title: A new class of C. elegans synMuv genes implicates a Tip60/NuA4-like HAT complex as a negative regulator of Ras signaling.
abstract: The class A and class B synMuv genes are functionally redundant negative regulators of a Ras signaling pathway that induces C. elegans vulval development. A number of class B synMuv genes encode components of an Rb and histone deacetylase complex that likely acts to repress transcription of genes required for vulval induction. We discovered a new class of synMuv genes that acts redundantly with both the A and B classes of genes in vulval cell-fate determination. These new class C synMuv genes encode TRRAP, MYST family histone acetyltransferase, and Enhancer of Polycomb homologs, which form a putative C. elegans Tip60/NuA4-like histone acetyltransferase complex. A fourth gene with partial class C synMuv properties encodes a homolog of the mammalian SWI/SNF family ATPase p400. Our findings indicate that the coordinated action of two chromatin-modifying complexes, one with histone deacetylase and the other with histone acetyltransferase activity, is important in regulating Ras signaling and specifying cell fates during C. elegans development.
authors.affiliation: Howard Hughes Medical Institute, Department of Biology, 68-425, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Ceol
authors.forename: H R
authors.initials: HR
authors.lastname: Horvitz
mesh_terms: D000123:Acetyltransferases / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D048868:Adaptor Proteins, Signal Transducing; D000251:Adenosine Triphosphatases / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D000818:Animals; D017173:Caenorhabditis elegans / Q000166:cytology / Q000235:genetics* / Q000254:growth & development*; D029742:Caenorhabditis elegans Proteins / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism*; D019070:Cell Lineage / Q000235:genetics; D002868:Chromosomal Proteins, Non-Histone / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D018076:DNA, Complementary / Q000032:analysis / Q000235:genetics; D005260:Female; D018507:Gene Expression Regulation, Developmental / Q000235:genetics*; D051548:Histone Acetyltransferases; D006655:Histone Deacetylases / Q000235:genetics / Q000302:isolation & purification; D000074443:Lysine Acetyltransferase 5; D046911:Macromolecular Substances; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism; D012097:Repressor Proteins; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D015534:Trans-Activators / Q000235:genetics / Q000302:isolation & purification / Q000378:metabolism*; D014157:Transcription Factors; D014844:Vulva / Q000166:cytology / Q000254:growth & development / Q000378:metabolism; D018631:ras Proteins / Q000235:genetics / Q000378:metabolism*
chemical_list: D048868:Adaptor Proteins, Signal Transducing; D029742:Caenorhabditis elegans Proteins; D002868:Chromosomal Proteins, Non-Histone; D018076:DNA, Complementary; C486134:EPC-1 protein, C elegans; C485469:EPC1 protein, human; D046911:Macromolecular Substances; D008562:Membrane Glycoproteins; D009687:Nuclear Proteins; D012097:Repressor Proteins; C486132:TRR-1 protein, C elegans; D015534:Trans-Activators; D014157:Transcription Factors; C113829:transformation-transcription domain-associated protein; D000123:Acetyltransferases; D051548:Histone Acetyltransferases; C098489:KAT5 protein, human; D000074443:Lysine Acetyltransferase 5; C486133:MYS-1 protein, C elegans; D006655:Histone Deacetylases; D000251:Adenosine Triphosphatases; C486135:SSL-1 protein, C elegans; D018631:ras Proteins