CD158a Antibody – Mouse Monoclonal

Killer cell immunoglobulin-like receptors (KIRs) are transmembrane glycoproteins expressed by natural killer cells and subsets of T cells. The KIR genes are polymorphic and highly homologous and they are found in a cluster on chromosome 19q13.4 within the 1 Mb leukocyte receptor complex (LRC). The gene content of the KIR gene cluster varies among haplotypes, although several "framework" genes are found in all haplotypes (KIR3DL3, KIR3DP1, KIR3DL4, KIR3DL2). The KIR proteins are classified by the number of extracellular immunoglobulin domains (2D or 3D) and by whether they have a long (L) or short (S) cytoplasmic domain. KIR proteins with the long cytoplasmic domain transduce inhibitory signals upon ligand binding via an immune tyrosine-based inhibitory motif (ITIM), while KIR proteins with the short cytoplasmic domain lack the ITIM motif and instead associate with the TYRO protein tyrosine kinase binding protein to transduce activating signals. The ligands for several KIR proteins are subsets of HLA class I molecules; thus, KIR proteins are thought to play an important role in regulation of the immune response. [provided by RefSeq, Jul 2008]

KIR2DL1: Receptor on natural killer (NK) cells for HLA-C alleles. Inhibits the activity of NK cells thus preventing cell lysis. Interacts with ARRB2. Interacts with PTPN6; the interaction is enhanced by ARRB2. Interacts with PTPN11; the interaction is enhanced by ARRB2. Belongs to the immunoglobulin superfamily.

Protein type: Receptor, misc.; Membrane protein, integral

Chromosomal Location of Human Ortholog: 19q13.4

Cellular Component: integral to plasma membrane; plasma membrane

Molecular Function: protein binding; receptor activity

Biological Process: regulation of immune response; natural killer cell inhibitory signaling pathway; immune response