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Detection of Protein Ubiquitination
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Ubiquitination-Driven Reprogramming of Proteostasis in Metastasis.

Dongping Wei1, Jiayan Chen2, Yaping Xu3

  • 1Medical Research Center, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 21, 2026
PubMed
Summary

Researchers discovered a new cancer metastasis pathway involving DCAF12 and TRiC/CCT chaperonins. This axis promotes cancer adaptation by enhancing protein folding, offering new therapeutic targets to disrupt cancer

Keywords:
DCAF12TRiC/CCTmetastasisproteostasisubiquitination

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Cancer Research

Background:

  • Metastasis drives cancer mortality, necessitating proteome adaptation.
  • Ubiquitination typically signals protein degradation, but its role in metastasis is complex.
  • The Cullin 4-RING ubiquitin ligase complex plays a role in cellular regulation.

Purpose of the Study:

  • To elucidate a non-canonical ubiquitination mechanism promoting metastasis.
  • To identify DCAF12 as a key regulator of cancer cell adaptation.
  • To explore the DCAF12-TRiC/CCT axis as a therapeutic target.

Main Methods:

  • Investigated DCAF12's role in the Cullin 4-RING ubiquitin ligase complex.
  • Analyzed non-degradative ubiquitination of TRiC/CCT chaperonin subunits.
  • Examined the impact of DCAF12-mediated ubiquitination on chaperonin function and protein folding.

Main Results:

  • DCAF12 mediates non-degradative ubiquitination of TRiC/CCT subunits.
  • This ubiquitination allosterically activates TRiC/CCT, enhancing folding capacity.
  • The DCAF12-TRiC/CCT axis facilitates proteome reprogramming in metastatic cells.

Conclusions:

  • The DCAF12-TRiC/CCT axis is crucial for adaptive proteostasis in metastasis.
  • DCAF12 represents a new class of 'DCAFome' regulators of chaperone function.
  • Targeting this axis offers a therapeutic strategy to combat advanced cancers.