CDB20:0002862 PCNA — NCR2
Experimentally validated in Human; Orthology-inferred in Rat, Frog, Chicken, Macaque, Pig, Dog, Chimp, Horse, Marmoset
Title
Journal:; Year Published:
Abstract
Proliferating cell nuclear antigen is a novel inhibitory ligand for the natural cytotoxicity receptor NKp44.
Journal of immunology, 2011; PubMed, Homo sapiens PCNA — Homo sapiens NCR2
ABSTRACT: NK cells play an important role in the early immune response to cancer. The NKp44 activating receptor is the only natural cytotoxicity receptor that is expressed exclusively by primate NK cells, yet its cellular ligands remain largely unknown. Proliferating cell nuclear Ag (PCNA) is overexpressed in cancer cells. In this study, we show that the NKp44 receptor recognizes PCNA. Their interaction inhibits NK cell function through NKp44/ITIM. The physical interaction of NKp44 and PCNA is enabled by recruitment of target cell PCNA to the NK immunological synapse. We demonstrate that PCNA promotes cancer survival by immune evasion through inhibition of NKp44-mediated NK cell attack.