JMJ14, a JmjC domain protein, is required for RNA silencing and cell-to-cell movement of an RNA silencing signal in Arabidopsis.
JMJ14 is a histone H3 Lys4 (H3K4) trimethyl demethylase that affects mobile RNA silencing in an Arabidopsis transgene system. It also influences CHH DNA methylation, abundance of endogenous transposon transcripts, and flowering time. JMJ14 acts at a point in RNA silencing pathways that is downstream from RNA-dependent RNA polymerase 2 (RDR2) and Argonaute 4 (AGO4). Our results illustrate a link between RNA silencing and demethylation of histone H3 trimethylysine. We propose that JMJ14 acts downstream from the Argonaute effector complex to demethylate histone H3K4 at the target of RNA silencing.
Searle
Iain R
IR
Plant Sciences Department, Cambridge University, Cambridge, United Kingdom.
Pontes
Olga
O
Melnyk
Charles W
CW
Smith
Lisa M
LM
Baulcombe
David C
DC
D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D002843:Chromatin / Q000235:genetics; D019175:DNA Methylation / Q000235:genetics; D035264:Flowers / Q000235:genetics; D005816:Genetic Complementation Test; D056484:Jumonji Domain-Containing Histone Demethylases / Q000235:genetics / Q000378:metabolism*; D009154:Mutation / Q000235:genetics; D017440:Photoperiod; D034622:RNA Interference / Q000502:physiology*; D015398:Signal Transduction / Q000502:physiology*
D029681:Arabidopsis Proteins; D002843:Chromatin; C549618:JMJ14 protein, Arabidopsis; D056484:Jumonji Domain-Containing Histone Demethylases