---
_id: '9455'
abstract:
- lang: eng
text: Proteins of the ARGONAUTE family are important in diverse posttranscriptional
RNA-mediated gene-silencing systems as well as in transcriptional gene silencing
in Drosophila and fission yeast and in programmed DNA elimination in Tetrahymena.
We cloned ARGONAUTE4 (AGO4) from a screen for mutants that suppress silencing
of the Arabidopsis SUPERMAN(SUP) gene. The ago4-1 mutant reactivated silentSUP
alleles and decreased CpNpG and asymmetric DNA methylation as well as histone
H3 lysine-9 methylation. In addition,ago4-1 blocked histone and DNA methylation
and the accumulation of 25-nucleotide small interfering RNAs (siRNAs) that correspond
to the retroelement AtSN1. These results suggest that AGO4 and long siRNAs direct
chromatin modifications, including histone methylation and non-CpG DNA methylation.
article_processing_charge: No
article_type: original
author:
- first_name: Daniel
full_name: Zilberman, Daniel
id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
last_name: Zilberman
orcid: 0000-0002-0123-8649
- first_name: ' Xiaofeng'
full_name: Cao, Xiaofeng
last_name: Cao
- first_name: Steven E.
full_name: Jacobsen, Steven E.
last_name: Jacobsen
citation:
ama: Zilberman D, Cao Xiaofeng, Jacobsen SE. ARGONAUTE4 control of locus-specific
siRNA accumulation and DNA and histone methylation. Science. 2003;299(5607):716-719.
doi:10.1126/science.1079695
apa: Zilberman, D., Cao, Xiaofeng, & Jacobsen, S. E. (2003). ARGONAUTE4 control
of locus-specific siRNA accumulation and DNA and histone methylation. Science.
American Association for the Advancement of Science. https://doi.org/10.1126/science.1079695
chicago: Zilberman, Daniel, Xiaofeng Cao, and Steven E. Jacobsen. “ARGONAUTE4 Control
of Locus-Specific SiRNA Accumulation and DNA and Histone Methylation.” Science.
American Association for the Advancement of Science, 2003. https://doi.org/10.1126/science.1079695.
ieee: D. Zilberman, Xiaofeng Cao, and S. E. Jacobsen, “ARGONAUTE4 control of locus-specific
siRNA accumulation and DNA and histone methylation,” Science, vol. 299,
no. 5607. American Association for the Advancement of Science, pp. 716–719, 2003.
ista: Zilberman D, Cao Xiaofeng, Jacobsen SE. 2003. ARGONAUTE4 control of locus-specific
siRNA accumulation and DNA and histone methylation. Science. 299(5607), 716–719.
mla: Zilberman, Daniel, et al. “ARGONAUTE4 Control of Locus-Specific SiRNA Accumulation
and DNA and Histone Methylation.” Science, vol. 299, no. 5607, American
Association for the Advancement of Science, 2003, pp. 716–19, doi:10.1126/science.1079695.
short: D. Zilberman, Xiaofeng Cao, S.E. Jacobsen, Science 299 (2003) 716–719.
date_created: 2021-06-04T11:26:26Z
date_published: 2003-01-31T00:00:00Z
date_updated: 2021-12-14T08:43:30Z
day: '31'
department:
- _id: DaZi
doi: 10.1126/science.1079695
extern: '1'
external_id:
pmid:
- '12522258'
intvolume: ' 299'
issue: '5607'
keyword:
- Multidisciplinary
language:
- iso: eng
month: '01'
oa_version: None
page: 716-719
pmid: 1
publication: Science
publication_identifier:
eissn:
- 1095-9203
issn:
- 0036-8075
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
scopus_import: '1'
status: public
title: ARGONAUTE4 control of locus-specific siRNA accumulation and DNA and histone
methylation
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 299
year: '2003'
...
---
_id: '9495'
abstract:
- lang: eng
text: RNA interference is a conserved process in which double-stranded RNA is processed
into 21–25 nucleotide siRNAs that trigger posttranscriptional gene silencing.
In addition, plants display a phenomenon termed RNA-directed DNA methylation (RdDM)
in which DNA with sequence identity to silenced RNA is de novo methylated at its
cytosine residues. This methylation is not only at canonical CpG sites but also
at cytosines in CpNpG and asymmetric sequence contexts. In this report, we study
the role of the DRM and CMT3 DNA methyltransferase genes in the initiation and
maintenance of RdDM. Neither drm nor cmt3 mutants affected the maintenance of
preestablished RNA-directed CpG methylation. However, drm mutants showed a nearly
complete loss of asymmetric methylation and a partial loss of CpNpG methylation.
