Nucleotide-Dependent Dimer Association and Dissociation of the Chaperone Hsp90

Katarzyna M. Tych, Markus Jahn, Florian Gegenfurtner, Vera K. Hechtl, Johannes Buchner, Thorsten Hugel, Matthias Rief*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

3 Citations (Scopus)

Abstract

Hsp90 is an essential molecular chaperone, which has to be in a dimeric form for its correct function. While the affinity of the dimer has previously been measured, little is known about how it associates and dissociates and the factors that influence this. We perform an in-depth single molecule characterization of the C-terminal association and dissociation of Hsp90. We find more than one dissociation rate, indicating that the dimer has a stable and an unstable state. Furthermore, we find that the stability of the C-terminal association is dependent on the presence of ATP, despite the C-terminal dimerization interface being distal to the catalytic site.

Original languageEnglish
Pages (from-to)11373-11380
Number of pages8
JournalJournal of Physical Chemistry B
Volume122
Issue number49
DOIs
Publication statusPublished - 13-Dec-2018
Externally publishedYes

Keywords

  • CONFORMATIONAL DYNAMICS
  • ATP HYDROLYSIS
  • PROTEIN
  • DIMERIZATION
  • ISOMERIZATION
  • SPECTROSCOPY
  • GROWTH
  • DOMAIN
  • CPR7

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