Antagonism between MES-4 and Polycomb repressive complex 2 promotes appropriate gene expression in C. elegans germ cells.
Antagonism between MES-4 and Polycomb repressive complex 2 promotes appropriate gene expression in C. elegans germ cells.
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DOI:
10.1016/j.celrep.2012.09.019
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发表时间:
2012-11-29
期刊:
影响因子:
8.8
通讯作者:
Strome S
中科院分区:
文献类型:
--
作者:
Gaydos LJ;Rechtsteiner A;Egelhofer TA;Carroll CR;Strome S
The C. elegans MES proteins are key chromatin regulators of the germline. MES-2, MES-3, and MES-6 form the C. elegans Polycomb Repressive Complex 2 and generate repressive H3K27me3. MES-4 generates H3K36me3 on germline-expressed genes. Transcript profiling of dissected mutant germlines revealed that MES-2/3/6 and MES-4 cooperate to promote expression of germline genes and silence the X chromosomes and somatic genes. Based on genome-wide chromatin immunoprecipitation, H3K27me3 and H3K36me3 occupy mutually exclusive domains on the autosomes and H3K27me3 is enriched on the X. Loss of MES-4 from germline genes causes H3K27me3 to spread to germline genes, resulting in reduced H3K27me3 elsewhere on the autosomes and especially on the X. Our findings support a model in which H3K36me3 repels H3K27me3 from germline genes and concentrates it on other regions of the genome. This antagonism ensures proper patterns of gene expression for germ cells, which includes silencing somatic genes and the X chromosomes.
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