Structural highlights
Function[PMYT1_HUMAN] Acts as a negative regulator of entry into mitosis (G2 to M transition) by phosphorylation of the CDK1 kinase specifically when CDK1 is complexed to cyclins. Mediates phosphorylation of CDK1 predominantly on 'Thr-14'. Also involved in Golgi fragmentation. May be involved in phosphorylation of CDK1 on 'Tyr-15' to a lesser degree, however tyrosine kinase activity is unclear and may be indirect. May be a downstream target of Notch signaling pathway during eye development.[1] [2] Publication Abstract from PubMedMembers of the Wee family of kinases negatively regulate the cell cycle via phosphorylation of CDK1 and are considered potential drug targets. Herein, we investigated the structure-function relationship of human Wee1, Wee2 and Myt1 (PKMYT1). Purified recombinant full-length proteins and kinase domain constructs differed substantially in phosphorylation states and catalytic competency suggesting complex mechanisms of activation. A series of crystal structures revealed unique features that distinguish Wee1 and Wee2 from Myt1 and establish the structural basis of differential inhibition by the widely used Wee1 inhibitor MK-1775. Kinome profiling and cellular studies demonstrate that, in addition to Wee1 and Wee2, MK-1775 is an equally potent inhibitor of the polo-like kinase PLK1. Several previously unrecognized inhibitors of Wee kinases were discovered and characterized. Combined, the data provide a comprehensive view on the catalytic and structural properties of Wee kinases and a framework for the rational design of novel inhibitors thereof. Structural basis of Wee kinases functionality and inactivation by diverse small molecule inhibitors.,Zhu JY, Cuellar RAD, Berndt N, Lee HE, Olesen SH, Martin MP, Jensen JT, Georg GI, Schonbrunn E J Med Chem. 2017 Aug 9. doi: 10.1021/acs.jmedchem.7b00996. PMID:28792760[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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This page was last modified 10:59, 24 August 2017.