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Journal Article
Research Support, Non-U.S. Gov't
Trrap-dependent histone acetylation specifically regulates cell-cycle gene transcription to control neural progenitor fate decisions.
Cell Stem Cell 2014 May 2
Fate decisions in neural progenitor cells are orchestrated via multiple pathways, and the role of histone acetylation in these decisions has been ascribed to a general function promoting gene activation. Here, we show that the histone acetyltransferase (HAT) cofactor transformation/transcription domain-associated protein (Trrap) specifically regulates activation of cell-cycle genes, thereby integrating discrete cell-intrinsic programs of cell-cycle progression and epigenetic regulation of gene transcription in order to control neurogenesis. Deletion of Trrap impairs recruitment of HATs and transcriptional machinery specifically to E2F cell-cycle target genes, disrupting their transcription with consequent cell-cycle lengthening specifically within cortical apical neural progenitors (APs). Consistently, Trrap conditional mutants exhibit microcephaly because of premature differentiation of APs into intermediate basal progenitors and neurons, and overexpressing cell-cycle regulators in vivo can rescue these premature differentiation defects. These results demonstrate an essential and highly specific role for Trrap-mediated histone regulation in controlling cell-cycle progression and neurogenesis.
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