Anti-14-3-3

YWHAQ, also known as 14-3-3 tau (14-3-3tau) is a a phosphoserine-binding protein and a member of the 14-3-3 family of proteins. The 14-3-3 family members are dimeric phosphoserine/ phosphothreonine-binding proteins, which are involved in a very diverse spectrum of signaling pathways. YWHAQ plays a critical role in the regulation of E2F1 stability. It binds to Ser31-phosphorylated E2F1 and inhibits the ubiquitination of E2F1 during DNA damage. The binding of YWHAQ to E2F1 interferes with the function of an E31 ligase and therefore inhibits the ubiquitination and degradation of E2F1. This interaction is required for the expression and induction of several E2F1 apoptotic target genes as well as apoptosis during DNA damage. Protein function: Adapter protein implicated in the regulation of a large spectrum of both general and specialized signaling pathways. Binds to a large number of partners, usually by recognition of a phosphoserine or phosphothreonine motif. Binding generally results in the modulation of the activity of the binding partner. Negatively regulates the kinase activity of PDPK1. [The UniProt Consortium]