CD8A Antibodies

Target Information

Integral membrane glycoprotein that plays an essential role in the immune response and serves multiple functions in responses against both external and internal offenses. In T-cells, functions primarily as a coreceptor for MHC class I molecule:peptide complex. The antigens presented by class I peptides are derived from cytosolic proteins while class II derived from extracellular proteins. Interacts simultaneously with the T-cell receptor (TCR) and the MHC class I proteins presented by antigen presenting cells (APCs). In turn, recruits the Src kinase LCK to the vicinity of the TCR-CD3 complex. LCK then initiates different intracellular signaling pathways by phosphorylating various substrates ultimately leading to lymphokine production, motility, adhesion and activation of cytotoxic T-lymphocytes (CTLs). This mechanism enables CTLs to recognize and eliminate infected cells and tumor cells. In NK-cells, the presence of CD8A homodimers at the cell surface provides a survival mechanism allowing conjugation and lysis of multiple target cells. CD8A homodimer molecules also promote the survival and differentiation of activated lymphocytes into memory CD8 T-cells. CD8 on thymus-derived T-cells usually consists of a disulfide-linked alpha/CD8A and a beta/CD8B chain. Less frequently, CD8 can be expressed as a CD8A homodimer. A subset of natural killer cells, memory T-cells, intraepithelial lymphocytes, monocytes and dendritic cells expresses CD8A homo-dimers. Expressed at the cell surface of plasmacytoid dendritic cells upon herpes simplex virus-1 stimulation. 3 alternatively spliced human isoforms have been reported. Note: This description may include information from UniProtKB.

Alternate Names

BB154331; CD8; CD8 antigen alpha polypeptide; CD8 antigen, alpha chain; CD8 antigen, alpha polypeptide (p32); CD8A; Cd8a; CD8a molecule; Leu2; Leu2 T-lymphocyte antigen; Ly-; Ly-2; Ly-3; Ly-35; Ly-B; Lyt-; Lyt-2; Lyt-2.1 lymphocyte differentiation antigen (AA at 100); Lyt2; MAL; OKT8 T-cell antigen; p32; T cell co-receptor; T-cell antigen Leu2; T-cell surface glycoprotein CD8 alpha chain; T-cell surface glycoprotein Lyt-2; T-lymphocyte differentiation antigen T8/Leu-2; T8 T-cell antigen