Related Experiment Videos
Crystal structure of cyclin-dependent kinase 2
H L De Bondt1, J Rosenblatt, J Jancarik
1Department of Chemistry, University of California, Berkeley 94720.
Nature
|June 17, 1993
Summary
Researchers determined the crystal structures of human cyclin-dependent kinase 2 (CDK2) apoenzyme and its Mg2+ ATP complex. A unique helix-loop segment was identified, likely regulating CDK2 and other cyclin-dependent kinases.
Area of Science:
- Molecular Biology
- Structural Biology
- Biochemistry
Background:
- Cyclin-dependent kinase 2 (CDK2) is crucial for eukaryotic cell cycle regulation.
- CDK2 belongs to a conserved family of protein kinases.
Purpose of the Study:
- To elucidate the structural basis of CDK2 function.
- To understand the regulatory mechanisms of CDK2.
Main Methods:
- X-ray crystallography was used to determine the structure of human CDK2.
- Structures were resolved to 2.4 A resolution for both apoenzyme and Mg2+ ATP complex.
Main Results:
- The human CDK2 structure is bi-lobate, similar to cyclic AMP-dependent protein kinase.
- A novel helix-loop segment was identified within the CDK2 structure.
- This unique segment appears to hinder ATP and protein substrate binding.
Conclusions:
- The identified helix-loop segment is likely a key regulatory element in CDK2.
- This structural feature may play a significant role in the regulation of all cyclin-dependent kinases.