Cited by 108Ubiquitin and proteasome pathwaysProtein Degradation and InhibitorsMicrotubule and mitosis dynamics

Cand1-Mediated Adaptive Exchange Mechanism Enables Variation in F-Box Protein Expression

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Liu, Xing, Reitsma, Justin M., Mamrosh, Jennifer L., Zhang, Yaru, Straube, Ronny, Deshaies, Raymond J.·2018·Molecular Cell

Abstract

Skp1⋅Cul1⋅F-box (SCF) ubiquitin ligase assembly is regulated by the interplay of substrate binding, reversible Nedd8 conjugation on Cul1, and the F-box protein (FBP) exchange factors Cand1 and Cand2. Detailed investigations into SCF assembly and function in reconstituted systems and Cand1/2 knockout cells informed the development of a mathematical model for how dynamical assembly of SCF complexes is controlled and how this cycle is coupled to degradation of an SCF substrate. Simulations predicted an unanticipated hypersensitivity of Cand1/2-deficient cells to FBP expression levels, which was experimentally validated. Together, these and prior observations lead us to propose the adaptive exchange hypothesis, which posits that regulation of the k off of an FBP from SCF by the actions of substrate, Nedd8, and Cand1 molds the cellular repertoire of SCF complexes and that the plasticity afforded by this exchange mechanism may enable large variations in FBP expression during development and in FBP gene number during evolution.

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Crossref · 10.1016/j.molcel.2018.01.038

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  • The conformational dynamics of unneddylated CRLs would enable transitioning between the different conformations coordinating cycles of neddylation/deneddylation with CAND1-driven substrate-receptor exchange.

    “it seems likely that the conformational dynamics of unneddylated CRLs (Extended Data Figure 2) would enable transitioning between the different conformations coordinating cycles of neddylation/deneddylation with CAND1-driven substrate-receptor exchange39,46–49.”

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Authors
Liu, X., Reitsma, J. M., Mamrosh, J. L., Zhang, Y., Straube, R., & Deshaies, R. J.
Affiliations
  • California Institute of Technology (US)
  • Max Planck Institute for Dynamics of Complex Technical Systems (DE)
Corresponding author
  • Straube, Ronny
  • Deshaies, Raymond J.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2018-03
Volume
69
Issue
5
Pages
773-786.e6
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2791421524
Cited by
108
References
58
Citations by year
2026: 6 · 2025: 9 · 2024: 15 · 2023: 18 · 2022: 16 · 2021: 10 · 2020: 23 · 2019: 7 · 2018: 4
FWCI
3.91
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • CaltechAUTHORS (California Institute of Technology) (submittedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
Funders
  • The Jane Coffin Childs Memorial Fund for Medical Research (JCCMF)
  • JCCMF (GM112308)
  • NIH (GM065997)
  • Life Sciences Research Foundation
  • Howard Hughes Medical Institute (HHMI)
  • HHMI
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Microtubule and mitosis dynamics
Keywords
SCF ubiquitin ligase, F-box protein, CAND1, neddylation, CUL1, substrate binding
MeSH terms
NEDD8 Protein, Animals, Gene Expression Regulation, Models, Biological, Models, Chemical, Transcription Factors, F-Box Proteins, Cullin Proteins, Mice, Proteolysis

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