Monoclinic complex structure of human protein kinase CK2 catalytic subunit (isoform CK2alpha') with the inhibitor 4'-carboxy-6,8-chloro-flavonol (FLC21)
Structural Hypervariability of the Two Human Protein Kinase CK2 Catalytic Subunit Paralogs Revealed by Complex Structures with a Flavonol- and a Thieno[2,3-d]pyrimidine-Based Inhibitor.
Protein kinase CK2 is associated with a number of human diseases, among them cancer, and is therefore a target for inhibitor development in industry and academia. Six crystal structures of either CK2α, the catalytic subunit of human protein kinase CK2, or its paralog CK2α' in complex with two ATP-competitive inhibitors-based on either a flavonol or a thieno[2,3-d]pyrimidine framework-are presented ...
Protein kinase CK2 is associated with a number of human diseases, among them cancer, and is therefore a target for inhibitor development in industry and academia. Six crystal structures of either CK2α, the catalytic subunit of human protein kinase CK2, or its paralog CK2α' in complex with two ATP-competitive inhibitors-based on either a flavonol or a thieno[2,3-d]pyrimidine framework-are presented. The structures show examples for extreme structural deformations of the ATP-binding loop and its neighbourhood and of the hinge/helix αD region, i.e., of two zones of the broader ATP site environment. Thus, they supplement our picture of the conformational space available for CK2α and CK2α'. Further, they document the potential of synthetic ligands to trap unusual conformations of the enzymes and allow to envision a new generation of inhibitors that stabilize such conformations.
Related Citations:
A Note of Caution on the Role of Halogen Bonds for Protein Kinase/Inhibitor Recognition Suggested by High- And Low-Salt CK2alpha Complex Structures. Guerra, B., Bischoff, N., Bdzhola, V.G., Yarmoluk, S.M., Issinger, O.G., Golub, A.G., Niefind, K. (2015) ACS Chem Biol 10: 1654
Synthesis and biological evaluation of substituted (thieno[2,3-d]pyrimidin-4-ylthio)carboxylic acids as inhibitors of human protein kinase CK2. Golub, A.G., Bdzhola, V.G., Briukhovetska, N.V., Balanda, A.O., Kukharenko, O.P., Kotey, I.M., Ostrynska, O.V., Yarmoluk, S.M. (2011) Eur J Med Chem 46: 870
Structure-based discovery of novel flavonol inhibitors of human protein kinase CK2. Golub, A.G., Bdzhola, V.G., Kyshenia, Y.V., Sapelkin, V.M., Prykhod'ko, A.O., Kukharenko, O.P., Ostrynska, O.V., Yarmoluk, S.M. (2011) Mol Cell Biochem 356: 107
Organizational Affiliation:
Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, 150 Zabolotnogo Street, 03680 Kyiv, Ukraine. yarmolyuksm@gmail.com.
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