Document Detail

SPR-5 and MET-2 function cooperatively to reestablish an epigenetic ground state during passage through the germ line.
MedLine Citation:
PMID:  24979765     Owner:  NLM     Status:  In-Data-Review    
The Caenorhabditis elegans LSD1 H3K4me2 demethylase SPR-5 reprograms epigenetic transcriptional memory during passage through the germ line. Here we show that mutants in the H3K9me2 methyltransferase, met-2, result in transgenerational epigenetic effects that parallel spr-5 mutants. In addition, we find that spr-5;met-2 double mutants have a synergistic effect on sterility, H3K4me2, and spermatogenesis expression. These results implicate MET-2 as a second histone-modifying enzyme in germ-line reprogramming and suggest a model in which SPR-5 and MET-2 function cooperatively to reestablish an epigenetic ground state required for the continued immortality of the C. elegans germ line. Without SPR-5 and MET-2, we find that the ability to express spermatogenesis genes is transgenerationally passed on to the somatic cells of the subsequent generation. This indicates that H3K4me2 may act in the maintenance of cell fate. Finally, we demonstrate that reducing H3K4me2 causes a large increase in H3K9me2 added by the SPR-5;MET-2 reprogramming mechanism. This finding suggests a novel histone code interaction in which the input chromatin environment dictates the output chromatin state. Taken together, our results provide evidence for a broader reprogramming mechanism in which multiple enzymes coordinately regulate histone information during passage through the germ line.
Shana C Kerr; Chelsey Chandler Ruppersburg; Joshua W Francis; David J Katz
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Publication Detail:
Type:  Journal Article     Date:  2014-06-16
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  111     ISSN:  1091-6490     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  2014 Jul 
Date Detail:
Created Date:  2014-07-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9509-14     Citation Subset:  IM    
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