Ubiquitin-Like Protein $$\mathrm{SAMP1}$$ and $$\mathrm{JAMM/MPN+}$$ Metalloprotease $$\mathrm{HvJAMM1}$$ Constitute a System for Reversible Regulation of Metabolic Enzyme Activity in Archaea
- University of Florida, Gainesville, FL (United States); Univ. of Florida, Gainesville, FL (United States)
- University of Florida, Gainesville, FL (United States)
Ubiquitin/ubiquitin-like (Ub/Ubl) proteins are involved in diverse cellular processes by their covalent linkage to P1) and a JAMM/MPN+ metalloprotease (HvJAMM1). Molybdopterin (MPT) synthasprotein substrates. Here, we provide evidence for a post-translational modification system that regulates enzyme activity which is composed of an archaeal Ubl protein (SAMe activity was found to be inhibited by covalent linkage of SAMP1 to the large subunit (MoaE) of MPT synthase. HvJAMM1 was shown to cleave the covalently linked inactive form of SAMP1-MoaE to the free functional individual SAMP1 and MoaE subunits of MPT synthase, suggesting reactivation of MPT synthase by this metalloprotease. Overall, this study provides new insight into the broad idea that Ub/Ubl modification is a post-translational process that can directly and reversibly regulate the activity of metabolic enzymes. In particular, we show that Ub/Ubl linkages on the active site residues of an enzyme (MPT synthase) can inhibit its catalytic activity and that the enzyme can be reactivated through cleavage by a JAMM/MPN+ metalloprotease.
- Research Organization:
- University of Florida, Gainesville, FL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); National Institutes of Health (NIH)
- Grant/Contract Number:
- FG02-05ER15650
- OSTI ID:
- 1904666
- Journal Information:
- PLoS ONE, Journal Name: PLoS ONE Journal Issue: 5 Vol. 10; ISSN 1932-6203
- Publisher:
- Public Library of ScienceCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Erratum for Fu et al., Ubiquitin-Like Proteasome System Represents a Eukaryotic-Like Pathway for Targeted Proteolysis in Archaea
|
journal | September 2016 |
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