The IPD-KIR Database provides a centralised repository for human KIR sequences. Killer-cell Immunoglobulin-like Receptors (KIR) have been shown to be highly polymorphic at the allelic and haplotypic level.

KIR-ligands can be grouped into three major categories based on the KIR-binding epitope in HLA-C and HLA-B. Most HLA-C alleles are of the C1 or C2 group (2) and most HLA-B alleles can be classified as either Bw4 or Bw6 (3).

2019年5月27日 · In turn, NK cell clones were fundamental for the discovery of both killer immunoglobulin-like receptors (KIRs) and natural cytotoxicity receptors (NCRs), the two most important steps toward unraveling NK cell function.

KIR inhibitory receptors signal through their immunoreceptor tyrosine-based inhibitory motif (ITIM) in their cytoplasmic domain. When inhibitory KIR receptors bind to a ligand, their ITIMs are tyrosine phosphorylated and protein tyrosine phosphatases, including SHP-1, are recruited.

2021年2月2日 · 杀伤细胞免疫球蛋白样受体（KIRs）在记忆性T细胞和NK细胞上表达，是NK细胞功能的关键调节因子。 KIR及其配体MHC-I类（HLA-A、-B、-C）分子具有高度多态性，特殊的相互作用会影响一些疾病的发生率、进展和结果，如妊娠并发症、病毒感染、自身免疫性疾病和血液系统恶性肿瘤。 因此，深入了解KIR-MHC-I类相互作用的分子机制有助于疾病的治疗策略。 NK细胞受体与配体. 根据基因表型与数量，KIRs分为两种单倍型 (haplotype)：A和B。 A单倍型包 …

2024年2月28日 · 杀伤细胞免疫球蛋白样受体（Killer Cell Immunoglobulin-like Receptors, KIR，即CD158）是一个由14个多态性基因编码的受体家族（KIR2DL1 、 2DL2 、 2DL3 、 2DL4 、2DL5； KIR3DL1 、 3DL2 、 3DL3； KIR2DS1 、 2DS2 、 2DS3 、 2DS4 、 …

Natural killer (NK) cells are considered crucial for the elimination of emerging tumor cells. Effector NK-cell functions are controlled by interactions of inhibitory and activating killer-cell immunoglobulin-like receptors (KIRs) on NK cells with human leukocyte antigen (HLA) class I ligands on target cells.

To a high extent cytotoxic activity of NK cells is regulated inter alia by signals from killer immunoglobulin-like receptors (KIR). The major histocompatibility complex (MHC) class I molecules are important ligands for KIR receptors.

2022年7月1日 · Interactions of killer cell immunoglobin-like receptors (KIR) with human leukocyte antigens (HLA) class I regulate effector functions of key cytotoxic cells of innate and adaptive immunity. The extreme diversity of this interaction is genetically determined, having evolved in the ever-changing environment of pathogen exposure.

KIR proteins possess characteristic Ig-like domains on their extracellular regions, which in some KIR proteins are involved in HLA class I ligand binding. They also possess transmembrane and cytoplasmic regions which are functionally relevant as they define the type of signal which is transduced to the NK cell.