Description
Product Characteristics:
KIR3DL1 (NKB1, CD158e1) is expressed on a subset of natural killer cells and T cells. NKB1 is a 70 kD member of the immunoglobulin superfamily that is expressed at varying levels among individuals. NKB1 is a type I membrane protein containing two immunoglobulin C2 type domains. The interaction of NKB1 with specific HLA B antigens on a target cell (the HLA Bw4 allele, for example) inhibits cytotoxicity and prevents target cell lysis and death. The interactions between KIR and MHC class I are thought to be important in NK and T cell regulation following antigen stimulation. The absence of ligands for KIRs may lower the threshold for activation through activating receptors and increase inflammation and susceptibility to autoimmune disease.
Subcellular location: Extracellular, Cell membrane
Synonyms: KIR3DL1, Killer cell immunoglobulin-like receptor 3DL1, AMB11, CD158 antigen-like family member E, CD158E, CD158e antigen, CD158E1, CD158E1/2, CD158E2, CL11, CL2, HLA-BW4-specic inhibitory NK cell receptor, killer cell immunoglobulin like receptor, Killer cell immunoglobulin like receptor three domains, short cytoplasmic tail, 1, Killer cell immunoglobulin like receptor three domains long cytoplasmic tail 1, KIR, KIR antigen 3DL1, KIR G1, KIR3DS1, Kirl1, Kirl2, Krl1, MGC119726, MGC119728, MGC126589, MGC126591, MHC class I NK cell receptor, Natural killer associated transcript 3, Natural killer cell inhibitory receptor, NK receptor, NK-associated transcript 10, NK-associated transcript 3, NK-associated transcript 3delIg1, NKAT10, NKAT3, NKB1, NKB1B, p70 killer cell inhibitory receptor, p70 natural killer cell receptor clones CL 2/CL 11, KI3L1_MOUSE.
Target Information: 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