Ter94 atpase complex targets k11-linked ubiquitinated ci to proteasomes for partial degradation

Zhao Zhang, Xiangdong Lv, Wen chi Yin, Xiaoyun Zhang, Jing Feng, Wenqing Wu, Chi chung Hui, Lei Zhang, Yun Zhao

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


The Cubitus interruptus (Ci)/Gli family of transcription factors can be degraded either completely or partially from a full-length form (Ci155/GliFL) to a truncated repressor (Ci75/GliR) by proteasomes to mediate Hedgehog (Hh) signaling. The mechanism by which proteasomes distinguish ubiquitinated Ci/Gli to carry out complete versus partial degradation is not known. Here, we show that Ter94 ATPase and its mammalian counterpart, p97, are involved in processing Ci and Gli3 into Ci75 and Gli3R, respectively. Ter94 regulates the partial degradation of ubiquitinated Ci by Cul1-Slimb-based E3 ligase through its adaptors Ufd1-like and dNpl4. Wedemonstrate that Cul1-Slimb-based E3 ligase, but notCul3-Rdx-based E3 ligase, modifies Ci by efficientaddition of K11-linked ubiquitin chains. Ter94Ufd1-like/dNpl4 complex interacts directly with Cul1-Slimb, and, intriguingly, it prefers K11-linked ubiquitinated Ci. Thus, Ter94 ATPase and K11-linked ubiquitination in Ci contribute to the selectivity by proteasomes for partial degradation.

Original languageEnglish (US)
Pages (from-to)636-644
Number of pages9
JournalDevelopmental cell
Issue number6
StatePublished - Jun 24 2013
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Developmental Biology
  • Cell Biology


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