Rabbit anti-Human APC Monoclonal Antibody

Uniprot Id

Q15116

Target Species

Human

Target Name

PDCD1

Target Full Name

Programmed cell death protein 1

Target Function

Inhibitory receptor on antigen activated T-cells that plays a critical role in induction and maintenance of immune tolerance to self. Delivers inhibitory signals upon binding to ligands CD274/PDCD1L1 and CD273/PDCD1LG2. Following T-cell receptor (TCR) engagement, PDCD1 associates with CD3-TCR in the immunological synapse and directly inhibits T-cell activation. Suppresses T-cell activation through the recruitment of PTPN11/SHP-2: following ligand-binding, PDCD1 is phosphorylated within the ITSM motif, leading to the recruitment of the protein tyrosine phosphatase PTPN11/SHP-2 that mediates dephosphorylation of key TCR proximal signaling molecules, such as ZAP70, PRKCQ/PKCtheta and CD247/CD3zeta.; The PDCD1-mediated inhibitory pathway is exploited by tumors to attenuate anti-tumor immunity and escape destruction by the immune system, thereby facilitating tumor survival. The interaction with CD274/PDCD1L1 inhibits cytotoxic T lymphocytes (CTLs) effector function. The blockage of the PDCD1-mediated pathway results in the reversal of the exhausted T-cell phenotype and the normalization of the anti-tumor response, providing a rationale for cancer immunotherapy.

Target Involvement

Systemic lupus erythematosus 2 (SLEB2)

Target Subcellular Location

Cell membrane; Single-pass type I membrane protein.

Target Research Area

Cell Biology

Target Synonyms

CD279; CD279 antigen; hPD 1; hPD l; hPD-1; hSLE1; PD 1; PD-1; PD1; PDCD 1; PDCD1; PDCD1_HUMAN; Programmed cell death 1 ; Programmed cell death 1 protein; Programmed cell death protein 1; Protein PD 1; Protein PD-1; SLEB2 ; Systemic lupus erythematosus susceptibility 2

Target Background

Programmed cell death protein 1 (PDCD1) is an immune-inhibitory receptor expressed in activated T cells; it is involved in the regulation of T-cell functions, including those of effector CD8+ T cells. In addition, this protein can also promote the differentiation of CD4+ T cells into T regulatory cells. PDCD1 is expressed in many types of tumors including melanomas, and has demonstrated to play a role in anti-tumor immunity. Moreover, this protein has been shown to be involved in safeguarding against autoimmunity, however, it can also contribute to the inhibition of effective anti-tumor and anti-microbial immunity.