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Related Experiment Videos

Chaperone function of Hsp90-associated proteins

S Bose1, T Weikl, H Bügl

  • 1Institut für Biophysik und Physikalische Biochemie, Universität Regensburg, 93040 Regensburg, Germany. johannes.buchner@biologie.uni-regensburg.de

Science (New York, N.Y.)
|December 6, 1996
PubMed
Summary
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The Hsp90 chaperone complex, containing proteins like FKBP52 and p23, acts as a distinct molecular chaperone. This suggests a larger "super-chaperone" system exists within eukaryotic cells for protein regulation.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Heat shock protein 90 (Hsp90) is crucial for regulating eukaryotic cell signaling pathways and protein folding.
  • Hsp90 functions within a complex involving partner proteins, including prolyl isomerases.

Purpose of the Study:

  • To investigate the properties of major Hsp90 complex components.
  • To understand the chaperone activity of FKBP52 and p23 within the Hsp90 complex.

Main Methods:

  • In vitro protein folding assays were utilized.
  • The functional roles of FKBP52 and p23 as molecular chaperones were assessed.

Main Results:

  • FKBP52 and p23 were identified as distinct molecular chaperones.

Related Experiment Videos

  • These components contribute mechanistically different functions within the Hsp90 complex.

    • Conclusions:

    • The findings support the existence of a novel
    • super-chaperone
    • complex in the eukaryotic cytosol.
    • Hsp90 and its partners form a sophisticated machinery for protein homeostasis.