Crystal structure of cyclin-dependent kinase 2.

De Bondt, H L; Rosenblatt, J; Jancarik, J; Jones, H D; Morgan, D O; Kim, S H · Nature · 1993

basic_science · Level V

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Abstract

Cyclin-dependent kinase 2 (CDK2) is a member of a highly conserved family of protein kinases that regulate the eukaryotic cell cycle. The crystal structures of the human CDK2 apoenzyme and its Mg2+ ATP complex have been determined to 2.4 A resolution. The structure is bi-lobate, like that of the cyclic AMP-dependent protein kinase, but contains a unique helix-loop segment that interferes with ATP and protein substrate binding and probably plays a key part in the regulation of all cyclin-dependent kinases.

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