title: Dynamics of Srf, p300 and histone modifications during cardiac maturation in mouse.
abstract: The adaptation of the cellular network to functional changes, timing and patterning of gene expression is regulated by binding of transcription factors to gene regulatory elements, which in turn depends on co-occurring histone modifications. These two layers influence each other, enabling a further level of regulatory fine-tuning. We analyzed the interdependencies between histone 3 acetylation, histone 3 lysine 4 dimethylation, the transcription factor Srf and the histone acetyltransferase p300 in an in vivo model using chromatin immunoprecipitation in a time-series during cardiac maturation in mouse. We found a strong correlation between the presence of the two histone modifications and binding of Srf and p300. Using linear modeling techniques we could show that each factor contributes individually as well as conjointly to histone 3 acetylation and gene expression, probably aided by accompanying histone 3 lysine 4 dimethylation. We further demonstrate that changes in gene expression during cardiac maturation are attended by changes of the analyzed regulators while revealing a high variability of combinatorial regulation. Finally, we propose a model of Srf-driven gene expression in cardiomyocytes.
authors.affiliation: Department of Vertebrate Genomics, Max Planck Institute for Molecular Genetics, Berlin, Germany.
authors.forename: Markus
authors.initials: M
authors.lastname: Schueler
authors.forename: Qin
authors.initials: Q
authors.lastname: Zhang
authors.forename: Jenny
authors.initials: J
authors.lastname: Schlesinger
authors.forename: Martje
authors.initials: M
authors.lastname: Tönjes
authors.forename: Silke R
authors.initials: SR
authors.lastname: Sperling
mesh_terms: D000107:Acetylation; D000818:Animals; D002460:Cell Line; D047369:Chromatin Immunoprecipitation / Q000379:methods; D004247:DNA / Q000378:metabolism; D050881:E1A-Associated p300 Protein / Q000378:metabolism*; D018507:Gene Expression Regulation, Developmental; D006321:Heart / Q000196:embryology*; D006657:Histones / Q000378:metabolism*; D008745:Methylation; D051379:Mice; D032383:Myocytes, Cardiac / Q000378:metabolism; D011401:Promoter Regions, Genetic; D011499:Protein Processing, Post-Translational; D012333:RNA, Messenger / Q000096:biosynthesis; D026362:Serum Response Factor / Q000378:metabolism*; D014158:Transcription, Genetic; D015533:Transcriptional Activation
chemical_list: D006657:Histones; D012333:RNA, Messenger; D026362:Serum Response Factor; D004247:DNA; D050881:E1A-Associated p300 Protein; C494361:Ep300 protein, mouse