - _id: 25E9AF9E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P27201-B22 name: Revealing the mechanisms underlying drug interactions - _id: 254E9036-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P28844-B27 name: Biophysics of information processing in gene regulation publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '8657' relation: dissertation_contains status: public scopus_import: '1' status: public title: Mechanisms of drug interactions between translation-inhibiting antibiotics 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: 11 year: '2020' ... --- _id: '7673' abstract: - lang: eng text: Combining drugs can improve the efficacy of treatments. However, predicting the effect of drug combinations is still challenging. The combined potency of drugs determines the drug interaction, which is classified as synergistic, additive, antagonistic, or suppressive. While probabilistic, non-mechanistic models exist, there is currently no biophysical model that can predict antibiotic interactions. Here, we present a physiologically relevant model of the combined action of antibiotics that inhibit protein synthesis by targeting the ribosome. This model captures the kinetics of antibiotic binding and transport, and uses bacterial growth laws to predict growth in the presence of antibiotic combinations. We find that this biophysical model can produce all drug interaction types except suppression. We show analytically that antibiotics which cannot bind to the ribosome simultaneously generally act as substitutes for one another, leading to additive drug interactions. Previously proposed null expectations for higher-order drug interactions follow as a limiting case of our model. We further extend the model to include the effects of direct physical or allosteric interactions between individual drugs on the ribosome. Notably, such direct interactions profoundly change the combined drug effect, depending on the kinetic parameters of the drugs used. The model makes additional predictions for the effects of resistance genes on drug interactions and for interactions between ribosome-targeting antibiotics and antibiotics with other targets. These findings enhance our understanding of the interplay between drug action and cell physiology and are a key step toward a general framework for predicting drug interactions. article_processing_charge: No author: - first_name: Bor full_name: Kavcic, Bor id: 350F91D2-F248-11E8-B48F-1D18A9856A87 last_name: Kavcic orcid: 0000-0001-6041-254X - first_name: Gašper full_name: Tkačik, Gašper id: 3D494DCA-F248-11E8-B48F-1D18A9856A87 last_name: Tkačik orcid: 0000-0002-6699-1455 - first_name: Tobias full_name: Bollenbach, Tobias id: 3E6DB97A-F248-11E8-B48F-1D18A9856A87 last_name: Bollenbach orcid: 0000-0003-4398-476X citation: ama: Kavcic B, Tkačik G, Bollenbach MT. A minimal biophysical model of combined antibiotic action. bioRxiv. 2020. doi:10.1101/2020.04.18.047886 apa: Kavcic, B., Tkačik, G., & Bollenbach, M. T. (2020). A minimal biophysical model of combined antibiotic action. bioRxiv. https://doi.org/10.1101/2020.04.18.047886 chicago: Kavcic, Bor, Gašper Tkačik, and Mark Tobias Bollenbach. “A Minimal Biophysical Model of Combined Antibiotic Action.” BioRxiv, 2020. https://doi.org/10.1101/2020.04.18.047886. ieee: B. Kavcic, G. Tkačik, and M. T. Bollenbach, “A minimal biophysical model of combined antibiotic action,” bioRxiv. 