Recombinant Human LAIR1 (C-mFc)

Source : Human 293 Cells,Leukocyte-associated immunoglobulin-like receptor 1 (LAIR-1) is a type I transmembrane glycoprotein, that belongs to immunoglobulin superfamily and leukocyte-associated inhibitory receptor family. LAIR-1 is expressed on most of the mononuclear cells, including natural killer (NK) cells, B-cells, T-cells, monocytes, and dendritic cells. LAIR-1 plays a role in negatively regulating the cytolytic function of immune cells to prevent lysis of cells recognized as self. Studies predicted that LAIR-1 mediates the inhibitory function based on immunoreceptor tyrosine-based inhibitory motifs (ITIMs) in its cytoplasmic domain. Protein function: Functions as an inhibitory receptor that plays a constitutive negative regulatory role on cytolytic function of natural killer (NK) cells, B-cells and T-cells. Activation by Tyr phosphorylation results in recruitment and activation of the phosphatases PTPN6 and PTPN11. It also reduces the increase of intracellular calcium evoked by B-cell receptor ligation. May also play its inhibitory role independently of SH2-containing phosphatases. Modulates cytokine production in CD4+ T- cells, down-regulating IL2 and IFNG production while inducing secretion of transforming growth factor beta. Down-regulates also IgG and IgE production in B-cells as well as IL8, IL10 and TNF secretion. Inhibits proliferation and induces apoptosis in myeloid leukemia cell lines as well as prevents nuclear translocation of NF-kappa-B p65 subunit/RELA and phosphorylation of I-kappa-B alpha/CHUK in these cells. Inhibits the differentiation of peripheral blood precursors towards dendritic cells. [The UniProt Consortium]