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Title: H3K36 methylation is critical for brassinosteroid-regulated plant growth and development in rice .
Author: Sui P Jin J Ye S Mu C Gao J Feng H Shen WH Yu Y Dong A
Journal: Plant J Citation: V : 70 P : 340-7 Year: 2012 Type: MEDLINE
Literature: oryza Field: abstract Doc ID: pub22136623 Accession (PMID): 22136623
Abstract: Methylation of histone lysine residues plays an essential role in epigenetic regulation of gene expression in eukaryotes . Enzymes involved in establishment of the repressive H3K9 and H3K27 methylation marks have been previously characterized , but the deposition and function of H3K4 and H3K36 methylation remain uncharacterized in rice . Here , we report that rice SDG725 encodes a H3K36 methyltransferase , and its down-regulation causes wide-ranging defects , including dwarfism , shortened internodes , erect leaves and small seeds . These defects resemble the phenotypes previously described for some brassinosteroid-knockdown mutants . Consistently , transcriptome analyses revealed that SDG725 depletion results in down-regulation by more than two-fold of over 1000 genes , including D11 , BRI1 and BU1 , which are known to be involved in brassinosteroid biosynthesis or signaling pathways . Chromatin immunoprecipitation analyses showed that levels of H3K36me2/3 are reduced in chromatin at some regions of these brassinosteroid-related genes in SDG725 knockdown plants , and that SDG725 protein is able to directly bind to these target genes . Taken together , our data indicate that SDG725-mediated H3K36 methylation modulates brassinosteroid-related gene expression , playing an important role in rice plant growth and development .
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[ Sen. 6, subscore: 2.00 ]: Chromatin immunoprecipitation analyses showed that levels of H3K36me2/3 are reduced in chromatin at some regions of these brassinosteroid-related genes in SDG725 knockdown plants , and that SDG725 protein is able to directly bind to these target genes .
[ Sen. 3, subscore: 1.00 ]: Here , we report that rice SDG725 encodes a H3K36 methyltransferase , and its down-regulation causes wide-ranging defects , including dwarfism , shortened internodes , erect leaves and small seeds .
[ Sen. 5, subscore: 1.00 ]: Consistently , transcriptome analyses revealed that SDG725 depletion results in down-regulation by more than two-fold of over 1000 genes , including D11 , BRI1 and BU1 , which are known to be involved in brassinosteroid biosynthesis or signaling pathways .
[ Sen. 7, subscore: 1.00 ]: Taken together , our data indicate that SDG725-mediated H3K36 methylation modulates brassinosteroid-related gene expression , playing an important role in rice plant growth and development .
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