Role of Predicted Metalloprotease Motif of Jab1/Csn5 in Cleavage of Nedd8 from Cul1
California Institute of Technology · University of California, Los Angeles · +3 more institutions
Abstract
COP9 signalosome (CSN) cleaves the ubiquitin-like protein Nedd8 from the Cul1 subunit of SCF ubiquitin ligases. The Jab1/MPN domain metalloenzyme (JAMM) motif in the Jab1/Csn5 subunit was found to underlie CSN's Nedd8 isopeptidase activity. JAMM is found in proteins from archaea, bacteria, and eukaryotes, including the Rpn11 subunit of the 26S proteasome. Metal chelators and point mutations within JAMM abolished CSN-dependent cleavage of Nedd8 from Cul1, yet had little effect on CSN complex assembly. Optimal SCF activity in yeast and both viability and proper photoreceptor cell (R cell) development in Drosophila melanogaster required an intact Csn5 JAMM domain. We propose that JAMM isopeptidases play important…
Citation impact
- FWCI
- 14.95
- Percentile
- 100%
- References
- 32
Authors
7- GAGregory A. CopeCorresponding
California Institute of Technology
- GSGreg S. B. Suh
University of California, Los Angeles
- LAL. Aravind
National Institutes of Health, National Center for Biotechnology Information
- SESylvia E. Schwarz
California Institute of Technology
- SLS Lawrence Zipursky
Howard Hughes Medical Institute, University of California, Los Angeles
Topics & keywords
- NEDD8
- Protein subunit
- Drosophila melanogaster
- COP9 signalosome
- Biology
- Ubiquitin
- Proteasome
- Schneider 2 cells