JAMM: A Metalloprotease-Like Zinc Site in the Proteasome and Signalosome
Journal Article
·
· PLoS Biology (Online)
- California Institute of Technology (CalTech), Pasadena, CA (United States). Division of Biology; DOE/OSTI
- California Institute of Technology (CalTech), Pasadena, CA (United States). Division of Chemistry and Chemical Engineering; Howard Hughes Medical Inst., Chevy Chase, MD (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States). Division of Biology; Howard Hughes Medical Inst., Chevy Chase, MD (United States)
The JAMM (JAB1/MPN/Mov34 metalloenzyme) motif in Rpn11 and Csn5 underlies isopeptidase activities intrinsic to the proteasome and signalosome, respectively. We show here that the archaebacterial protein AfJAMM possesses the key features of a zinc metalloprotease, yet with a distinct fold. The histidine and aspartic acid of the conserved EXnHS/ THX7SXXD motif coordinate a zinc, whereas the glutamic acid hydrogen-bonds an aqua ligand. By analogy to the active site of thermolysin, we predict that the glutamic acid serves as an acid-base catalyst and the second serine stabilizes a tetrahedral intermediate. Mutagenesis of Csn5 confirms these residues are required for Nedd8 isopeptidase activity. The active site-like architecture specified by the JAMM motif motivates structure-based approaches to the study of JAMM domain proteins and the development of therapeutic proteasome and signalosome inhibitors.
- Research Organization:
- SLAC National Accelerator Laboratory, Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource (SSRL); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- AC02-76SF00515; AC03-76SF00098
- OSTI ID:
- 1627129
- Journal Information:
- PLoS Biology (Online), Journal Name: PLoS Biology (Online) Journal Issue: 1 Vol. 2; ISSN 1545-7885
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
JAMM: A Metalloprotease-like zinc site in the proteasome and signalosome
Ubiquitin-Like Proteasome System Represents a Eukaryotic-Like Pathway for Targeted Proteolysis in Archaea
Dual function of Rpn5 in two PCI complexes, the 26S proteasome and COP9 signalosome
Journal Article
·
Mon Jun 27 00:00:00 EDT 2005
· PLoS Biol.2:113,2004
·
OSTI ID:890284
Ubiquitin-Like Proteasome System Represents a Eukaryotic-Like Pathway for Targeted Proteolysis in Archaea
Journal Article
·
Tue May 17 00:00:00 EDT 2016
· mBio (Online)
·
OSTI ID:1361621
Dual function of Rpn5 in two PCI complexes, the 26S proteasome and COP9 signalosome
Journal Article
·
Tue Feb 01 23:00:00 EST 2011
· Molecular Biology of the Cell
·
OSTI ID:1625223