Target Information

CD86 is one of two ligands (the other CD80) for CTLA4 and CD28. CD86 acts as costimulatory molecule in eliciting T-cell help during antigen presentation. Antigen presentation in the absence of sufficient co-stimulation involving CD86/CD80 can induce tolerance. CD80 appears to play a role distinct from CD80 in T helper cell differentiation. CD86 is a type I membrane protein that is a member of the immunoglobulin superfamily. The CD86 protein is expressed by antigen-presenting cells, and it is the ligand for two proteins at the cell surface of T cells, CD28 antigen and cytotoxic T-lymphocyte-associated protein 4. Binding of CD86 with CD28 antigen is a costimulatory signal for activation of the T-cell. Binding of CD86 with cytotoxic T-lymphocyte-associated protein 4 negatively regulates T-cell activation and diminishes the immune response. Alternative splicing results in two transcript variants encoding different isoforms of CD86. Additional transcript variants have been described for CD86, but their full-length sequences have not been determined. Diseases associated with CD86 dysfunction include gallbladder squamous cell carcinoma and myocarditis.

Synonyms

activation B7-2 antigen; B lymphocyte activation antigen B72; B7; B7.2; B70; B7-2; B-lymphocyte activation antigen B7-2; BU63; CD28 antigen ligand 2; Cd28l2; CD28LG2; CD86; CD86 antigen; CD86 antigen (CD28 antigen ligand 2, B7-2 antigen); CD86 antigen precursor; CD86 molecule; CLS1; CTLA-4 counter-receptor B7.2; early T cell costimulatory molecule-1; early T-cell costimulatory molecule 1; Early T-cell co-stimulatory molecule 1; ETC-1; FUN-1; LAB72; Ly58; Ly-58; MB7; MB7-2; membrane glycoprotein; MGC34413; T-lymphocyte activation antigen CD86; TS/A-2