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- W4377098340 abstract "Summary Transcription coactivators are proteins or protein complexes that mediate transcription factor (TF) function. However, they lack DNA binding capacity, prompting the question of how they engage target loci. Three non-exclusive hypotheses have been posited: coactivators are recruited by complexing with TFs, by binding histones through epigenetic reader domains, or by partitioning into phase-separated compartments through their extensive intrinsically disordered regions (IDRs). Using p300 as a prototypical coactivator, we systematically mutated its annotated domains and show by single-molecule tracking in live cells that coactivator– chromatin binding depends entirely on combinatorial binding of multiple TF-interaction domains. Furthermore, we demonstrate that acetyltransferase activity negatively impacts p300–chromatin association and that the N-terminal TF-interaction domains regulate that activity. Single TF-interaction domains are insufficient for both chromatin binding and regulation of catalytic activity, implying a principle that could broadly inform eukaryotic gene regulation: a TF must act in coordination with other TFs to recruit coactivator activity." @default.
- W4377098340 created "2023-05-20" @default.
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- W4377098340 date "2023-05-18" @default.
- W4377098340 modified "2023-10-03" @default.
- W4377098340 title "p300 Is an Obligate Integrator of Combinatorial Transcription Factor Inputs" @default.
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- W4377098340 doi "https://doi.org/10.1101/2023.05.18.541220" @default.
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