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Protein Page:
MUC1 (human)

Overview
MUC1 a large cell surface glycoprotein expressed by most glandular and ductal epithelial cells and some hematopoietic cell lineages. Plays a role in adhesion and cell-cell interactions, metastasis and signaling. May provide a protective layer on epithelial surfaces. Direct or indirect interaction with actin cytoskeleton. Its cytoplasmic tail (MUC1CT) is involved in several signaling pathways, including those involving Ras, beta-catenin, p120 catenin, p53 and estrogen receptor alpha. MUC1CT also forms complexes with transcription factors, and then translocates to the nucleus by an unknown mechanism, where it is believed to influence the transcription of their target genes. MUC1CT has also been proposed to localize to mitochondrial membranes under conditions of genotoxic stress, where it attenuates the apoptotic pathway in response and confers resistance to apoptosis-inducing drugs. Aberrantly glycosylated forms expressed in human epithelial tumors, such as breast or ovarian cancer and also in non-epithelial tumor cells. Nine alternatively spliced isoforms have been described. Isoforms 5 and 9 are secreted. Isoform 7, expressed only in tumor cells, is a receptor and binds the secreted isoform 5. The binding induces the phosphorylation of the isoform 7, alters cellular morphology and initiates cell signaling. Can bind to GRB2 adapter protein. Note: This description may include information from UniProtKB.
Protein type: Actin-binding; Cell adhesion; Membrane protein, integral; Motility/polarity/chemotaxis; Nuclear receptor co-regulator; Tumor suppressor
Chromosomal Location of Human Ortholog: 1q21
Cellular Component: extracellular space; Golgi lumen; integral to plasma membrane; nuclear chromatin; vesicle
Molecular Function: p53 binding; protein binding; transcription cofactor activity
Biological Process: DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; DNA damage response, signal transduction by p53 class mediator resulting in transcription of p21 class mediator; negative regulation of cell adhesion mediated by integrin; O-glycan processing; regulation of transcription from RNA polymerase II promoter in response to stress
Disease: Medullary Cystic Kidney Disease 1
Reference #:  P15941 (UniProtKB)
Alt. Names/Synonyms: Breast carcinoma-associated antigen DF3; Carcinoma-associated mucin; CD227; DF3 antigen; EMA; Episialin; H23 antigen; H23AG; KL-6; MAM6; MUC-1; MUC-1/SEC; MUC-1/X; MUC1; MUC1-alpha; MUC1-beta; MUC1-CT; MUC1-NT; MUC1/ZD; mucin 1, cell surface associated; mucin 1, transmembrane; Mucin-1; Mucin-1 subunit alpha; Mucin-1 subunit beta; Peanut-reactive urinary mucin; PEM; PEMT; Polymorphic epithelial mucin; PUM; tumor associated epithelial mucin; Tumor-associated epithelial membrane antigen; Tumor-associated mucin
Gene Symbols: MUC1
Molecular weight: 122,102 Da
Basal Isoelectric point: 6.96  Predict pI for various phosphorylation states
CST Pathways:  ErbB/HER Signaling
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
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MUC1

Protein Structure Not Found.
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