Author/Authors :
Michiel Vermeulen، نويسنده , , H. Christian Eberl، نويسنده , , Filomena Matarese، نويسنده , , Hendrik Marks، نويسنده , , Sergei Denissov، نويسنده , , Falk Butter، نويسنده , , Kenneth K. Lee، نويسنده , , Jesper V. Olsen، نويسنده , , Anthony A. Hyman and Stephen C. Harrison، نويسنده , , Henk G. Stunnenberg، نويسنده , , Matthias Mann، نويسنده ,
Abstract :
Trimethyl-lysine (me3) modifications on histones are the most stable epigenetic marks and they control chromatin-mediated regulation of gene expression. Here, we determine proteins that bind these marks by high-accuracy, quantitative mass spectrometry. These chromatin “readers” are assigned to complexes by interaction proteomics of full-length BAC-GFP-tagged proteins. ChIP-Seq profiling identifies their genomic binding sites, revealing functional properties. Among the main findings, the human SAGA complex binds to H3K4me3 via a double Tudor-domain in the C terminus of Sgf29, and the PWWP domain is identified as a putative H3K36me3 binding motif. The ORC complex, including LRWD1, binds to the three most prominent transcriptional repressive lysine methylation sites. Our data reveal a highly adapted interplay between chromatin marks and their associated protein complexes. Reading specific trimethyl-lysine sites by specialized complexes appears to be a widespread mechanism to mediate gene expression.
