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Related Experiment Videos

HtrA--a renaissance protein.

Catherine L Day1, Mark G Hinds

  • 1Department of Biochemistry, University of Otago, 710 Cumberland Street, Dunedin, New Zealand.

Structure (London, England : 1993)
|June 12, 2002
PubMed
Summary

The HtrA/DegP protein family, known as proteases, also function as bacterial chaperones and regulate apoptosis in mammals. New structural data reveals how these proteins achieve their diverse roles.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Structural Biology

Background:

  • The HtrA/DegP protein family is recognized for its protease activity.
  • These proteins also exhibit chaperone functions in bacteria.
  • Mammalian HtrA2 has been implicated in regulating apoptosis.

Purpose of the Study:

  • To investigate the structural basis for the diverse functions of the HtrA/DegP protein family.
  • To understand the evolutionary origin of the HtrA/DegP protein family's multiple roles.

Main Methods:

  • X-ray crystallography was used to determine the structures of mammalian HtrA2 and E. coli DegP.
  • Comparative structural analysis was performed.

Main Results:

  • The study presents novel structures of mammalian HtrA2 and E. coli DegP.
  • These structures offer insights into the structural mechanisms underlying the dual protease and chaperone activities.
  • Structural comparisons shed light on the evolution of HtrA/DegP functions.

Conclusions:

  • The structural data provides a foundation for understanding the functional plasticity of the HtrA/DegP family.
  • This research elucidates the molecular basis for HtrA2's role in apoptosis regulation and DegP's functions in E. coli.
  • The findings contribute to our understanding of protein evolution and function diversification.

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