CDK9/CyclinK Kinase Enzyme System

The Kinase Enzyme Systems include a recombinant kinase enzyme, a substrate appropriate for the enzyme, a reaction buffer and supplemental reagents as needed. The CHK2 Kinase Enzyme System contains:

• CHK2, 10μg (Human, recombinant full-length). MW: ~88kDa.
• Chktide (KKKVSRSGLYRSPSMPENLNRPR) Substrate; derived from human CDC25C protein isoform A (amino acids 205225).
• Reaction Buffer, DTT.

Recombinant full-length human CHK2 was expressed by baculovirus in Sf9 insect cells using an N-terminal GST tag. 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. 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.

CHK2 NCBI Database Entry.

The CHK2 Kinase Enzyme System can be purchased with or without the ADP-Glo Kinase Assay reagents. Used together, the ADP-Glo Kinase Assay + Kinase Enzyme Systems provide a convenient method for profiling the effect of lead compounds on kinase activity. Assay advantages include broad dynamic range, ease of use and high sensitivity. Kinase Enzyme Systems are manufactured by SignalChem. Bulk quantities available upon request.

Use with ADP-Glo Kinase Assay

The ADP-Glo Kinase Assay is a luminescent kinase assay that measures ADP formed from a kinase reaction; ADP is converted into ATP, which is a substrate in a reaction catalyzed by Ultra-Glo Luciferase that produces light. The luminescent signal positively correlates with ADP amount and kinase activity. The assay is well suited for measuring the effects of chemical compounds on the activity of a broad range of purified kinases, making it ideal for both primary screening as well as kinase selectivity profiling. The ADP-Glo Kinase Assay can be used to monitor the activity of virtually any ADP-generating enzyme (e.g., kinase or ATPase) using up to 1mM ATP.

See all Kinase Enzyme Systems available from Promega.