2020. ista: Kavcic B, Tkačik G, Bollenbach MT. 2020. A minimal biophysical model of combined antibiotic action. bioRxiv, 10.1101/2020.04.18.047886. mla: Kavcic, Bor, et al. “A Minimal Biophysical Model of Combined Antibiotic Action.” BioRxiv, 2020, doi:10.1101/2020.04.18.047886. short: B. Kavcic, G. Tkačik, M.T. Bollenbach, BioRxiv (2020). das_tickbox: '1' date_created: 2020-04-22T08:27:56Z date_published: 2020-04-18T00:00:00Z date_updated: 2026-08-12T22:30:59Z day: '18' department: - _id: GaTk doi: 10.1101/2020.04.18.047886 language: - iso: eng main_file_link: - open_access: '1' url: 'https://doi.org/10.1101/2020.04.18.047886 ' month: '04' oa: 1 oa_version: Preprint project: - _id: 25E9AF9E-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P27201-B22 name: Revealing the mechanisms underlying drug interactions - _id: 254E9036-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: P28844-B27 name: Biophysics of information processing in gene regulation publication: bioRxiv publication_status: published related_material: record: - id: '8997' relation: later_version status: public - id: '8657' relation: dissertation_contains status: public status: public title: A minimal biophysical model of combined antibiotic action type: preprint user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ... --- _id: '8532' abstract: - lang: eng text: The molecular anatomy of synapses defines their characteristics in transmission and plasticity. Precise measurements of the number and distribution of synaptic proteins are important for our understanding of synapse heterogeneity within and between brain regions. Freeze–fracture replica immunogold electron microscopy enables us to analyze them quantitatively on a two-dimensional membrane surface. Here, we introduce Darea software, which utilizes deep learning for analysis of replica images and demonstrate its usefulness for quick measurements of the pre- and postsynaptic areas, density and distribution of gold particles at synapses in a reproducible manner. We used Darea for comparing glutamate receptor and calcium channel distributions between hippocampal CA3-CA1 spine synapses on apical and basal dendrites, which differ in signaling pathways involved in synaptic plasticity. We found that apical synapses express a higher density of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors and a stronger increase of AMPA receptors with synaptic size, while basal synapses show a larger increase in N-methyl-D-aspartate (NMDA) receptors with size. Interestingly, AMPA and NMDA receptors are segregated within postsynaptic sites and negatively correlated in density among both apical and basal synapses. In the presynaptic sites, Cav2.1 voltage-gated calcium channels show similar densities in apical and basal synapses with distributions consistent with an exclusion zone model of calcium channel-release site topography. acknowledgement: "This research was funded by Austrian Academy of Sciences, DOC fellowship to D.K., European Research\r\nCouncil Advanced Grant 694539 and European Union Human Brain Project (HBP) SGA2 785907 to R.S.\r\nWe acknowledge Elena Hollergschwandtner for technical support." article_number: '6737' article_processing_charge: No article_type: original author: - first_name: David full_name: Kleindienst, David id: 42E121A4-F248-11E8-B48F-1D18A9856A87 last_name: Kleindienst - first_name: Jacqueline-Claire full_name: Montanaro-Punzengruber, Jacqueline-Claire id: 3786AB44-F248-11E8-B48F-1D18A9856A87 last_name: Montanaro-Punzengruber - first_name: Pradeep full_name: Bhandari, Pradeep id: 45EDD1BC-F248-11E8-B48F-1D18A9856A87 last_name: Bhandari orcid: 0000-0003-0863-4481 - first_name: Matthew J full_name: Case, Matthew J id: 44B7CA5A-F248-11E8-B48F-1D18A9856A87 last_name: Case - first_name: Yugo full_name: Fukazawa, Yugo last_name: Fukazawa - first_name: Ryuichi full_name: Shigemoto, Ryuichi id: 499F3ABC-F248-11E8-B48F-1D18A9856A87 last_name: Shigemoto orcid: 0000-0001-8761-9444 citation: ama: Kleindienst D, Montanaro-Punzengruber J-C, Bhandari P, Case MJ, Fukazawa Y, Shigemoto R. Deep learning-assisted high-throughput analysis of freeze-fracture replica images applied to glutamate receptors and calcium channels at hippocampal synapses. International Journal of Molecular Sciences. 2020;21(18). doi:10.3390/ijms21186737 apa: Kleindienst, D., Montanaro-Punzengruber, J.