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Detecting Posttranslational Modifications of Hsp90 Isoforms

  • SUNY Upstate Medical University
  • National Institutes of Health

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

1 Scopus citations

Abstract

The molecular chaperone heat shock protein 90 (Hsp90) is essential in eukaryotes. Hsp90 chaperones proteins that are important determinants of multistep carcinogenesis. There are multiple Hsp90 isoforms including the cytosolic Hsp90α and Hsp90β as well as GRP94 located in the endoplasmic reticulum and TRAP1 in the mitochondria. The chaperone function of Hsp90 is linked to its ability to bind and hydrolyze ATP. Co-chaperones and posttranslational modifications (such as phosphorylation, SUMOylation, and ubiquitination) are important for Hsp90 stability and regulation of its ATPase activity. Both mammalian and yeast cells can be used to express and purify Hsp90 and TRAP1 and also detect post-translational modifications by immunoblotting.

Original languageEnglish
Title of host publicationMethods in Molecular Biology
PublisherHumana Press Inc.
Pages125-139
Number of pages15
DOIs
StatePublished - 2023

Publication series

NameMethods in Molecular Biology
Volume2693

Keywords

  • Heat shock protein 90 (Hsp90)
  • Molecular chaperones
  • O-GlcNAcylation
  • Phosphorylation
  • Posttranslational modification
  • SUMOylation
  • TRAP1
  • Ubiquitination

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