Cited by 351Ubiquitin and proteasome pathwaysGenomics and Chromatin DynamicsCancer-related Molecular Pathways

E2-BRCA1 RING interactions dictate synthesis of mono- or specific polyubiquitin chain linkages

Christensen, Devin E, Brzovic, Peter S, Klevit, Rachel E·2007·Nature Structural & Molecular Biology

Abstract

An E3 ubiquitin ligase mediates the transfer of activated ubiquitin from an E2 ubiquitin-conjugating enzyme to its substrate lysine residues. Using a structure-based, yeast two-hybrid strategy, we discovered six previously unidentified interactions between the human heterodimeric RING E3 BRCA1-BARD1 and the human E2s UbcH6, Ube2e2, UbcM2, Ubc13, Ube2k and Ube2w. All six E2s bind directly to the BRCA1 RING motif and are active with BRCA1-BARD1 for autoubiquitination in vitro. Four of the E2s direct monoubiquitination of BRCA1. Ubc13-Mms2 and Ube2k direct the synthesis of Lys63- or Lys48-linked ubiquitin chains on BRCA1 and require an acceptor ubiquitin attached to BRCA1. Differences between the mono- and polyubiquitination activities of the BRCA1-interacting E2s correlate with their ability to bind ubiquitin noncovalently at a site distal to the active site. Thus, BRCA1 has the ability to direct the synthesis of specific polyubiquitin chain linkages, depending on the E2 bound to its RING.

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Authors
Christensen, D. E., Brzovic, P. S., & Klevit, R. E.
Affiliations
University of Washington (US)
Corresponding author
Klevit, Rachel E
Venue
Nature Structural & Molecular Biology
Published
2007-09-16
Volume
14
Issue
10
Pages
941-948
ISSN
  • 1545-9985 (ISSN-L)
  • 1545-9993
OpenAlex
W2041517382
Cited by
351
References
30
Citations by year
2026: 3 · 2025: 12 · 2024: 10 · 2023: 12 · 2022: 17 · 2021: 16 · 2020: 12 · 2019: 18 · 2018: 18 · 2017: 16 · 2016: 18 · 2015: 19 · 2014: 21 · 2013: 20 · 2012: 23
FWCI
11.25
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Structural & Molecular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Cancer Institute (R01CA079953)
  • National Institute of General Medical Sciences (T32GM007270)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
BRCA1, BARD1, E3 ubiquitin ligase, E2 ubiquitin-conjugating enzyme, RING domain, monoubiquitination, K63-linked ubiquitin, K48-linked ubiquitin, UBE2K, autoubiquitination, ubiquitin transfer
MeSH terms
Amino Acid Sequence, Humans, Models, Molecular, Molecular Sequence Data, Recombinant Fusion Proteins, Sequence Alignment, BRCA1 Protein, Two-Hybrid System Techniques, Protein Structure, Quaternary, Tumor Suppressor Proteins, Polyubiquitin, Ubiquitin-Conjugating Enzymes, Ubiquitin-Protein Ligases, RING Finger Domains

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