The remaining asymmetric and CpNpG methylation was dependent on the activity of
CMT3, showing that DRM and CMT3 act redundantly to maintain non-CpG methylation.
These DNA methyltransferases appear to act downstream of siRNAs, since drm1 drm2
cmt3 triple mutants show a lack of non-CpG methylation but elevated levels of
siRNAs. Finally, we demonstrate that DRM activity is required for the initial
establishment of RdDM in all sequence contexts including CpG, CpNpG, and asymmetric
sites.
article_processing_charge: No
article_type: original
author:
- first_name: Xiaofeng
full_name: Cao, Xiaofeng
last_name: Cao
- first_name: Werner
full_name: Aufsatz, Werner
last_name: Aufsatz
- first_name: Daniel
full_name: Zilberman, Daniel
id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
last_name: Zilberman
orcid: 0000-0002-0123-8649
- first_name: M.Florian
full_name: Mette, M.Florian
last_name: Mette
- first_name: Michael S.
full_name: Huang, Michael S.
last_name: Huang
- first_name: Marjori
full_name: Matzke, Marjori
last_name: Matzke
- first_name: Steven E.
full_name: Jacobsen, Steven E.
last_name: Jacobsen
citation:
ama: Cao X, Aufsatz W, Zilberman D, et al. Role of the DRM and CMT3 methyltransferases
in RNA-directed DNA methylation. Current Biology. 2003;13(24):2212-2217.
doi:10.1016/j.cub.2003.11.052
apa: Cao, X., Aufsatz, W., Zilberman, D., Mette, M. F., Huang, M. S., Matzke, M.,
& Jacobsen, S. E. (2003). Role of the DRM and CMT3 methyltransferases in RNA-directed
DNA methylation. Current Biology. Elsevier. https://doi.org/10.1016/j.cub.2003.11.052
chicago: Cao, Xiaofeng, Werner Aufsatz, Daniel Zilberman, M.Florian Mette, Michael
S. Huang, Marjori Matzke, and Steven E. Jacobsen. “Role of the DRM and CMT3 Methyltransferases
in RNA-Directed DNA Methylation.” Current Biology. Elsevier, 2003. https://doi.org/10.1016/j.cub.2003.11.052.
ieee: X. Cao et al., “Role of the DRM and CMT3 methyltransferases in RNA-directed
DNA methylation,” Current Biology, vol. 13, no. 24. Elsevier, pp. 2212–2217,
2003.
ista: Cao X, Aufsatz W, Zilberman D, Mette MF, Huang MS, Matzke M, Jacobsen SE.
2003. Role of the DRM and CMT3 methyltransferases in RNA-directed DNA methylation.
Current Biology. 13(24), 2212–2217.
mla: Cao, Xiaofeng, et al. “Role of the DRM and CMT3 Methyltransferases in RNA-Directed
DNA Methylation.” Current Biology, vol. 13, no. 24, Elsevier, 2003, pp.
2212–17, doi:10.1016/j.cub.2003.11.052.
short: X. Cao, W. Aufsatz, D. Zilberman, M.F. Mette, M.S. Huang, M. Matzke, S.E.
Jacobsen, Current Biology 13 (2003) 2212–2217.
date_created: 2021-06-07T10:43:02Z
date_published: 2003-12-16T00:00:00Z
date_updated: 2021-12-14T08:41:38Z
day: '16'
department:
- _id: DaZi
doi: 10.1016/j.cub.2003.11.052
extern: '1'
external_id:
pmid:
- '14680640'
intvolume: ' 13'
issue: '24'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://doi.org/10.1016/j.cub.2003.11.052
month: '12'
oa: 1
oa_version: Published Version
page: 2212-2217
pmid: 1
publication: Current Biology
publication_identifier:
eissn:
- 1879-0445
issn:
- 0960-9822
publication_status: published
publisher: Elsevier
quality_controlled: '1'
scopus_import: '1'
status: public
title: Role of the DRM and CMT3 methyltransferases in RNA-directed DNA methylation
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 13
year: '2003'
...