-C., Bhandari, P., Case, M. J., Fukazawa, Y., & Shigemoto, R. (2020). Deep learning-assisted high-throughput analysis of freeze-fracture replica images applied to glutamate receptors and calcium channels at hippocampal synapses. International Journal of Molecular Sciences. MDPI. https://doi.org/10.3390/ijms21186737 chicago: Kleindienst, David, Jacqueline-Claire Montanaro-Punzengruber, Pradeep Bhandari, Matthew J Case, Yugo Fukazawa, and Ryuichi Shigemoto. “Deep Learning-Assisted High-Throughput Analysis of Freeze-Fracture Replica Images Applied to Glutamate Receptors and Calcium Channels at Hippocampal Synapses.” International Journal of Molecular Sciences. MDPI, 2020. https://doi.org/10.3390/ijms21186737. ieee: D. Kleindienst, J.-C. Montanaro-Punzengruber, P. Bhandari, M. J. Case, Y. Fukazawa, and R. Shigemoto, “Deep learning-assisted high-throughput analysis of freeze-fracture replica images applied to glutamate receptors and calcium channels at hippocampal synapses,” International Journal of Molecular Sciences, vol. 21, no. 18. MDPI, 2020. ista: Kleindienst D, Montanaro-Punzengruber J-C, Bhandari P, Case MJ, Fukazawa Y, Shigemoto R. 2020. Deep learning-assisted high-throughput analysis of freeze-fracture replica images applied to glutamate receptors and calcium channels at hippocampal synapses. International Journal of Molecular Sciences. 21(18), 6737. mla: Kleindienst, David, et al. “Deep Learning-Assisted High-Throughput Analysis of Freeze-Fracture Replica Images Applied to Glutamate Receptors and Calcium Channels at Hippocampal Synapses.” International Journal of Molecular Sciences, vol. 21, no. 18, 6737, MDPI, 2020, doi:10.3390/ijms21186737. short: D. Kleindienst, J.-C. Montanaro-Punzengruber, P. Bhandari, M.J. Case, Y. Fukazawa, R. Shigemoto, International Journal of Molecular Sciences 21 (2020). corr_author: '1' date_created: 2020-09-20T22:01:35Z date_published: 2020-09-14T00:00:00Z date_updated: 2026-08-12T22:31:01Z day: '14' ddc: - '570' department: - _id: RySh doi: 10.3390/ijms21186737 ec_funded: 1 external_id: isi: - '000579945300001' file: - access_level: open_access checksum: 2e4f62f3cfe945b7391fc3070e5a289f content_type: application/pdf creator: dernst date_created: 2020-09-21T14:08:58Z date_updated: 2020-09-21T14:08:58Z file_id: '8551' file_name: 2020_JournMolecSciences_Kleindienst.pdf file_size: 5748456 relation: main_file success: 1 file_date_updated: 2020-09-21T14:08:58Z has_accepted_license: '1' intvolume: ' 21' isi: 1 issue: '18' language: - iso: eng month: '09' oa: 1 oa_version: Published Version project: - _id: 25CA28EA-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '694539' name: 'In situ analysis of single channel subunit composition in neurons: physiological implication in synaptic plasticity and behaviour' - _id: 25D32BC0-B435-11E9-9278-68D0E5697425 name: Mechanism of formation and maintenance of input side-dependent asymmetry in the hippocampus - _id: 26436750-B435-11E9-9278-68D0E5697425 call_identifier: H2020 grant_number: '785907' name: Human Brain Project Specific Grant Agreement 2 publication: International Journal of Molecular Sciences publication_identifier: eissn: - 1422-0067 issn: - 1661-6596 publication_status: published publisher: MDPI quality_controlled: '1' related_material: record: - id: '9562' relation: dissertation_contains status: public scopus_import: '1' status: public title: Deep learning-assisted high-throughput analysis of freeze-fracture replica images applied to glutamate receptors and calcium channels at hippocampal synapses 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: 21 year: '2020' ... --- OA_place: repository OA_type: green _id: '7426' abstract: - lang: eng text: This paper presents a novel abstraction technique for analyzing Lyapunov and asymptotic stability of polyhedral switched systems. A polyhedral switched system is a hybrid system in which the continuous dynamics is specified by polyhedral differential inclusions, the invariants and guards are specified by polyhedral sets and the switching between the modes do not involve reset of variables. A finite state weighted graph abstracting the polyhedral switched system is constructed from a finite partition of the state–space, such