Cited by 241Ubiquitin and proteasome pathwaysEnzyme Structure and FunctionHeat shock proteins research

Regulated protein turnover: snapshots of the proteasome in action

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Bhattacharyya, Sucharita, Yu, Houqing, Mim, Carsten, Matouschek, Andreas·2014·Nature Reviews Molecular Cell Biology

Abstract

The ubiquitin proteasome system (UPS) is the main ATP-dependent protein degradation pathway in the cytosol and nucleus of eukaryotic cells. At its centre is the 26S proteasome, which degrades regulatory proteins and misfolded or damaged proteins. In a major breakthrough, several groups have determined high-resolution structures of the entire 26S proteasome particle in different nucleotide conditions and with and without substrate using cryo-electron microscopy combined with other techniques. These structures provide some surprising insights into the functional mechanism of the proteasome and will give invaluable guidance for genetic and biochemical studies of this key regulatory system.

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  • The base subunits Rpt1-6/PSMC1-6 utilize ATP hydrolysis to deubiquitinate, unfold and translocate substrates into the proteolytic chamber of the 20S core particle.

    “the base subunits Rpt1-6/PSMC1-6 utilize ATP hydrolysis to deubiquitinate, unfold and translocate substrates into the proteolytic chamber of the 20S core particle, where they are degraded into oligopeptides.”

    From Investigating the neuronal role of the proteasomal ATPase subunit gene PSMC5 in neurodevelopmental proteasomopathies (2025) · cites this paper as [1]

    The “Action of the ATPase motor” section (page unavailable) identifies Rpt1–6 as the motor that unfolds substrates and moves them toward the core particle. But “Removing ubiquitin chains” (page unavailable) assigns deubiquitination to Rpn11, not to Rpt1–6; it says Rpn11’s cleavage depends on ATP hydrolysis because it is coupled to translocation. (LLM, conf=0.90)

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Authors
Bhattacharyya, S., Yu, H., Mim, C., & Matouschek, A.
Affiliations
Northwestern University (US)
Corresponding author
Matouschek, Andreas
Venue
Nature Reviews Molecular Cell Biology
Published
2014-01-23
Volume
15
Issue
2
Pages
122-133
ISSN
  • 1471-0072 (ISSN-L)
  • 1471-0080
OpenAlex
W2068408381
Cited by
240
References
185
Citations by year
2026: 7 · 2025: 7 · 2024: 11 · 2023: 10 · 2022: 14 · 2021: 12 · 2020: 21 · 2019: 21 · 2018: 29 · 2017: 33 · 2016: 25 · 2015: 36 · 2014: 13
FWCI
3.36
Type
journal article
Language
en
Open access
Locations
  • Nature Reviews Molecular Cell Biology (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Foundation for the National Institutes of Health
  • Bill and Melinda Gates Foundation
  • Welch Foundation
  • European Molecular Biology Laboratory
  • National Institutes of Health
  • National Cancer Institute (U54CA143869)
  • National Institute of General Medical Sciences (U54GM105816, R01GM63004, R01GM063004, R01GM094479)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
26S proteasome, ubiquitin-proteasome system, protein degradation, protein turnover, proteasome structure, misfolded protein degradation
MeSH terms
Cell Nucleus, Cytosol, Proteins, Cryoelectron Microscopy, Ubiquitin, Multiprotein Complexes, Proteasome Endopeptidase Complex, Proteolysis

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