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          Institute: MPI für Entwicklungsbiologie     Collection: Abteilung 1 - Protein Evolution (A. Lupas)     Display Documents



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ID: 695263.0, MPI für Entwicklungsbiologie / Abteilung 1 - Protein Evolution (A. Lupas)
The first prokaryotic trehalose synthase complex identified in the hyperthermophilic crenarchaeon Thermoproteus tenax
Authors:Zaparty, M.; Hagemann, A.; Brasen, C.; Hensel, R.; Lupas, A. N.; Brinkmann, H.; Siebers, B.
Language:English
Date of Publication (YYYY-MM-DD):2013-04-23
Title of Journal:PLoS ONE
Journal Abbrev.:PLoS One
Volume:8
Issue / Number:4
Start Page:e61354
End Page:e61354
Sequence Number of Article:23626675
Review Status:Internal review
Audience:Experts Only
Abstract / Description:The role of the disaccharide trehalose, its biosynthesis pathways and their regulation in Archaea are still ambiguous. In Thermoproteus tenax a fused trehalose-6-phosphate synthase/phosphatase (TPSP), consisting of an N-terminal trehalose-6-phosphate synthase (TPS) and a C-terminal trehalose-6-phosphate phosphatase (TPP) domain, was identified. The tpsp gene is organized in an operon with a putative glycosyltransferase (GT) and a putative mechanosensitive channel (MSC). The T. tenax TPSP exhibits high phosphatase activity, but requires activation by the co-expressed GT for bifunctional synthase-phosphatase activity. The GT mediated activation of TPS activity relies on the fusion of both, TPS and TPP domain, in the TPSP enzyme. Activation is mediated by complex-formation in vivo as indicated by yeast two-hybrid and crude extract analysis. In combination with first evidence for MSC activity the results suggest a sophisticated stress response involving TPSP, GT and MSC in T. tenax and probably in other Thermoproteales species. The monophyletic prokaryotic TPSP proteins likely originated via a single fusion event in the Bacteroidetes with subsequent horizontal gene transfers to other Bacteria and Archaea. Furthermore, evidence for the origin of eukaryotic TPSP fusions via HGT from prokaryotes and therefore a monophyletic origin of eukaryotic and prokaryotic fused TPSPs is presented. This is the first report of a prokaryotic, archaeal trehalose synthase complex exhibiting a much more simple composition than the eukaryotic complex described in yeast. Thus, complex formation and a complex-associated regulatory potential might represent a more general feature of trehalose synthesizing proteins.
Free Keywords:Archaeal Proteins/*genetics/metabolism; Base Sequence; Enzyme Activation; Escherichia coli/genetics/metabolism; Evolution, Molecular; *Gene Expression Regulation, Archaeal; Gene Transfer, Horizontal; Glucosyltransferases/*genetics/metabolism; Hot Temperature; Molecular Sequence Data; Operon; Phosphoric Monoester Hydrolases/*genetics/metabolism; Phylogeny; Protein Structure, Tertiary; Recombinant Proteins/genetics/metabolism; Thermoproteus/chemistry/enzymology/*genetics; Two-Hybrid System Techniques
External Publication Status:published
Document Type:Article
Version Comment:Automatic journal name synchronization
Affiliations:MPI für Entwicklungsbiologie/Abteilung 1 - Proteinevolution (Andrei Lupas)
Identifiers:ISSN:1932-6203 (Electronic) 1932-6203 (Linking) %R 10.1... [ID No:1]
URL:http://www.ncbi.nlm.nih.gov/pubmed/23626675 [ID No:2]
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