Proteasome plasticity

Michael H. Glickman, Dina Raveh

Research output: Contribution to journalShort surveypeer-review

91 Scopus citations

Abstract

The 26S proteasome is responsible for regulated proteolysis of most intracellular proteins yet the focus of intense regulatory action itself. Proteasome abundance is responsive to cell needs or stress conditions, and dynamically localized to concentrations of substrates. Proteasomes are continually assembled and disassembled, and their subunits subject to a variety of posttranslational modifications. Furthermore, as robust and multi-tasking as this complex is, it does not function alone. A spattering of closely associating proteins enhances complex stability, fine-tunes activity, assists in substrate-binding, recycling of ubiquitin, and more. HEAT repeat caps activate proteasomes, yet share remarkable features with nuclear importins. Fascinating cross talk even occurs with ribosomes through common maturation factors. The dynamics of proteasome configurations and how they relate to diverse activities is the topic of this review.

Original languageEnglish
Pages (from-to)3214-3223
Number of pages10
JournalFEBS Letters
Volume579
Issue number15
DOIs
StatePublished - 13 Jun 2005

Keywords

  • HEAT
  • Importin
  • Proteasome
  • Proteolysis
  • Ribosome
  • Ubiquitin

ASJC Scopus subject areas

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

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