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Subunit: Homodimer (via SH3-domain). Interacts with PTPN8 (By similarity). Interacts with phosphorylated SIT1, PAG1, LIME1 and TGFB1I1; these interactions serve to recruit CSK to the membrane where it can phosphorylate and inhibit Src-family kinases. Interacts with SRCIN1. Interacts with RHOH. Interacts (via SH2 domain) with SCIMP 6 PDB 3D structures from [IMAGE] and Proteopedia [IMAGE] for CSK: 1BYG (3D) [IMAGE] 1CSK (3D) [IMAGE] 3D7T (3D) [IMAGE] 3D7U (3D) [IMAGE] 3EAC (3D) [IMAGE] 3EAZ (3D) [IMAGE]
Tissue specificity: Expressed in lung and macrophages [IMAGE] Custom PCR Arrays for CSK Primer Products: [IMAGE] OriGene qPCR primer pairs and template standards for CSK OriGene qSTAR qPCR primer pairs in human, mouse for CSK [IMAGE] Pre-validated RT2 qPCR Primer Assay in hu
Function: Non-receptor tyrosine-protein kinase that plays an important role in the regulation of cell growth, differentiation, migration and immune response. Phosphorylates tyrosine residues located in the C-terminal tails of Src-family kinases (SFKs) including LCK, SRC, HCK, FYN, LYN or YES1. Upon tail phosphorylation, Src-family members engage in intramolecular interactions between the phosphotyrosine tail and the SH2 domain that result in an inactive conformation. To inhibit SFKs, CSK is recruited to the plasma membrane via binding to transmembrane proteins or adapter proteins located near the plasma membrane. Suppresses signaling by various surface receptors, including T-cell receptor (TCR) and B-cell receptor (BCR) by phosphorylating and maintaining inactive several positive effectors such as FYN or LCK Non-receptor tyrosine-protein kinase that plays an important role in the regulation of cell growth, differentiation, migration and immune response. Phosphorylates tyrosine residues located in the C-terminal tails of Src-family kinases (SFKs) including LCK, SRC, HCK, FYN, LYN or YES1. Upon tail phosphorylation, Src-family members engage in intramolecular interactions between the phosphotyrosine tail and the SH2 domain that result in an inactive conformation. To inhibit SFKs, CSK is recruited to the plasma membrane via binding to transmembrane proteins or adapter proteins located near the plasma membrane. Suppresses signaling by various surface receptors, including T-cell receptor (TCR) and B-cell receptor (BCR) by phosphorylating and maintaining inactive several positive effectors such as FYN or LCK
Catalytic activity: ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate
Similarity: Belongs to the protein kinase superfamily. Tyr protein kinase family. CSK subfamily Contains 1 protein kinase domain Contains 1 SH2 domain Contains 1 SH3 domain [IMAGE]
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