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A structural-maintenance-of-chromosomes hinge domain–containing protein is required for RNA-directed DNA methylation
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Kanno, Tatsuo, Bucher, Etienne, Daxinger, Lucia, Huettel, Bruno, Böhmdorfer, Gudrun, Gregor, Wolfgang, Kreil, David, Matzke, Marjori and Matzke, Antonius J M (2008) A structural-maintenance-of-chromosomes hinge domain–containing protein is required for RNA-directed DNA methylation. Nature Genetics, Vol.40 (No.5). pp. 670-675. doi:10.1038/ng.119 ISSN 1061-4036.
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Official URL: http://dx.doi.org/10.1038/ng.119
Abstract
RNA-directed DNA methylation (RdDM) is a process in which dicer-generated small RNAs guide de novo cytosine methylation at the homologous DNA region1, 2. To identify components of the RdDM machinery important for Arabidopsis thaliana development, we targeted an enhancer active in meristems for methylation, which resulted in silencing of a downstream GFP reporter gene. This silencing system also features secondary siRNAs, which trigger methylation that spreads beyond the targeted enhancer region. A screen for mutants defective in meristem silencing and enhancer methylation retrieved six dms complementation groups, which included the known factors DRD1 (ref. 3; a SNF2-like chromatin-remodeling protein) and Pol IVb subunits4, 5. Additionally, we identified a previously unknown gene DMS3 (At3g49250), encoding a protein similar to the hinge-domain region of structural maintenance of chromosomes (SMC) proteins. This finding implicates a putative chromosome architectural protein that can potentially link nucleic acids6 in facilitating an RNAi-mediated epigenetic modification involving secondary siRNAs and spreading of DNA methylation.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) | ||||
Journal or Publication Title: | Nature Genetics | ||||
Publisher: | Nature Publishing Group | ||||
ISSN: | 1061-4036 | ||||
Official Date: | 20 April 2008 | ||||
Dates: |
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Volume: | Vol.40 | ||||
Number: | No.5 | ||||
Page Range: | pp. 670-675 | ||||
DOI: | 10.1038/ng.119 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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