CD279 (PD-1) RealYellow 655 (RMP1-30, Rat) - Reactivity: Mouse

The RMP1-30 monoclonal antibody specifically recognizes CD279 which is also known as PD-1 (programmed death-1). CD279 (PD-1) is a ~55 kDa type I transmembrane glycoprotein that is encoded by Pdcd1 which belongs to the CD28/CTLA-4 family within the Ig superfamily. CD279 (PD-1) is comprised of an extracellular region with an IgV-like domain and an intracellular region with an immunoreceptor tyrosine-based inhibitory motif (ITIM) and an immunoreceptor tyrosine-based switch motif (ITSM) that are associated with inhibitory signaling functions. CD279 (PD-1) is transiently expressed on CD4-CD8- thymocytes and developing B lymphocytes at the pro-B-cell stage. It is also expressed on activated myeloid cells, B cells, and T cells including exhausted T cells found in mice during chronic viral infections or cancer. This co-inhibitory receptor reportedly functions in negative regulation of immune responses and thus helps guard against autoimmunity and preserves peripheral tolerance. CD273 (also known as PD-L2 or B7-DC) and CD274 (PD-L1 or B7-H1) are members of the B7 family within the Ig superfamily that serve as ligands for CD279 (PD-1). The RMP1-30 antibody reportedly does not block the binding of CD279 (PD-1) to these ligands.