|Western Blot (WB)||1:500-1:1000|
|Tested Species reactivity||Human|
|Host / Isotype||Rabbit / IgG|
|Immunogen||A synthetic phosphopeptide derived from human Chk1 around the phosphorylation site of Ser301 (D-F-SP-P-V)|
|Purification||Antigen affinity chromatography|
|Storage buffer||Dulbecco's PBS, pH 7.4, with 150mM NaCl, 50% glycerol|
|Contains||0.02% sodium azide|
Cell cycle events are regulated by the sequential activation and deactivation of cyclin dependent kinases (Cdks) and by proteolysis of cyclins. Chk1 and Chk2 are involved in these processes as regulators of Cdks. Chk1 and Chk2 both function as essential components in the G2 DNA damage checkpoint by phosphorylating Cdc25C in response to DNA damage. Phosphorylation inhibits Cdc25C activity, thereby blocking mitosis. Cdc25A, Cdc25B and Cdc25C protein tyrosine phosphatases function as mitotic activators by dephosphorylating Cdc2 p34 on regulatory tyrosine residues. It has also been shown that Chk1 can phosphorylate Wee 1 in vitro, providing evidence that the hyperphosphorylated form of Wee 1, seen in cells delayed by Chk1 overexpression, is due to phosphorylation by Chk1. Chk1 is phosphorylated on Serine 345 (S345) in response to UV, IR and hydroxyurea (HU). Chk1 plays an essential role in the mammalian DNA damage checkpoint, embryonic development and tumor suppression.
For Research Use Only. Not for use in diagnostic procedures. Not for resale without express authorization.
Protein Aliases: Cell cycle checkpoint kinase; Checkpoint kinase-1; Checkpoint, S. pombe, homolog of, 1; CHEK1; CHK1; CHK1 checkpoint homolog; Chk1-S; Serine/threonine-protein kinase Chk1
Gene Aliases: CHEK1; CHK1
UniProt ID: (Human) O14757
Entrez Gene ID: (Human) 1111
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