Rabbit cKit Polyclonal Antibody | anti-cKit antibody
cKit Antibody BIOTIN-Conjugated
Immunoprecipitation: 1:150
Western Blot: 1:500
Isoform 2 : Cell membrane; Single-pass type I membrane protein
Isoform 3 : Cytoplasm
Tyrosine-protein kinase that acts as cell-surface receptor for the cytokine KITLG/SCF and plays an essential role in the regulation of cell survival and proliferation, hematopoiesis, stem cell maintenance, gametogenesis, mast cell development, migration and function, and in melanogenesis. In response to KITLG/SCF binding, KIT can activate several signaling pathways. Phosphorylates PIK3R1, PLCG1, SH2B2/APS and CBL. Activates the AKT1 signaling pathway by phosphorylation of PIK3R1, the regulatory subunit of phosphatidylinositol 3-kinase. Activated KIT also transmits signals via GRB2 and activation of RAS, RAF1 and the MAP kinases MAPK1/ERK2 and/or MAPK3/ERK1. Promotes activation of STAT family members STAT1, STAT3, STAT5A and STAT5B. Activation of PLCG1 leads to the production of the cellular signaling molecules diacylglycerol and inositol 1, 4, 5-trisphosphate. KIT signaling is modulated by protein phosphatases, and by rapid internalization and degradation of the receptor. Activated KIT promotes phosphorylation of the protein phosphatases PTPN6/SHP-1 and PTPRU, and of the transcription factors STAT1, STAT3, STAT5A and STAT5B. Promotes phosphorylation of PIK3R1, CBL, CRK (isoform Crk-II), LYN, MAPK1/ERK2 and/or MAPK3/ERK1, PLCG1, SRC and SHC1. Present in an inactive conformation in the absence of bound ligand. KITLG/SCF binding leads to dimerization and activation by autophosphorylation on tyrosine residues. Activity is down-regulated by PRKCA-mediated phosphorylation on serine residues. Inhibited by imatinib/STI-571 (Gleevec) and sunitinib; these compounds maintain the kinase in an inactive conformation.
NCBI and Uniprot Product Information
NCBI Description
This gene encodes the human homolog of the proto-oncogene c-kit. C-kit was first identified as the cellular homolog of the feline sarcoma viral oncogene v-kit. This protein is a type 3 transmembrane receptor for MGF (mast cell growth factor, also known as stem cell factor). Mutations in this gene are associated with gastrointestinal stromal tumors, mast cell disease, acute myelogenous lukemia, and piebaldism. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
Uniprot Description
Kit: a receptor tyrosine kinase and a member of the subfamily that includes PDGF, CSF-1 and FLT-3/flk-2 receptors. Receptor for stem cell factor. Plays a critical role in hematopoietic stem cell, mast cell, melanocyte and germ cell development. Ligand binding induces autophosphorylation, dimerization and activation, leading to the recruitment and phosphorylation of downstream SH2-containing signaling components including PLC-gamma, PI3 kinase p85, SHP2 and CrkL, linking c-Kit to various cell signaling pathways. Molecular lesions that impair the kinase activity of c-Kit are associated with a variety of developmental disorders, while mutations that constitutively activate c-Kit can lead to hyperplasia and tumorigenesis. Activating mutations cause >90% of gastrointestinal stromal tumors (GIST); successfully treated with inhibitors Gleevec (imatinib, Glivec) and Sutent (Sutinib, SU11248). Activating mutations also induce mastocytosis. Autocrine/paracrine stimulation may drive some lung and other tumors. Loss of expression associated with melanoma progression. Familial loss of function mutations cause piebaldism, with defects in hair and skin pigmentation due to lack of melanocytes.
Protein type: Kinase, protein; Oncoprotein; Protein kinase, tyrosine (receptor); Membrane protein, integral; EC 2.7.10.1; Protein kinase, TK; TK group; PDGFR family
Chromosomal Location of Human Ortholog: 4q12
Cellular Component: acrosome; external side of plasma membrane; extracellular space; integral to membrane; intercellular junction; internal side of plasma membrane; mast cell granule; plasma membrane
Molecular Function: ATP binding; cytokine binding; metal ion binding; phosphatidylinositol-4,5-bisphosphate 3-kinase activity; protease binding; protein binding; protein homodimerization activity; protein-tyrosine kinase activity; Ras guanyl-nucleotide exchange factor activity; receptor signaling protein tyrosine kinase activity; stem cell factor receptor activity; transmembrane receptor protein tyrosine kinase activity
Biological Process: actin cytoskeleton reorganization; activation of MAPK activity; cytokine and chemokine mediated signaling pathway; dendritic cell cytokine production; detection of mechanical stimulus involved in sensory perception of sound; embryonic hemopoiesis; epithelial cell proliferation; erythrocyte differentiation; germ cell migration; germ cell programmed cell death; glycosphingolipid metabolic process; gut development; hemopoiesis; immature B cell differentiation; inflammatory response; lamellipodium biogenesis; lymphoid progenitor cell differentiation; male gonad development; MAPKKK cascade; mast cell chemotaxis; mast cell cytokine production; mast cell degranulation; melanocyte differentiation; myeloid progenitor cell differentiation; negative regulation of programmed cell death; ovarian follicle development; peptidyl-tyrosine phosphorylation; phosphoinositide phosphorylation; phosphoinositide-mediated signaling; pigmentation; positive regulation of cell migration; positive regulation of cell proliferation; positive regulation of GTPase activity; positive regulation of JAK-STAT cascade; positive regulation of long-term neuronal synaptic plasticity; positive regulation of MAPKKK cascade; positive regulation of Notch signaling pathway; positive regulation of phosphoinositide 3-kinase activity; positive regulation of phosphoinositide 3-kinase cascade; positive regulation of pseudopodium formation; positive regulation of transcription factor activity; positive regulation of tyrosine phosphorylation of Stat1 protein; positive regulation of tyrosine phosphorylation of Stat3 protein; positive regulation of tyrosine phosphorylation of Stat5 protein; protein amino acid autophosphorylation; regulation of cell proliferation; regulation of cell shape; regulation of phosphoinositide 3-kinase cascade; regulation of pigmentation during development; signal transduction; somatic stem cell division; somatic stem cell maintenance; spermatid development; spermatogenesis; stem cell differentiation; stem cell maintenance; T cell differentiation; visual learning
Disease: Gastrointestinal Stromal Tumor; Mast Cell Disease; Piebald Trait; Testicular Germ Cell Tumor
