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Domain movements in protein kinases

S Cox1, E Radzio-Andzelm, S S Taylor

  • 1Department of Chemistry and Biochemistry, University of California at San Diego, La Jolla 92093-0654.

Current Opinion in Structural Biology
|December 1, 1994
PubMed
Summary

Structural studies reveal two conformations of cAMP-dependent protein kinase. This research defines mobile domains within the conserved catalytic core of protein kinases.

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Area of Science:

  • Biochemistry
  • Structural Biology
  • Molecular Biology

Background:

  • cAMP-dependent protein kinase (PKA) is crucial for cellular signaling.
  • Understanding PKA structure is key to deciphering its regulatory mechanisms.

Purpose of the Study:

  • To elucidate the structural dynamics of the catalytic subunit of PKA.
  • To identify mobile regions within the conserved catalytic core of protein kinases.

Main Methods:

  • X-ray crystallography
  • Solution-state structural studies
  • Comparative analysis of protein kinase structures

Main Results:

  • Two distinct conformations of the PKA catalytic subunit were identified.
  • Analysis revealed mobile domains and subdomains within the conserved catalytic core.
  • Recent crystal structures of other protein kinases provide complementary data.

Conclusions:

  • The catalytic core of protein kinases possesses inherent flexibility.
  • Defined mobile regions are critical for kinase function and regulation.
  • This structural insight aids in the design of targeted kinase inhibitors.

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