Cited by 486Ubiquitin and proteasome pathwaysProtein Degradation and InhibitorsEnzyme Structure and Function

Structures of SPOP-Substrate Complexes: Insights into Molecular Architectures of BTB-Cul3 Ubiquitin Ligases

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Zhuang, Min, Calabrese, Matthew F., Liu, Jiang, Waddell, M. Brett, Nourse, Amanda, Hammel, Michal, Miller, Darcie J., Walden, Helen +6 more·2009·Molecular Cell

Abstract

In the largest E3 ligase subfamily, Cul3 binds a BTB domain, and an associated protein-interaction domain such as MATH recruits substrates for ubiquitination. Here, we present biochemical and structural analyses of the MATH-BTB protein, SPOP. We define a SPOP-binding consensus (SBC) and determine structures revealing recognition of SBCs from the phosphatase Puc, the transcriptional regulator Ci, and the chromatin component MacroH2A. We identify a dimeric SPOP-Cul3 assembly involving a conserved helical structure C-terminal of BTB domains, which we call "3-box" due to its facilitating Cul3 binding and its resemblance to F-/SOCS-boxes in other cullin-based E3s. Structural flexibility between the substrate-binding MATH and Cul3-binding BTB/3-box domains potentially allows a SPOP dimer to engage multiple SBCs found within a single substrate, such as Puc. These studies provide a molecular understanding of how MATH-BTB proteins recruit substrates to Cul3 and how their dimerization and conformational variability may facilitate avid interactions with diverse substrates.

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Crossref · 10.1016/j.molcel.2009.09.022

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  • BTB-containing E3 ligases are typically distinguished by a 3-box motif that enables high-affinity binding of Cullin 3.

    “BTB-containing E3 ligases are typically distinguished by the presence of a 3-box motif that enables high-affinity binding of Cullin 3 (refs 74,75 ).”

    From Targeted protein degradation: expanding the toolbox (2019) · cites this paper as [75]

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Authors
Zhuang, M., Calabrese, M. F., Liu, J., Waddell, M. B., Nourse, A., Hammel, M., Miller, D. J., Walden, H., Duda, D. M., Seyedin, S. N., Hoggard, T., Harper, J. W., White, K. P., & Schulman, B. A.
Affiliations
  • St. Jude Children's Research Hospital (US)
  • University of Chicago (US)
  • Lawrence Berkeley National Laboratory (US)
  • University of Wisconsin System (US)
  • Harvard University (US)
Corresponding author
Schulman, Brenda A.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2009-10
Volume
36
Issue
1
Pages
39-50
ISSN
1097-2765 (ISSN-L)
OpenAlex
W1993550226
Cited by
486
References
60
Citations by year
2026: 29 · 2025: 38 · 2024: 27 · 2023: 35 · 2022: 39 · 2021: 50 · 2020: 45 · 2019: 32 · 2018: 25 · 2017: 28 · 2016: 23 · 2015: 25 · 2014: 28 · 2013: 24 · 2012: 14
FWCI
4.66
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Howard Hughes Medical Institute (DRG 2021-9)
  • National Cancer Institute (CA92584, P01CA092584, P30CA021765)
  • National Institute of General Medical Sciences (R01GM070565, R01GM069530, GM070565)
  • National Center for Research Resources (RR 15301, P41RR015301)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Physical Sciences › Materials Science › Materials Chemistry › Enzyme Structure and Function
Keywords
SPOP, BTB domain, CUL3, E3 ubiquitin ligase, MATH domain, substrate recognition, macroH2A, protein dimerization, SOCS box
MeSH terms
Amino Acid Sequence, Animals, DNA-Binding Proteins, Drosophila melanogaster, Histones, Humans, Models, Molecular, Mutation, Nuclear Proteins, Peptide Fragments, Phosphoprotein Phosphatases, Protein Binding, Recombinant Fusion Proteins, Repressor Proteins, Transcription Factors, Consensus Sequence, Crystallography, X-Ray, Molecular Chaperones, Protein Structure, Quaternary, Drosophila Proteins, Ubiquitin-Protein Ligases, Cullin Proteins, Adaptor Proteins, Signal Transducing, Protein Interaction Domains and Motifs, Ubiquitination, Protein Multimerization, Co-Repressor Proteins

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