|Description: Mucin-1 precursor (MUC-1) (Polymorphic epithelial mucin) (PEM) (PEMT)(Episialin) (Tumor-associated mucin) (Carcinoma-associated mucin)(Tumor-associated epithelial membrane antigen) (EMA) (H23AG) (Peanut-reactive urinary mucin) (PUM) (Breast carcinoma-associated antigenDF3) (CD227 antigen) [Contains: Mucin-1 alpha subunit (MUC1-alpha)(MUC1-NT); Mucin-1 beta subunit (MUC1-beta) (MUC1-CT)].|
UniprotKB/SwissProt: MUC1_HUMAN (P15941)
Function: The alpha subunit has cell adhesive properties. Can act both as an adhesion and an anti-adhesion protein. May provide a protective layer on epithelial cells against bacterial and enzyme attack. The beta subunit contains a C-terminal domain which is involved in cell signaling, through phosphorylations and protein- protein interactions. Modulates signaling in ERK, Src and NF- kappaB pathways. In activated T-cells, influences directly or indirectly the Ras/MAPK pathway. Promotes tumor progression. Regulates P53-mediated transcription and determines cell fate in the genotoxic stress response. Binds, together with KLF4, the PE21 promoter element of P53 and represses P53 activity.
Other Modifications: View all modification sites in dbPTM
Protein Subcellular Localization: Apical cell membrane; Single-pass type I membrane protein. Note=Exclusively located in the apical domain of the plasma membrane of highly polarized epithelial cells. After endocytosis, internalized and recycled to the cell membrane. Located to microvilli