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USE1 is a bispecific conjugating enzyme for ubiquitin and FAT10, which FAT10ylates itself in cis

Author

Listed:
  • Annette Aichem

    (Biotechnology Institute Thurgau at the University of Konstanz)

  • Christiane Pelzer

    (University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

  • Sebastian Lukasiak

    (University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

  • Birte Kalveram

    (University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

  • Paul W. Sheppard

    (Enzo Life Sciences (UK) Ltd, Palatine House, Matford Court, Exeter EX2 8NL, UK.)

  • Neha Rani

    (University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

  • Gunter Schmidtke

    (University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

  • Marcus Groettrup

    (Biotechnology Institute Thurgau at the University of Konstanz
    University of Konstanz, Universitaetsstr. 10, 78457 Konstanz, Germany.)

Abstract

The ubiquitin-like modifier FAT10 targets proteins for degradation by the proteasome and is activated by the E1 enzyme UBA6. In this study, we identify the UBA6-specific E2 enzyme (USE1) as an interaction partner of FAT10. Activated FAT10 can be transferred from UBA6 onto USE1 in vitro, and endogenous USE1 and FAT10 can be coimmunoprecipitated from intact cells. Small interfering RNA-mediated downregulation of USE1 mRNA resulted in a strong reduction of FAT10 conjugate formation under endogenous conditions, suggesting that USE1 is a major E2 enzyme in the FAT10 conjugation cascade. Interestingly, USE1 is not only the first E2 enzyme but also the first known substrate of FAT10 conjugation, as it was efficiently auto-FAT10ylated in cis but not in trans.

Suggested Citation

  • Annette Aichem & Christiane Pelzer & Sebastian Lukasiak & Birte Kalveram & Paul W. Sheppard & Neha Rani & Gunter Schmidtke & Marcus Groettrup, 2010. "USE1 is a bispecific conjugating enzyme for ubiquitin and FAT10, which FAT10ylates itself in cis," Nature Communications, Nature, vol. 1(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:1:y:2010:i:1:d:10.1038_ncomms1012
    DOI: 10.1038/ncomms1012
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    Cited by:

    1. Ngoc Truongvan & Shurong Li & Mohit Misra & Monika Kuhn & Hermann Schindelin, 2022. "Structures of UBA6 explain its dual specificity for ubiquitin and FAT10," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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