GeneTex
United States (US)

Chk2 (active) recombinant protein

Cat No. GTX65324

Application ELISA, Functional Assay, Apuri, Blocking
Reactivity Human
Species Human
APPLICATION

Application Note

1138 nmol phosphate incorporated into CHKtide per minute per mg protein at 30ºC for 15 minutes using a final concentration of 50 uM ATP (0.83 uCi/assay).

Calculated MW

88.0 kDa. ( Note )
PROPERTIES

Form

Liquid

Buffer

50 mM Tris-HCl, pH 7.5, 150 mM NaCl, 0.25 mM DTT, 0.1 mM EGTA, 0.1 mM EDTA, 0.1 mM PMSF, 25% glycerol

Storage

Store at -80ºC. Product is stable for at least 6-12 months.

Concentration

0.1mg/ml(Please refer to the vial label for the specific concentration.)

Antigen Species

Human

Expression System

Baculovirus (Sf9 insect cells)

Purification


Purity was assessed by SDS-PAGE (≥90%) and by HPLC.

Note

For laboratory use only. Not for any clinical, therapeutic, or diagnostic use in humans or animals. Not for animal or human consumption.
TARGET

Synonyms

CHK2, CHK, CHK2 checkpoint homolog

Background

Chk2 is the mammalian homolog of the Saccharomyces cerevisiae Rad53 and Schizosaccharomyces pombe Cds1 protein kinases required for the DNA damage and replication checkpoints. Chk2 is rapidly phosphorylated and activated in response to replication blocks and DNA damage; the response to DNA damage occurs in an ataxia telangiectasia mutated (ATM)-dependent manner (1). In vitro, Chk2 phosphorylates p53 on Ser-20 and dissociated preformed complexes of p53 with Mdm2, a protein that targets p53 for degradation (2). In vivo, ectopic expression of wild-type Chk2 leads to increased p53 stabilization after DNA damage, whereas expression of a dominant-negative Chk2 mutant abrogated both phosphorylation of p53 on Ser-20 and p53 stabilization. Thus, in response to DNA damage, Chk2 stabilizes the p53 tumor suppressor protein leading to cell cycle arrest in G1. Chk2 is directly phosphorylated by ATM in response to ionizing radiation (3). The phosphorylation occurs in the Ser-Gln/Thr-Gln (SQ/TQ) cluster domain (SCD) on Chk2, which contains seven SQ/TQ motifs, and Thr68 is the major in vitro phosphorylation site by ATM.

Research Area

Package List Price ($)
$ 349