Acts as a negative regulator of entry into mitosis (G2 to M transition) by protecting the nucleus from cytoplasmically activated cyclin B1-complexed CDK1 before the onset of mitosis by mediating phosphorylation of CDK1 on ′Tyr-15′. Specifically phosphorylates and inactivates cyclin B1-complexed CDK1 reaching a maximum during G2 phase and a minimum as cells enter M phase. Phosphorylation of cyclin B1-CDK1 occurs exclusively on ′Tyr-15′ and phosphorylation of monomeric CDK1 does not occur. Its activity increases during S and G2 phases and decreases at M phase when it is hyperphosphorylated. A correlated decrease in protein level occurs at M/G1 phase, probably due to its degradation.
Product Source: N-terminal GST-tagged and C-terminal 6His tagged, recombinant, human Wee1 amino acids 214-end expressed by baculovirus in Sf21 insect cells.
Biochem/physiol Actions
Protein Target: WEE1
Packaging
Also available in 250μg size as catalog # 14-925M and in bulk as catalog # 14-925-K.
Quality
Routinely evaluated by phosphorylation of peptide LSNLYHQGKFLQTFCGSPLYRRR.
Other Notes
For Specific Activity data, refer to the Certificate of Analysis for individual lots of this enzyme.
Legal Information
UPSTATE is a registered trademark of Merck KGaA, Darmstadt, Germany
Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.
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