that the satisfaction of certain graph conditions, such as the absence of cycles with product of weights on the edges greater than (or equal) to 1, implies the stability of the system. However, the graph is in general conservative and hence, the violation of the graph conditions does not imply instability. If the analysis fails to establish stability due to the conservativeness in the approximation, a counterexample (cycle with product of edge weights greater than or equal to 1) indicating a potential reason for the failure is returned. Further, a more precise approximation of the switched system can be constructed by considering a finer partition of the state–space in the construction of the finite weighted graph. We present experimental results on analyzing stability of switched systems using the above method. article_number: '100856' article_processing_charge: No article_type: original author: - first_name: Miriam full_name: Garcia Soto, Miriam id: 4B3207F6-F248-11E8-B48F-1D18A9856A87 last_name: Garcia Soto orcid: 0000−0003−2936−5719 - first_name: Pavithra full_name: Prabhakar, Pavithra last_name: Prabhakar citation: ama: 'Garcia Soto M, Prabhakar P. Abstraction based verification of stability of polyhedral switched systems. Nonlinear Analysis: Hybrid Systems. 2020;36(5). doi:10.1016/j.nahs.2020.100856' apa: 'Garcia Soto, M., & Prabhakar, P. (2020). Abstraction based verification of stability of polyhedral switched systems. Nonlinear Analysis: Hybrid Systems. Elsevier. https://doi.org/10.1016/j.nahs.2020.100856' chicago: 'Garcia Soto, Miriam, and Pavithra Prabhakar. “Abstraction Based Verification of Stability of Polyhedral Switched Systems.” Nonlinear Analysis: Hybrid Systems. Elsevier, 2020. https://doi.org/10.1016/j.nahs.2020.100856.' ieee: 'M. Garcia Soto and P. Prabhakar, “Abstraction based verification of stability of polyhedral switched systems,” Nonlinear Analysis: Hybrid Systems, vol. 36, no. 5. Elsevier, 2020.' ista: 'Garcia Soto M, Prabhakar P. 2020. Abstraction based verification of stability of polyhedral switched systems. Nonlinear Analysis: Hybrid Systems. 36(5), 100856.' mla: 'Garcia Soto, Miriam, and Pavithra Prabhakar. “Abstraction Based Verification of Stability of Polyhedral Switched Systems.” Nonlinear Analysis: Hybrid Systems, vol. 36, no. 5, 100856, Elsevier, 2020, doi:10.1016/j.nahs.2020.100856.' short: 'M. Garcia Soto, P. Prabhakar, Nonlinear Analysis: Hybrid Systems 36 (2020).' corr_author: '1' date_created: 2020-02-02T23:00:59Z date_published: 2020-05-01T00:00:00Z date_updated: 2026-07-28T12:57:27Z day: '01' ddc: - '000' department: - _id: ToHe doi: 10.1016/j.nahs.2020.100856 external_id: isi: - '000528828600003' file: - access_level: open_access checksum: 560abfddb53f9fe921b6744f59f2cfaa content_type: application/pdf creator: dernst date_created: 2020-10-21T13:16:45Z date_updated: 2022-05-16T22:30:04Z embargo: 2022-05-15 file_id: '8688' file_name: 2020_NAHS_GarciaSoto.pdf file_size: 818774 relation: main_file file_date_updated: 2022-05-16T22:30:04Z has_accepted_license: '1' intvolume: ' 36' isi: 1 issue: '5' language: - iso: eng license: https://creativecommons.org/licenses/by-nc-nd/4.0/ month: '05' oa: 1 oa_version: Submitted Version project: - _id: 25863FF4-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: S11407 name: Game Theory - _id: 25F42A32-B435-11E9-9278-68D0E5697425 call_identifier: FWF grant_number: Z211 name: Formal methods for the design and analysis of complex systems publication: 'Nonlinear Analysis: Hybrid Systems' publication_identifier: issn: - 1751-570X publication_status: published publisher: Elsevier quality_controlled: '1' scopus_import: '1' status: public title: Abstraction based verification of stability of polyhedral switched systems 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: 36 year: '2020' ... --- OA_place: repository OA_type: green _id: '8707' abstract: - lang: eng text: Dynamic changes in the three-dimensional (3D) organization of chromatin are associated