Cited by 78Protein Degradation and InhibitorsUbiquitin and proteasome pathwaysMultiple Myeloma Research and Treatments

UBE2G1 governs the destruction of cereblon neomorphic substrates

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Lu, Gang, Weng, Stephanie, Matyskiela, Mary, Zheng, Xinde, Fang, Wei, Wood, Scott, Surka, Christine, Mizukoshi, Reina +10 more·2018·eLife

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Abstract

The cereblon modulating agents (CMs) including lenalidomide, pomalidomide and CC-220 repurpose the Cul4-RBX1-DDB1-CRBN (CRL4CRBN) E3 ubiquitin ligase complex to induce the degradation of specific neomorphic substrates via polyubiquitination in conjunction with E2 ubiquitin-conjugating enzymes, which have until now remained elusive. Here we show that the ubiquitin-conjugating enzymes UBE2G1 and UBE2D3 cooperatively promote the K48-linked polyubiquitination of CRL4CRBN neomorphic substrates via a sequential ubiquitination mechanism. Blockade of UBE2G1 diminishes the ubiquitination and degradation of neomorphic substrates, and consequent antitumor activities elicited by all tested CMs. For example, UBE2G1 inactivation significantly attenuated the degradation of myeloma survival factors IKZF1 and IKZF3 induced by lenalidomide and pomalidomide, hence conferring drug resistance. UBE2G1-deficient myeloma cells, however, remained sensitive to a more potent IKZF1/3 degrader CC-220. Collectively, it will be of fundamental interest to explore if loss of UBE2G1 activity is linked to clinical resistance to drugs that hijack the CRL4CRBN to eliminate disease-driving proteins.

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  • Several functional genomics campaigns have helped map how the repertoire of CRLs and their regulators shape degrader efficacy, outlining putative resistance mechanisms.

    “Several functional genomics campaigns in recent years have helped map how the repertoire of CLRs and their regulators shape degrader efficacy, thus also outlining putative resistance mechanisms.141-151”

    From Chasing molecular glue degraders: screening approaches (2022) · cites this paper as [143]

  • ZF2 mediates tight immunomodulatory-drug dependent interaction sufficient to target degradation.

    “Our assay for CRL4CRBN ubiquitylation of IKZF was established based on findings that ZF2 mediates tight immunomodulatory-drug dependent interaction sufficient to target degradation, UBE2D3 contributes to stability of CRL4CRBN neomorphic substrates in cells57,60,61.”
  • UBE2D3 contributes to stability of CRL4CRBN neomorphic substrates in cells.

    “Our assay for CRL4CRBN ubiquitylation of IKZF was established based on findings that ZF2 mediates tight immunomodulatory-drug dependent interaction sufficient to target degradation, UBE2D3 contributes to stability of CRL4CRBN neomorphic substrates in cells57,60,61.”

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Authors
Lu, G., Weng, S., Matyskiela, M., Zheng, X., Fang, W., Wood, S., Surka, C., Mizukoshi, R., Lu, C.-C., Mendy, D., Jang, I. S., Wang, K., Marella, M., Couto, S., Cathers, B., Carmichael, J., Chamberlain, P., & Rolfe, M.
Affiliations
Celgene Corporation, San Diego, United States
Corresponding author
Lu, Gang
Venue
eLife
Published
2018-09-20
Volume
7
ISSN
2050-084X (ISSN-L)
OpenAlex
W2885735594
Cited by
78
References
49
Citations by year
2026: 8 · 2025: 2 · 2024: 16 · 2023: 6 · 2022: 17 · 2021: 15 · 2020: 7 · 2019: 7
FWCI
2.58
Type
journal article
Language
en
Open access
Locations
  • eLife (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Celgene
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
  • Health Sciences › Medicine › Hematology › Multiple Myeloma Research and Treatments
Keywords
UBE2D3, lenalidomide, pomalidomide, K48-linked polyubiquitination, IKZF1, IKZF3, multiple myeloma, drug resistance, protein degradation
MeSH terms
Amino Acid Sequence, Humans, Peptide Hydrolases, Substrate Specificity, Thalidomide, Ubiquitin-Conjugating Enzymes, Ubiquitin-Protein Ligases, Cell Line, Tumor, Adaptor Proteins, Signal Transducing, Ikaros Transcription Factor, Receptors, Interleukin-17, Ubiquitination, HEK293 Cells, Proteolysis

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