---
_id: '9444'
abstract:
- lang: eng
text: Epigenetic silenced alleles of the Arabidopsis SUPERMANlocus (the clark kent
alleles) are associated with dense hypermethylation at noncanonical cytosines
(CpXpG and asymmetric sites, where X = A, T, C, or G). A genetic screen for suppressors
of a hypermethylated clark kent mutant identified nine loss-of-function alleles
of CHROMOMETHYLASE3(CMT3), a novel cytosine methyltransferase homolog. These cmt3
mutants display a wild-type morphology but exhibit decreased CpXpG methylation
of the SUP gene and of other sequences throughout the genome. They also show reactivated
expression of endogenous retrotransposon sequences. These results show that a
non-CpG DNA methyltransferase is responsible for maintaining epigenetic gene silencing.
article_processing_charge: No
article_type: original
author:
- first_name: A. M.
full_name: Lindroth, A. M.
last_name: Lindroth
- first_name: Xiaofeng
full_name: Cao, Xiaofeng
last_name: Cao
- first_name: James P.
full_name: Jackson, James P.
last_name: Jackson
- first_name: Daniel
full_name: Zilberman, Daniel
id: 6973db13-dd5f-11ea-814e-b3e5455e9ed1
last_name: Zilberman
orcid: 0000-0002-0123-8649
- first_name: Claire M.
full_name: McCallum, Claire M.
last_name: McCallum
- first_name: Steven
full_name: Henikoff, Steven
last_name: Henikoff
- first_name: Steven E.
full_name: Jacobsen, Steven E.
last_name: Jacobsen
citation:
ama: Lindroth AM, Cao X, Jackson JP, et al. Requirement of CHROMOMETHYLASE3 for
maintenance of CpXpG methylation. Science. 2001;292(5524):2077-2080. doi:10.1126/science.1059745
apa: Lindroth, A. M., Cao, X., Jackson, J. P., Zilberman, D., McCallum, C. M., Henikoff,
S., & Jacobsen, S. E. (2001). Requirement of CHROMOMETHYLASE3 for maintenance
of CpXpG methylation. Science. American Association for the Advancement
of Science. https://doi.org/10.1126/science.1059745
chicago: Lindroth, A. M., Xiaofeng Cao, James P. Jackson, Daniel Zilberman, Claire
M. McCallum, Steven Henikoff, and Steven E. Jacobsen. “Requirement of CHROMOMETHYLASE3
for Maintenance of CpXpG Methylation.” Science. American Association for
the Advancement of Science, 2001. https://doi.org/10.1126/science.1059745.
ieee: A. M. Lindroth et al., “Requirement of CHROMOMETHYLASE3 for maintenance
of CpXpG methylation,” Science, vol. 292, no. 5524. American Association
for the Advancement of Science, pp. 2077–2080, 2001.
ista: Lindroth AM, Cao X, Jackson JP, Zilberman D, McCallum CM, Henikoff S, Jacobsen
SE. 2001. Requirement of CHROMOMETHYLASE3 for maintenance of CpXpG methylation.
Science. 292(5524), 2077–2080.
mla: Lindroth, A. M., et al. “Requirement of CHROMOMETHYLASE3 for Maintenance of
CpXpG Methylation.” Science, vol. 292, no. 5524, American Association for
the Advancement of Science, 2001, pp. 2077–80, doi:10.1126/science.1059745.
short: A.M. Lindroth, X. Cao, J.P. Jackson, D. Zilberman, C.M. McCallum, S. Henikoff,
S.E. Jacobsen, Science 292 (2001) 2077–2080.
date_created: 2021-06-02T13:35:16Z
date_published: 2001-06-15T00:00:00Z
date_updated: 2021-12-14T08:40:32Z
day: '15'
department:
- _id: DaZi
doi: 10.1126/science.1059745
extern: '1'
external_id:
pmid:
- '11349138'
intvolume: ' 292'
issue: '5524'
keyword:
- Multidisciplinary
language:
- iso: eng
month: '06'
oa_version: None
page: 2077-2080
pmid: 1
publication: Science
publication_identifier:
eissn:
- 1095-9203
issn:
- 0036-8075
publication_status: published
publisher: American Association for the Advancement of Science
quality_controlled: '1'
scopus_import: '1'
status: public
title: Requirement of CHROMOMETHYLASE3 for maintenance of CpXpG methylation
type: journal_article
user_id: 8b945eb4-e2f2-11eb-945a-df72226e66a9
volume: 292
year: '2001'
...