HES1
Protein-coding gene in the species Homo sapiens / From Wikipedia, the free encyclopedia
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Transcription factor HES1 (hairy and enhancer of split-1) is a protein that is encoded by the Hes1 gene, and is the mammalian homolog of the hairy gene in Drosophila.[5][6] HES1 is one of the seven members of the Hes gene family (HES1-7). Hes genes code nuclear proteins that suppress transcription.[7]
This protein belongs to the basic helix-loop-helix (bHLH) family of transcription factors. It is a transcriptional repressor of genes that require a bHLH protein for their transcription. The protein has a particular type of basic domain that contains a helix interrupting protein that binds to the N-box promoter region rather than the canonical enhancer box (E-box).[6] As a member of the bHLH family, it is a transcriptional repressor that influences cell proliferation and differentiation in embryogenesis.[7] HES1 regulates its own expression via a negative feedback loop, and oscillates with approximately 2-hour periodicity.[8]