Javascript is not enabled on this browser. This site will not work properly without Javascript.
PhosphoSitePlus Homepage Cell Signaling Technology
Home | Login
About PhosphoSiteUsing PhosphoSiteprivacy & cookiesCuration ProcessContact
logos LINCs Logo Mt Sinai Logo NIH Logo NCI Logo
Search / Browse Functions
Protein Page:

CD8A Identifies cytotoxic/suppressor T-cells that interact with MHC class I bearing targets. CD8 is thought to play a role in the process of T-cell mediated killing. CD8 alpha chains binds to class I MHC molecules alpha-3 domains. In general heterodimer of an alpha and a beta chain linked by two disulfide bonds. Can also form homodimers. Shown to be expressed as heterodimer on thymocytes and as homodimer on peripheral blood T-lymphocytes. Interacts with the MHC class I HLA-A/B2M dimer. Interacts with LCK in a zinc-dependent manner. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.
Protein type: Membrane protein, integral
Chromosomal Location of Human Ortholog: 2p11.2
Cellular Component: external side of plasma membrane; extracellular region; integral component of plasma membrane; plasma membrane; T cell receptor complex
Molecular Function: coreceptor activity; MHC class I protein binding; protein binding; protein homodimerization activity; protein kinase binding
Biological Process: antigen processing and presentation; cell surface receptor signaling pathway; cytotoxic T cell differentiation; defense response to virus; immune response; positive regulation of calcium-mediated signaling; regulation of immune response; T cell activation; T cell mediated immunity; transmembrane receptor protein tyrosine kinase signaling pathway
Disease: Cd8 Deficiency, Familial
Reference #:  P01732 (UniProtKB)
Alt. Names/Synonyms: CD8; CD8 antigen alpha polypeptide; CD8 antigen, alpha polypeptide (p32); CD8A; CD8a molecule; Leu2; Leu2 T-lymphocyte antigen; MAL; OKT8 T-cell antigen; p32; T cell co-receptor; T-cell antigen Leu2; T-cell surface glycoprotein CD8 alpha chain; T-lymphocyte differentiation antigen T8/Leu-2; T8 T-cell antigen
Gene Symbols: CD8A
Molecular weight: 25,729 Da
Basal Isoelectric point: 9.64  Predict pI for various phosphorylation states
Protein-Specific Antibodies or siRNAs from Cell Signaling Technology® Total Proteins
Select Structure to View Below


Protein Structure Not Found.
Download PyMol Script
Download ChimeraX Script

STRING  |  cBioPortal  |  Wikipedia  |  Reactome  |  neXtProt  |  Protein Atlas  |  BioGPS  |  Scansite  |  Pfam  |  RCSB PDB  |  Phospho3D  |  Phospho.ELM  |  GeneCards  |  UniProtKB  |  Entrez-Gene  |  GenPept  |  Ensembl Gene