Cited by 1,218Cell death mechanisms and regulationNF-κB Signaling PathwaysUbiquitin and proteasome pathways

IAP Antagonists Induce Autoubiquitination of c-IAPs, NF-κB Activation, and TNFα-Dependent Apoptosis

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Varfolomeev, Eugene, Blankenship, John W., Wayson, Sarah M., Fedorova, Anna V., Kayagaki, Nobuhiko, Garg, Parie, Zobel, Kerry, Dynek, Jasmin N. +7 more·2007·Cell

Abstract

Inhibitor of apoptosis (IAP) proteins are antiapoptotic regulators that block cell death in response to diverse stimuli. They are expressed at elevated levels in human malignancies and are attractive targets for the development of novel cancer therapeutics. Herein, we demonstrate that small-molecule IAP antagonists bind to select baculovirus IAP repeat (BIR) domains resulting in dramatic induction of auto-ubiquitination activity and rapid proteasomal degradation of c-IAPs. The IAP antagonists also induce cell death that is dependent on TNF signaling and de novo protein biosynthesis. Additionally, the c-IAP proteins were found to function as regulators of NF-kappaB signaling. Through their ubiquitin E3 ligase activities c-IAP1 and c-IAP2 promote proteasomal degradation of NIK, the central ser/thr kinase in the noncanonical NF-kappaB pathway.

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Crossref · 10.1016/j.cell.2007.10.030

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  • The switch between target substrate ubiquitylation and autoubiquitylation following changes in binding partner might be a general feature of RING E3 ligases, since ligand binding to IAP stimulates IAP auto-destruction.

    “This switch between target substrate ubiquitylation and autoubiquitylation following changes in binding partner might be a general feature of RING E3 ligases, since ligand binding to IAP (a member of the RING E3 inhibitor of apoptosis proteins) stimulates IAP auto-destruction [43].”

    From The p53 orchestra: Mdm2 and Mdmx set the tone (2010) · cites this paper as [43]

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Authors
Varfolomeev, E., Blankenship, J. W., Wayson, S. M., Fedorova, A. V., Kayagaki, N., Garg, P., Zobel, K., Dynek, J. N., Elliott, L. O., Wallweber, H. J. A., Flygare, J. A., Fairbrother, W. J., Deshayes, K., Dixit, V. M., & Vucic, D.
Affiliations
Genentech (US)
Corresponding author
  • Dixit, Vishva M.
  • Vucic, Domagoj
Venue
Cell
Publisher
Elsevier BV
Published
2007-11
Volume
131
Issue
4
Pages
669-681
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2064299413
Cited by
1,218
References
51
Citations by year
2026: 28 · 2025: 24 · 2024: 39 · 2023: 45 · 2022: 41 · 2021: 60 · 2020: 59 · 2019: 54 · 2018: 69 · 2017: 64 · 2016: 78 · 2015: 80 · 2014: 100 · 2013: 78 · 2012: 71
FWCI
33.22
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
Funders
Genentech
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cell death mechanisms and regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › NF-κB Signaling Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
inhibitor of apoptosis proteins, IAP antagonists, cIAP1, cIAP2, autoubiquitination, proteasomal degradation, NF-κB signaling, non-canonical NF-κB signaling, NIK, TNF signaling, apoptosis, cancer therapeutics
MeSH terms
Animals, Cell Line, Humans, Neoplasms, Tumor Necrosis Factor-alpha, Molecular Structure, Signal Transduction, NF-kappa B, Apoptosis, Protein Structure, Tertiary, Polyubiquitin, Proteasome Endopeptidase Complex, Inhibitor of Apoptosis Proteins, Mice, Ubiquitination

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