BTK
Entrez ID: 695
Full name: Bruton tyrosine kinase
External links: HGNC UniprotKB Ensembl RefSeq COSMIC
Family: TK: Tec
Chromosomal location: Xq22.1
Substructure location: Gatekeeper: 474 A-loop: 538...562 G-loop: 409...416 αC-helix: 439...450
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BTK
Non-receptor tyrosine kinase indispensable for B lymphocyte development, differentiation and signaling. Binding of antigen to the B-cell antigen receptor (BCR) triggers signaling that ultimately leads to B-cell activation. After BCR engagement and activation at the plasma membrane, phosphorylates PL...
Non-receptor tyrosine kinase indispensable for B lymphocyte development, differentiation and signaling. Binding of antigen to the B-cell antigen receptor (BCR) triggers signaling that ultimately leads to B-cell activation. After BCR engagement and activation at the plasma membrane, phosphorylates PLCG2 at several sites, igniting the downstream signaling pathway through calcium mobilization, followed by activation of the protein kinase C (PKC) family members. PLCG2 phosphorylation is performed in close cooperation with the adapter protein B-cell linker protein BLNK. BTK acts as a platform to bring together a diverse array of signaling proteins and is implicated in cytokine receptor signaling pathways. Plays an important role in the function of immune cells of innate as well as adaptive immunity, as a component of the Toll-like receptors (TLR) pathway. The TLR pathway acts as a primary surveillance system for the detection of pathogens and are crucial to the activation of host defense. Especially, is a critical molecule in regulating TLR9 activation in splenic B-cells. Within the TLR pathway, induces tyrosine phosphorylation of TIRAP which leads to TIRAP degradation. BTK plays also a critical role in transcription regulation. Induces the activity of NF-kappa-B, which is involved in regulating the expression of hundreds of genes. BTK is involved on the signaling pathway linking TLR8 and TLR9 to NF-kappa-B. Transiently phosphorylates transcription factor GTF2I on tyrosine residues in response to BCR. GTF2I then translocates to the nucleus to bind regulatory enhancer elements to modulate gene expression. ARID3A and NFAT are other transcriptional target of BTK. BTK is required for the formation of functional ARID3A DNA-binding complexes. There is however no evidence that BTK itself binds directly to DNA. BTK has a dual role in the regulation of apoptosis.
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GO - Biological processes (BP):
adaptive immune response, apoptotic signaling pathway, B cell activation, B cell affinity maturation, B cell receptor signaling pathway, calcium-mediated signaling, cell maturation, cellular response to interleukin-7, cellular response to molecule of fungal origin, cellular response to reactive oxyg...
adaptive immune response, apoptotic signaling pathway, B cell activation, B cell affinity maturation, B cell receptor signaling pathway, calcium-mediated signaling, cell maturation, cellular response to interleukin-7, cellular response to molecule of fungal origin, cellular response to reactive oxygen species, Fc-epsilon receptor signaling pathway, G protein-coupled receptor signaling pathway, histamine secretion by mast cell, I-kappaB kinase/NF-kappaB signaling, innate immune response, intracellular signal transduction, mesoderm development, MyD88-dependent toll-like receptor signaling pathway, negative regulation of B cell proliferation, negative regulation of cytokine production, peptidyl-tyrosine phosphorylation, positive regulation of B cell differentiation, positive regulation of NF-kappaB transcription factor activity, positive regulation of type I hypersensitivity, positive regulation of type III hypersensitivity, protein autophosphorylation, protein phosphorylation, regulation of B cell apoptotic process, regulation of B cell cytokine production
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GO - Molecular function (MF):
ATP binding, identical protein binding, metal ion binding, non-membrane spanning protein tyrosine kinase activity, phosphatidylinositol-3,4,5-trisphosphate binding, protein tyrosine kinase activity...
ATP binding, identical protein binding, metal ion binding, non-membrane spanning protein tyrosine kinase activity, phosphatidylinositol-3,4,5-trisphosphate binding, protein tyrosine kinase activity
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GO - Cellular component (CC):
cytosol, mast cell granule, nucleus, plasma membrane, cytoplasm, cytoplasmic vesicle, membrane raft, perinuclear region of cytoplasm...
cytosol, mast cell granule, nucleus, plasma membrane, cytoplasm, cytoplasmic vesicle, membrane raft, perinuclear region of cytoplasm
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Bruton tyrosine kinase
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Kaplan plot for BTK in
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*NOTE: the Kaplan plots were collected from OncoLnc