All members of the Src gene family of tyrosine kinases are characterized by a carboxy terminal domain tyrosine which is highly phosphorylated in the inactive form of the enzyme and phosphorylated to a much lesser extent when the enzyme is active. In the case of Src p60, Y527 is this tyrosine; however, a mutant form of c-Src in which Y527 is replaced by phenylalanine is transforming and displays 5- to 10-fold elevated kinase activity compared to its normal counterpart. Csk has been identified as a Src-related tyrosine kinase having both SH2 and SH3 domains and a catalytic domain but lacking sequences amino terminal to the SH3 domain as well as carboxy terminal regulatory sequences. Csk phosphorylates Src on Y527 and also downregulates Lyn, Fyn and Lck by tyrosine phosphorylation of carboxy terminal regulatory sites.
产品应用
应用
已检合格种属
预测种属
推荐稀释比例
WB
Human, Mouse
Rat
1:500-2000
交叉反应
交叉反应: Human, Mouse (predicted: Rat)
相关产品
暂无相关产品
靶标
基因名
CSK
蛋白名
Tyrosine-protein kinase CSK
亚基
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.
亚细胞定位
Cytoplasm. Cell membrane. Mainly cytoplasmic, also present in lipid rafts.
组织特异性
Expressed in lung and macrophages.
翻译后修饰
Autophosphorylation of Tyr-304 occurs only at abnormally high CSK concentrations in vitro.
相似性
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.
功能
Specifically phosphorylates 'Tyr-504' on LCK, which acts as a negative regulatory site. Can also act on the LYN and FYN kinases.