with central biological processes, such as transcription, replication and development. Therefore, the comprehensive identification and quantification of these changes is fundamental to understanding of evolutionary and regulatory mechanisms. Here, we present Comparison of Hi-C Experiments using Structural Similarity (CHESS), an algorithm for the comparison of chromatin contact maps and automatic differential feature extraction. We demonstrate the robustness of CHESS to experimental variability and showcase its biological applications on (1) interspecies comparisons of syntenic regions in human and mouse models; (2) intraspecies identification of conformational changes in Zelda-depleted Drosophila embryos; (3) patient-specific aberrant chromatin conformation in a diffuse large B-cell lymphoma sample; and (4) the systematic identification of chromatin contact differences in high-resolution Capture-C data. In summary, CHESS is a computationally efficient method for the comparison and classification of changes in chromatin contact data. acknowledgement: 'Work in the Vaquerizas laboratory is funded by the Max Planck Society, the Deutsche Forschungsgemeinschaft (DFG) Priority Programme SPP 2202 ‘Spatial Genome Architecture in Development and Disease’ (project no. 422857230 to J.M.V.), the DFG Clinical Research Unit CRU326 ‘Male Germ Cells: from Genes to Function’ (project no. 329621271 to J.M.V.), the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement no. 643062—ZENCODE-ITN to J.M.V.) and the Medical Research Council in the UK. This research was partially funded by the European Union’s H2020 Framework Programme through the European Research Council (grant no. 609989 to M.A.M.-R.). We thank the support of the Spanish Ministerio de Ciencia, Innovación y Universidades through grant no. BFU2017-85926-P to M.A.M.-R. The Centre for Genomic Regulation thanks the support of the Ministerio de Ciencia, Innovación y Universidades to the European Molecular Biology Laboratory partnership, the ‘Centro de Excelencia Severo Ochoa 2013–2017’, agreement no. SEV-2012-0208, the CERCA Programme/Generalitat de Catalunya, Spanish Ministerio de Ciencia, Innovación y Universidades through the Instituto de Salud Carlos III, the Generalitat de Catalunya through the Departament de Salut and Departament d’Empresa i Coneixement and cofinancing by the Spanish Ministerio de Ciencia, Innovación y Universidades with funds from the European Regional Development Fund corresponding to the 2014–2020 Smart Growth Operating Program. S.G. thanks the support from the Company of Biologists (grant no. JCSTF181158) and the European Molecular Biology Organization Short-Term Fellowship programme.' article_processing_charge: No article_type: original author: - first_name: Silvia full_name: ' Galan, Silvia' last_name: ' Galan' - first_name: Nick N full_name: Machnik, Nick N id: 3591A0AA-F248-11E8-B48F-1D18A9856A87 last_name: Machnik orcid: 0000-0001-6617-9742 - first_name: Kai full_name: Kruse, Kai last_name: Kruse - first_name: Noelia full_name: Díaz, Noelia last_name: Díaz - first_name: Marc A full_name: Marti-Renom, Marc A last_name: Marti-Renom - first_name: Juan M full_name: Vaquerizas, Juan M last_name: Vaquerizas citation: ama: Galan S, Machnik NN, Kruse K, Díaz N, Marti-Renom MA, Vaquerizas JM. CHESS enables quantitative comparison of chromatin contact data and automatic feature extraction. Nature Genetics. 2020;52:1247-1255. doi:10.1038/s41588-020-00712-y apa: Galan, S., Machnik, N. N., Kruse, K., Díaz, N., Marti-Renom, M. A., & Vaquerizas, J. M. (2020). CHESS enables quantitative comparison of chromatin contact data and automatic feature extraction. Nature Genetics. Springer Nature. https://doi.org/10.1038/s41588-020-00712-y chicago: Galan, Silvia, Nick N Machnik, Kai Kruse, Noelia Díaz, Marc A Marti-Renom, and Juan M Vaquerizas. “CHESS Enables Quantitative Comparison of Chromatin Contact Data and Automatic Feature Extraction.” Nature Genetics. Springer Nature, 2020. https://doi.org/10.1038/s41588-020-00712-y. ieee: S. Galan, N. N. Machnik, K. Kruse, N. Díaz, M. A. Marti-Renom, and J. M. Vaquerizas, “CHESS enables quantitative comparison of chromatin contact data and automatic feature extraction,” Nature Genetics, vol. 52. Springer Nature, pp. 1247–1255, 2020. ista: Galan S, Machnik NN, Kruse K, Díaz N, Marti-Renom MA, Vaquerizas JM. 2020. CHESS enables quantitative comparison of chromatin contact data and automatic feature extraction. Nature Genetics. 