Cited by 34Ubiquitin and proteasome pathwaysEnzyme Structure and FunctionProtein Structure and Dynamics

Molecular Architecture of the Ankyrin SOCS Box Family of Cul5-Dependent E3 Ubiquitin Ligases

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Muniz, João R.C., Guo, Kunde, Kershaw, Nadia J., Ayinampudi, Vikram, von Delft, Frank, Babon, Jeffrey J., Bullock, Alex N.·2013·Journal of Molecular Biology

Abstract

Multi-subunit Cullin-RING E3 ligases often use repeat domain proteins as substrate-specific adaptors. Structures of these macromolecular assemblies are determined for the F-box-containing leucine-rich repeat and WD40 repeat families, but not for the suppressor of cytokine signaling (SOCS)-box-containing ankyrin repeat proteins (ASB1-18), which assemble with Elongins B and C and Cul5. We determined the crystal structures of the ternary complex of ASB9-Elongin B/C as well as the interacting N-terminal domain of Cul5 and used structural comparisons to establish a model for the complete Cul5-based E3 ligase. The structures reveal a distinct architecture of the ASB9 complex that positions the ankyrin domain coaxial to the SOCS box-Elongin B/C complex and perpendicular to other repeat protein complexes. This alternative architecture appears favorable to present the ankyrin domain substrate-binding site to the E2-ubiquitin, while also providing spacing suitable for bulky ASB9 substrates, such as the creatine kinases. The presented Cul5 structure also differs from previous models and deviates from other Cullins via a rigid-body rotation between Cullin repeats. This work highlights the adaptability of repeat domain proteins as scaffolds in substrate recognition and lays the foundation for future structure-function studies of this important E3 family.

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  • Structural data for ASB9 reveal juxtaposed hydrophobic cavities in the substrate-binding domain.

    “structural data for ASB9 reveal juxtaposed hydrophobic cavities in the substrate-binding domain”

    From Targeted protein degradation: expanding the toolbox (2019) · cites this paper as [105]

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Authors
Muniz, J. R. C., Guo, K., Kershaw, N. J., Ayinampudi, V., von Delft, F., Babon, J. J., & Bullock, A. N.
Affiliations
  • University of Oxford (GB)
  • The University of Melbourne (AU)
Corresponding author
Bullock, Alex N.
Venue
Journal of Molecular Biology
Publisher
Elsevier BV
Published
2013-09
Volume
425
Issue
17
Pages
3166-3177
ISSN
0022-2836 (ISSN-L)
OpenAlex
W2084647140
Cited by
34
References
62
Citations by year
2025: 2 · 2024: 2 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 2 · 2018: 2 · 2017: 3 · 2016: 4 · 2015: 9 · 2014: 5 · 2013: 1
FWCI
2.84
Type
journal article
Language
en
Open access
Locations
  • Journal of Molecular Biology (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion, cc-by-nc-nd)
Funders
  • National Health and Medical Research Council of Australia (NHMRC) (1011804)
  • Victorian State Government Operational Infrastructure Support
  • NHMRC Independent Research Institutes Infrastructure Support Scheme (361646)
  • Australian Research Council
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 Structure and Dynamics
Keywords
ankyrin repeat proteins, SOCS box, E3 ubiquitin ligase, Elongin B/C, Cullin-RING E3 ligases, substrate recognition, ankyrin domain, creatine kinase, crystal structure, ternary complex
MeSH terms
Amino Acid Sequence, Animals, Binding Sites, Humans, Molecular Sequence Data, Protein Binding, Sequence Alignment, Ankyrins, Crystallography, X-Ray, Ubiquitin-Protein Ligases, Cullin Proteins, Suppressor of Cytokine Signaling Proteins, Mice

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