CD86

CD86

The protein CD86 (Cluster of Differentiation 86) is a molecule expressed on antigen-presenting cells that provide costimulatory signals necessary for T cell activation and survival. It is the ligand for two proteins at the cell surface of T cells, CD28 antigen and CTLA-4 (cytotoxic T-lymphocyte-associated protein 4). CD86 is also known as B7.2. Its principal mode of action is by binding to CD28. Along with CD80, these molecules provide the necessary stimuli to prime T cells against antigens presented by antigen-presenting cells.

This gene encodes a type I membrane protein that is a member of the immunoglobulin superfamily. Binding of this protein with CD28 antigen is a costimulatory signal for activation of the T-cell. Binding of this protein with CTLA-4 negatively regulates T-cell activation and diminishes the immune response. Alternative splicing results in two transcript variants encoding different isoforms. Additional transcript variants have been described, but their full-length sequences have not been determined. [cite web | title = Entrez Gene: CD86 CD86 molecule| url = http://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=942| accessdate = ]

ee also

* Cluster of differentiation

References

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