Cited by 31Redox biology and oxidative stressCancer-related Molecular PathwaysAlzheimer's disease research and treatments

Cysteine oxidation triggers amyloid fibril formation of the tumor suppressor p16INK4A

Open access
Göbl, Christoph, Morris, Vanessa K., van Dam, Loes, Visscher, Marieke, Polderman, Paulien E., Hartlmüller, Christoph, de Ruiter, Hesther, Hora, Manuel +6 more·2020·Redox Biology

Published version of a preprint

Abstract

Abstract Accumulation of the CDK4/6 inhibitor p16 INK4A in response to oncogenic transformation leads to cell cycle arrest and senescence and is therefore frequently lost in cancer. p16 INK4A is also known to accumulate under conditions of oxidative stress and thus could potentially be regulated by the reversible oxidation of cysteines (redox signaling). Indeed, oxidation of the single cysteine in p16 INK4A in human cells occurs under relatively mild oxidizing conditions and leads to disulfide-dependent dimerization. p16 INK4A is an all alpha-helical protein, but here we report that upon cysteine-dependent dimerization, p16 INK4A undergoes a dramatic structural rearrangement and forms aggregates that have the typical features of amyloid fibrils, including binding of diagnostic dyes, presence of cross-β sheet structure, and typical dimensions found in electron microscopy. p16 INK4A amyloid formation abolishes its function as a CDK4/6 inhibitor. Collectively, these observations mechanistically link the cellular redox state to the inactivation of p16 INK4A through the formation of amyloid fibrils.

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Crossref · 10.1016/j.redox.2019.101316

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Authors
Göbl, C., Morris, V. K., van Dam, L., Visscher, M., Polderman, P. E., Hartlmüller, C., de Ruiter, H., Hora, M., Liesinger, L., Birner-Gruenberger, R., Vos, H. R., Reif, B., Madl, T., & Dansen, T. B.
Affiliations
  • Center for Integrated Protein Science Munich (DE)
  • University Medical Center Utrecht (NL)
  • Medical University of Graz (AT)
Corresponding author
  • Madl, Tobias
  • Dansen, Tobias B.
Venue
Redox Biology
Publisher
Elsevier BV
Published
2020-01
Volume
28
Pages
101316
ISSN
2213-2317 (ISSN-L)
OpenAlex
W2972098902
Cited by
29
References
75
Citations by year
2026: 3 · 2025: 2 · 2024: 6 · 2023: 2 · 2022: 5 · 2021: 5 · 2020: 6
FWCI
1.32
Type
journal article
Language
en
Open access
Locations
  • Redox Biology (publishedVersion, cc-by-nc-nd)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PuSH - Publication Server of Helmholtz Zentrum München (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Utrecht University Repository (Utrecht University) (submittedVersion, other-oa)
  • UC Research Repository (University of Canterbury) (submittedVersion, cc-by-nc-nd)
  • mediaTUM (Technical University of Munich) (submittedVersion, other-oa)
  • Site cant be reached (submittedVersion, cc-by-nc-nd)
Funders
  • Österreichische Forschungsförderungsgesellschaft (870454, 864690)
  • KWF Kankerbestrijding
  • Chinese Academy of Sciences (2015VBB045)
  • National Natural Science Foundation of China (31450110423, KLI425, KLI645)
  • Austrian Science Fund (DK-MCD W1226, I3792, P28854)
  • National Health and Medical Research Council
  • BioTechMed-Graz
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
p16INK4a, cysteine oxidation, amyloid fibril formation, redox signaling, protein dimerization, disulfide bonds, protein aggregation, cross-β sheet, CDK4/6 inhibition, tumor suppressor inactivation, oxidative stress, protein structural rearrangement
MeSH terms
Amyloid, Cell Cycle, Cysteine, Humans, Models, Molecular, Oxidation-Reduction, Cellular Senescence, Protein Structure, Secondary, Cyclin-Dependent Kinase Inhibitor p16, Protein Multimerization, HEK293 Cells

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