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• W1994857515 endingPage "e1003195" @default.
• W1994857515 startingPage "e1003195" @default.
• W1994857515 abstract "The NK homeodomain factor Tinman is a crucial regulator of early mesoderm patterning and, together with the GATA factor Pannier and the Dorsocross T-box factors, serves as one of the key cardiogenic factors during specification and differentiation of heart cells. Although the basic framework of regulatory interactions driving heart development has been worked out, only about a dozen genes involved in heart development have been designated as direct Tinman target genes to date, and detailed information about the functional architectures of their cardiac enhancers is lacking. We have used immunoprecipitation of chromatin (ChIP) from embryos at two different stages of early cardiogenesis to obtain a global overview of the sequences bound by Tinman in vivo and their linked genes. Our data from the analysis of ~50 sequences with high Tinman occupancy show that the majority of such sequences act as enhancers in various mesodermal tissues in which Tinman is active. All of the dorsal mesodermal and cardiac enhancers, but not some of the others, require tinman function. The cardiac enhancers feature diverse arrangements of binding motifs for Tinman, Pannier, and Dorsocross. By employing these cardiac and non-cardiac enhancers in machine learning approaches, we identify a novel motif, termed CEE, as a classifier for cardiac enhancers. In vivo assays for the requirement of the binding motifs of Tinman, Pannier, and Dorsocross, as well as the CEE motifs in a set of cardiac enhancers, show that the Tinman sites are essential in all but one of the tested enhancers; although on occasion they can be functionally redundant with Dorsocross sites. The enhancers differ widely with respect to their requirement for Pannier, Dorsocross, and CEE sites, which we ascribe to their different position in the regulatory circuitry, their distinct temporal and spatial activities during cardiogenesis, and functional redundancies among different factor binding sites." @default.
• W1994857515 created "2016-06-24" @default.
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• W1994857515 creator A5080857815 @default.
• W1994857515 date "2013-01-10" @default.
• W1994857515 modified "2023-10-12" @default.
• W1994857515 title "Genome-Wide Screens for In Vivo Tinman Binding Sites Identify Cardiac Enhancers with Diverse Functional Architectures" @default.
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• W1994857515 doi "https://doi.org/10.1371/journal.pgen.1003195" @default.
• W1994857515 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3542182" @default.
• W1994857515 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23326246" @default.
• W1994857515 hasPublicationYear "2013" @default.
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