a tyrosine kinase of the Csk family that phosphorylates and inhibits Src family kinases. Specifically phosphorylates Y504 on LCK, which acts as a negative regulatory site. Csk and the phospho-tyrosine phosphatase CD45 reciprocally regulate phosphorylation of the inhibitory tyrosine of the Src family kinases Lck and Fyn during T-cell receptor mediated signaling during thymic development. Note: This description may include information from UniProtKB.
Protein type: EC 188.8.131.52; Protein kinase, tyrosine (non-receptor); Kinase, protein; Protein kinase, TK; TK group; Csk family
Molecular Function: protein C-terminus binding; identical protein binding; protein binding; protein-tyrosine kinase activity; non-membrane spanning protein tyrosine kinase activity; protein phosphatase binding; ATP binding
Biological Process: epidermal growth factor receptor signaling pathway; platelet activation; negative regulation of kinase activity; negative regulation of phagocytosis; peptidyl-tyrosine phosphorylation; negative regulation of Golgi to plasma membrane protein transport; protein amino acid autophosphorylation; T cell receptor signaling pathway; protein amino acid phosphorylation; positive regulation of MAP kinase activity; negative regulation of cell proliferation; T cell costimulation; negative regulation of interleukin-6 production; oligodendrocyte differentiation; brain development; blood coagulation; negative regulation of bone resorption
SS: The number of records in which this modification site was determined using site-specific methods. SS methods include amino acid sequencing, site-directed mutagenesis, modification site-specific antibodies, specific MS strategies, etc.