52, 1247–1255. mla: Galan, Silvia, et al. “CHESS Enables Quantitative Comparison of Chromatin Contact Data and Automatic Feature Extraction.” Nature Genetics, vol. 52, Springer Nature, 2020, pp. 1247–55, doi:10.1038/s41588-020-00712-y. short: S. Galan, N.N. Machnik, K. Kruse, N. Díaz, M.A. Marti-Renom, J.M. Vaquerizas, Nature Genetics 52 (2020) 1247–1255. date_created: 2020-10-25T23:01:20Z date_published: 2020-10-19T00:00:00Z date_updated: 2026-08-12T22:31:05Z day: '19' department: - _id: FyKo doi: 10.1038/s41588-020-00712-y external_id: isi: - '000579693500004' pmid: - '33077914' intvolume: ' 52' isi: 1 language: - iso: eng main_file_link: - open_access: '1' url: https://pmc.ncbi.nlm.nih.gov/articles/PMC7610641/ month: '10' oa: 1 oa_version: Submitted Version page: 1247-1255 pmid: 1 publication: Nature Genetics publication_identifier: eissn: - 1546-1718 issn: - 1061-4036 publication_status: published publisher: Springer Nature quality_controlled: '1' related_material: record: - id: '18642' relation: dissertation_contains status: public scopus_import: '1' status: public title: CHESS enables quantitative comparison of chromatin contact data and automatic feature extraction type: journal_article user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 volume: 52 year: '2020' ... --- _id: '7680' abstract: - lang: eng text: "Proteins and their complex dynamic interactions regulate cellular mechanisms from sensing and transducing extracellular signals, to mediating genetic responses, and sustaining or changing cell morphology. To manipulate these protein-protein interactions (PPIs) that govern the behavior and fate of cells, synthetically constructed, genetically encoded tools provide the means to precisely target proteins of interest (POIs), and control their subcellular localization and activity in vitro and in vivo. Ideal synthetic tools react to an orthogonal cue, i.e. a trigger that does not activate any other endogenous process, thereby allowing manipulation of the POI alone.\r\nIn optogenetics, naturally occurring photosensory domain from plants, algae and bacteria are re-purposed and genetically fused to POIs. Illumination with light of a specific wavelength triggers a conformational change that can mediate PPIs, such as dimerization or oligomerization. By using light as a trigger, these tools can be activated with high spatial and temporal precision, on subcellular and millisecond scales. Chemogenetic tools consist of protein domains that recognize and bind small molecules. By genetic fusion to POIs, these domains can mediate PPIs upon addition of their specific ligands, which are often synthetically designed to provide highly specific interactions and exhibit good bioavailability.\r\nMost optogenetic tools to mediate PPIs are based on well-studied photoreceptors responding to red, blue or near-UV light, leaving a striking gap in the green band of the visible light spectrum. Among both optogenetic and chemogenetic tools, there is an abundance of methods to induce PPIs, but tools to disrupt them require UV illumination, rely on covalent linkage and subsequent enzymatic cleavage or initially result in protein clustering of unknown stoichiometry.