- Catalog number
- PB9102
- Size / count
- 100 µg/Vial
- Dry ice
- No
- Hazardous
- No
- Discontinued
- No
- Background
- CSK also known as C-Src kinase, is a non-receptor protein tyrosine kinase protein that in humans is encoded by the CSK gene. It is mapped to 15q24.1. CSK suppresses activity of the Src family of protein kinases by phosphorylation of Src family members at a conserved C-terminal site in Src. Csk's control of the Src family activity is widely thought to be central to regulation of the immune response. CSK can downregulate tyrosine kinase activity of the SRC oncoprotein through tyrosine phosphorylation of the SRC carboxy terminus. Since cell transformation by SRC oncoproteins is caused by various mechanisms that interfere with this phosphorylation, the CSK gene might function as an antioncogene.
- Synonyms
- Tyrosine-protein kinase CSK;2.7.10.2; C-Src kinase; Protein-tyrosine kinase CYL; CSK
- Gene Name
- CSK
- Gene ID
- 1445
- UniProt
- P41240
- Host
- Rabbit
- Reactivity
- Human, Mouse, Rat
- Cross Reactivity
- No cross-reactivity with other proteins
- Immunogen
- E.coli-derived human CSK recombinant protein (Position: S2-G204) . Human CSK shares 99% amino acid (aa) sequence identity with both mouse and rat CSK.
- Clonality
- Polyclonal
- Tissue Specificity
- Expressed in lung and macrophages. .
- Applications
- IHC, WB
- Field of Research
- Protein Phosphorylation, Signal Transduction, Tyrosine Kinases
- Purification
- Immunogen affinity purified.
- Concentration
- Adding 0.2 ml of distilled water will yield a concentration of 500 μg/ml.
- Form
- Lyophilized
- Reconstitution
- Add 0.2ml of distilled water will yield a concentration of 500ug/ml.
- 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. .
- References & Citations
- 1. Bergman M, Mustelin T, Oetken C, Partanen J, Flint NA, Amrein KE, Autero M, Burn P, Alitalo K (August 1992) . The human p50csk tyrosine kinase phosphorylates p56lck at Tyr-505 and down regulates its catalytic activity. 2. Sun G, Budde RJ (September 1997) . Expression, purification, and initial characterization of human Yes protein tyrosine kinase from a bacterial expression system. Arch. Biochem. Biophys. 345 (1) : 135–42. 3. Nada S, Okada M, MacAuley A, Cooper JA, Nakagawa H (May 1991) . Cloning of a complementary DNA for a protein-tyrosine kinase that specifically phosphorylates a negative regulatory site of p60c-src. Nature 351 (6321) : 69–72.
- Storage Conditions
- Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.
- Calculated Molecular Weight
- 50704 MW
- Observed Molecular Weight
- 51 kDa
- Specificity
- No cross reactivity with other proteins.
- Gene Name Synonym
- Tyrosine-protein kinase CSK
- Subcellular Location
- Cytoplasm . Cell membrane . Mainly cytoplasmic, also present in lipid rafts. .
- Sequence Similarities
- Belongs to the protein kinase superfamily. Tyr protein kinase family. CSK subfamily.
- Protein Name
- Tyrosine-protein kinase CSK
- Isotype
- Rabbit IgG
- Contents
- Each vial contains 5mg BSA, 0.9mg NaCl, 0.2mg Na2HPO4, 0.05mg NaN3.