Cited by 52Ubiquitin and proteasome pathwaysEnzyme Structure and FunctionProtein Degradation and Inhibitors

Structural Studies of HHARI/UbcH7∼Ub Reveal Unique E2∼Ub Conformational Restriction by RBR RING1

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Dove, Katja K., Olszewski, Jennifer L., Martino, Luigi, Duda, David M., Wu, Xiaoli S., Miller, Darcie J., Reiter, Katherine H., Rittinger, Katrin +2 more·2017·Structure

Abstract

RING-between-RING (RBR) E3s contain RING1 domains that are structurally similar yet mechanistically distinct from canonical RING domains. Both types of E3 bind E2∼ubiquitin (E2∼Ub) via their RINGs but canonical RING E3s promote closed E2∼Ub conformations required for direct Ub transfer from the E2 to substrate, while RBR RING1s promote open E2∼Ub to favor Ub transfer to the E3 active site. This different RING/E2∼Ub conformation determines its direct target, which for canonical RING E3s is typically a substrate or substrate-linked Ub, but is the E3 active-site cysteine in the case of RBR-type E3s. Here we show that a short extension of HHARI RING1, namely Zn 2+ -loop II, not present in any RING E3s, acts as a steric wedge to disrupt closed E2∼Ub, providing a structural explanation for the distinctive RING1-dependent conformational restriction mechanism utilized by RBR E3s.

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Authors
Dove, K. K., Olszewski, J. L., Martino, L., Duda, D. M., Wu, X. S., Miller, D. J., Reiter, K. H., Rittinger, K., Schulman, B. A., & Klevit, R. E.
Affiliations
  • University of Washington (US)
  • St. Jude Children's Research Hospital (US)
  • The Francis Crick Institute (GB)
Corresponding author
  • Schulman, Brenda A.
  • Klevit, Rachel E.
Venue
Structure
Publisher
Elsevier BV
Published
2017-06
Volume
25
Issue
6
Pages
890-900.e5
ISSN
0969-2126 (ISSN-L)
OpenAlex
W2617774976
Cited by
52
References
58
Citations by year
2026: 3 · 2025: 1 · 2024: 4 · 2023: 6 · 2022: 6 · 2021: 7 · 2020: 7 · 2019: 3 · 2018: 10 · 2017: 5
FWCI
2.79
Type
journal article
Language
en
Open access
Locations
  • Structure (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Figshare (submittedVersion, cc-by)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Funders
  • Wellcome Trust (PHS\u00A0NRSA 5T32 GM007270)
  • U.S. Department of Energy (DE-AC02-06CH11357)
  • Cancer Research UK (FC001142)
  • Howard Hughes Medical Institute (P41GM103403)
  • American Pain Society
  • National Institute of General Medical Sciences (R01 GM088055)
  • National Institutes of Health (S10 RR029205, P30CA021765, R37GM069530)
  • Medical Research Council
  • Francis Crick Institute
  • American Lebanese Syrian Associated Charities
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 › Protein Degradation and Inhibitors
Keywords
UbcH7, RBR E3 ubiquitin ligase, ubiquitination, protein structure
MeSH terms
Protein Domains, Binding Sites, Carrier Proteins, Humans, Models, Molecular, Protein Conformation, Zinc, Crystallography, X-Ray, Catalytic Domain, Ubiquitin, Ubiquitin-Conjugating Enzymes, Ubiquitin-Protein Ligases

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