\r\nThis work describes how the recently structurally and photochemically characterized green-light responsive cobalamin-binding domains (CBDs) from bacterial transcription factors were re-purposed to function as a green-light responsive optogenetic tool. In contrast to previously engineered optogenetic tools, CBDs do not induce PPI, but rather confer a PPI already upon expression, which can be rapidly disrupted by illumination. This was employed to mimic inhibition of constitutive activity of a growth factor receptor, and successfully implement for cell signalling in mammalian cells and in vivo to rescue development in zebrafish. This work further describes the development and application of a chemically induced de-dimerizer (CDD) based on a recently identified and structurally described bacterial oxyreductase. CDD forms a dimer upon expression in absence of its cofactor, the flavin derivative F420. Safety and of domain expression and ligand exposure are demonstrated in vitro and in vivo in zebrafish. The system is further applied to inhibit cell signalling output from a chimeric receptor upon F420 treatment.\r\nCBDs and CDD expand the repertoire of synthetic tools by providing novel mechanisms of mediating PPIs, and by recognizing previously not utilized cues. In the future, they can readily be combined with existing synthetic tools to functionally manipulate PPIs in vitro and in vivo." alternative_title: - ISTA Thesis article_processing_charge: No author: - first_name: Stephanie full_name: Kainrath, Stephanie id: 32CFBA64-F248-11E8-B48F-1D18A9856A87 last_name: Kainrath orcid: 0000-0002-6709-2195 citation: ama: Kainrath S. Synthetic tools for optogenetic and chemogenetic inhibition of cellular signals. 2020. doi:10.15479/AT:ISTA:7680 apa: Kainrath, S. (2020). Synthetic tools for optogenetic and chemogenetic inhibition of cellular signals. Institute of Science and Technology Austria. https://doi.org/10.15479/AT:ISTA:7680 chicago: Kainrath, Stephanie. “Synthetic Tools for Optogenetic and Chemogenetic Inhibition of Cellular Signals.” Institute of Science and Technology Austria, 2020. https://doi.org/10.15479/AT:ISTA:7680. ieee: S. Kainrath, “Synthetic tools for optogenetic and chemogenetic inhibition of cellular signals,” Institute of Science and Technology Austria, 2020. ista: Kainrath S. 2020. Synthetic tools for optogenetic and chemogenetic inhibition of cellular signals. Institute of Science and Technology Austria. mla: Kainrath, Stephanie. Synthetic Tools for Optogenetic and Chemogenetic Inhibition of Cellular Signals. Institute of Science and Technology Austria, 2020, doi:10.15479/AT:ISTA:7680. short: S. Kainrath, Synthetic Tools for Optogenetic and Chemogenetic Inhibition of Cellular Signals, Institute of Science and Technology Austria, 2020. corr_author: '1' date_created: 2020-04-24T16:00:51Z date_published: 2020-04-24T00:00:00Z date_updated: 2026-08-12T09:19:22Z day: '24' ddc: - '570' degree_awarded: PhD department: - _id: CaGu doi: 10.15479/AT:ISTA:7680 file: - access_level: open_access checksum: fb9a4468eb27be92690728e35c823796 content_type: application/pdf creator: stgingl date_created: 2020-04-28T11:19:21Z date_updated: 2021-10-31T23:30:05Z embargo: 2021-10-30 file_id: '7692' file_name: Thesis_without-signatures_PDFA.pdf file_size: 3268017 relation: main_file - access_level: closed checksum: f6c80ca97104a631a328cb79a2c53493 content_type: application/octet-stream creator: stgingl date_created: 2020-04-28T11:19:24Z date_updated: 2021-10-31T23:30:05Z embargo_to: open_access file_id: '7693' file_name: Thesis_without signatures.docx file_size: 5167703 relation: source_file file_date_updated: 2021-10-31T23:30:05Z has_accepted_license: '1' language: - iso: eng month: '04' oa: 1 oa_version: None page: '98' publication_identifier: eissn: - 2663-337X publication_status: published publisher: Institute of Science and Technology Austria related_material: record: - id: '1028' relation: dissertation_contains status: public status: public supervisor: - first_name: Harald L full_name: Janovjak, Harald L id: 33BA6C30-F248-11E8-B48F-1D18A9856A87 last_name: Janovjak orcid: 0000-0002-8023-9315 title: Synthetic tools for optogenetic and chemogenetic inhibition of cellular signals type: dissertation user_id: 2DF688A6-F248-11E8-B48F-1D18A9856A87 year: '2020' ...