FUNCTION: Non-receptor tyrosine kinase involved in B-lymphocyte development, differentiation and signaling (By similarity). B-cell receptor (BCR) signaling requires a tight regulation of several protein tyrosine kinases and phosphatases, and associated coreceptors (By similarity). Binding of antigen...
FUNCTION: Non-receptor tyrosine kinase involved in B-lymphocyte development, differentiation and signaling (By similarity). B-cell receptor (BCR) signaling requires a tight regulation of several protein tyrosine kinases and phosphatases, and associated coreceptors (By similarity). Binding of antigen to the B-cell antigen receptor (BCR) triggers signaling that ultimately leads to B-cell activation (By similarity). Signaling through BLK plays an important role in transmitting signals through surface immunoglobulins and supports the pro-B to pre-B transition, as well as the signaling for growth arrest and apoptosis downstream of B-cell receptor (By similarity). Specifically binds and phosphorylates CD79A at 'Tyr-188'and 'Tyr-199', as well as CD79B at 'Tyr-196' and 'Tyr-207' (By similarity). Phosphorylates also the immunoglobulin G receptors FCGR2A, FCGR2B and FCGR2C (PubMed:8756631). With FYN and LYN, plays an essential role in pre-B-cell receptor (pre-BCR)-mediated NF-kappa-B activation (By similarity). Contributes also to BTK activation by indirectly stimulating BTK intramolecular autophosphorylation (By similarity). In pancreatic islets, acts as a modulator of beta-cells function through the up-regulation of PDX1 and NKX6-1 and consequent stimulation of insulin secretion in response to glucose (PubMed:19667185). Phosphorylates CGAS, promoting retention of CGAS in the cytosol (PubMed:30356214). {ECO:0000250|UniProtKB:P16277, ECO:0000269|PubMed:19667185, ECO:0000269|PubMed:30356214, ECO:0000269|PubMed:8756631}.
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GO - Biological processes (BP):
B cell receptor signaling pathway [GO:0050853]; cell differentiation [GO:0030154]; cellular response to DNA damage stimulus [GO:0006974]; dendritic cell differentiation [GO:0097028]; Fc receptor mediated stimulatory signaling pathway [GO:0002431]; innate immune response [GO:0045087]; intracellular s...
B cell receptor signaling pathway [GO:0050853]; cell differentiation [GO:0030154]; cellular response to DNA damage stimulus [GO:0006974]; dendritic cell differentiation [GO:0097028]; Fc receptor mediated stimulatory signaling pathway [GO:0002431]; innate immune response [GO:0045087]; intracellular signal transduction [GO:0035556]; negative regulation of B cell proliferation [GO:0030889]; negative regulation of mast cell proliferation [GO:0070667]; neuron projection development [GO:0031175]; peptidyl-tyrosine phosphorylation [GO:0018108]; platelet degranulation [GO:0002576]; positive regulation of dendritic cell apoptotic process [GO:2000670]; positive regulation of insulin secretion [GO:0032024]; positive regulation of protein binding [GO:0032092]; regulation of B cell apoptotic process [GO:0002902]; regulation of B cell receptor signaling pathway [GO:0050855]; regulation of mast cell degranulation [GO:0043304]; regulation of platelet aggregation [GO:0090330]; tolerance induction to self antigen [GO:0002513]; transmembrane receptor protein tyrosine kinase signaling pathway [GO:0007169]
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GO - Molecular function (MF):
ATP binding [GO:0005524]; non-membrane spanning protein tyrosine kinase activity [GO:0004715]; protein serine/threonine/tyrosine kinase activity [GO:0004712]; protein tyrosine kinase activity [GO:0004713]; signaling receptor binding [GO:0005102]...
ATP binding [GO:0005524]; non-membrane spanning protein tyrosine kinase activity [GO:0004715]; protein serine/threonine/tyrosine kinase activity [GO:0004712]; protein tyrosine kinase activity [GO:0004713]; signaling receptor binding [GO:0005102]
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GO - Cellular component (CC):
cytosol [GO:0005829]; extrinsic component of cytoplasmic side of plasma membrane [GO:0031234]...
cytosol [GO:0005829]; extrinsic component of cytoplasmic side of plasma membrane [GO:0031234]
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