Recognizes a protein of 32kDa, identified as CD8a (also known as CD8 chain, T cell co-receptor, Leu2, and T8). CD8 molecule consists of two chains, termed and chain, which are expressed as a disulphide-linked heterodimer or as an homodimer. CD8 is expressed on T cell subset (cytotoxic/suppressor T cells), thymocytes and NK cells. The majority of CD8+ T-cells expresses CD8 as heterodimer. Some subpopulation of CD8+ T cells as well as NK cells may express homodimer. CD8 functions as a co-receptor in concert with TCR for binding the MHC class I/peptide complex. The HIV-2 envelope glycoprotein binds CD8 chain (but not chain). The cytoplasmic domain of CD8 associates with p56lck tyrosine kinase.
Knapp W. et. al. Leukocyte Typing IV, p342-343, Oxford University Press, 1989 | Parnes JR, CD4 and CD8 in T cell lineage commitment: alterations induced by expression of a CD8/CD4 chimeric transgene. Semin Immunol 1994, 6:221-229. | Delon J. et al. CD8 expression allows T cell signaling by monomeric peptide-MHC complexes. Immunity 1998, 9(4):467-73 | Akimoto H, et al. Binding of HIV-2 envelope glycoprotein to CD8 molecules and related chemokine production. Immunology 1998, 95(2):214-218 | Leahy DJ. A structural view of CD4 and CD8. FASEB J. 1995,9(1):17-25. | Jonker M et al. Side effects and immunogenicity of murine lymphocyte-specific monoclonal antibodies in subhuman primates. Transplantation 1988, 45(4):677-682
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