Q14469 

HES1 is a member of the basic helix-loop-helix family of transcription factors. It is a transcriptional repressor of genes that require a bHLH protein for their transcription. HES1 plays a crucial role in the regulation of myogenesis and neurogenesis, functioning as a transcriptional repressor within the Notch signaling pathway. This pathway is essential for proper cell differentiation and development, particularly during embryogenesis, where HES1 helps control segmentation and neural development. HES1, along with its family members, forms a complex with TLE proteins, which are the mammalian homologs of the Drosophila groucho proteins. This interaction is mediated by the carboxy-terminal WRPW motif of the HES proteins, allowing the HES/TLE complex to bind directly to DNA and regulate gene expression without interfering with activator proteins.