Involvement of a Jumonji-C domain-containing histone demethylase in DRM2-mediated maintenance of DNA methylation.
Histone demethylases-both lysine-specific demethylase 1 (LSD1) and Jumonji-C (JmjC) domain-containing proteins-are broadly implicated in the regulation of chromatin-dependent processes. In Arabidopsis thaliana, histone marks directly affect DNA methylation, and mutations in LSD1 homologues show reduced DNA methylation at some loci. We screened transfer DNA mutations in genes encoding JmjC domains for defects in DNA methylation. Mutations in jmj14 result in reduced DNA methylation in non-CG contexts at targets of DRM2 (domains rearranged methyltransferase 2)-mediated RNA-directed DNA methylation (RdDM), which is associated with an increase in H3K4m3. Unlike other components of RdDM, JMJ14 is not required for de novo methylation of a transgene, suggesting that JMJ14 is specifically involved in the maintenance phase of DRM2-mediated RdDM.
Department of Molecular, Cell, and Developmental Biology, University of California at Los Angeles, 90095-723905, USA.
Angelique
A
Deleris
Maxim V C
MV
Greenberg
Israel
I
Ausin
Rona W Y
RW
Law
Guillaume
G
Moissiard
Daniel
D
Schubert
Steven E
SE
Jacobsen
D017360:Arabidopsis / Q000201:enzymology* / Q000235:genetics*; D029681:Arabidopsis Proteins / Q000378:metabolism*; D002843:Chromatin / Q000378:metabolism; D047369:Chromatin Immunoprecipitation; D019175:DNA Methylation / Q000235:genetics*; D005816:Genetic Complementation Test; D056426:Genetic Loci / Q000235:genetics; D006657:Histones / Q000378:metabolism; D056484:Jumonji Domain-Containing Histone Demethylases / Q000378:metabolism*; D008239:Lysine / Q000378:metabolism; D008780:Methyltransferases / Q000378:metabolism*; D008954:Models, Biological; D009154:Mutation / Q000235:genetics; D018749:RNA, Plant / Q000378:metabolism
D029681:Arabidopsis Proteins; D002843:Chromatin; D006657:Histones; D018749:RNA, Plant; C549618:JMJ14 protein, Arabidopsis; D056484:Jumonji Domain-Containing Histone Demethylases; D008780:Methyltransferases; C470732:DRM2 protein, Arabidopsis; D008239:Lysine