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Berthelot K, Estevez Y, Quiliano M, Baldera-Aguayo PA, Zimic M, Pribat A, Bakleh ME, Teyssier E, Gallusci P, Gardrat C, Lecomte S, Peruch F. HbIDI, SlIDI and EcIDI: A comparative study of isopentenyl diphosphate isomerase activity and structure. Biochimie 2016; 127:133-43. [PMID: 27163845 DOI: 10.1016/j.biochi.2016.05.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
Abstract
In this study, we cloned, expressed and purified the isopentenyl diphosphate isomerases (IDIs) from two plants, Hevea brasiliensis and Solanum lycopersicum, and compared them to the already well characterized Escherichia coli IDI. Phylogenetic analysis showed high homology between the three enzymes. Their catalytic activity was investigated in vitro with recombinant purified enzymes and in vivo by complementation colorimetric tests. The three enzymes displayed consistent activities both in vitro and in vivo. In term of structure, studied by ATR-FTIR and molecular modeling, it is clear that both plant enzymes are more related to their human homologue than to E. coli IDI. But it is assumed that EcIDI represent the minimalistic part of the catalytic core, as both plant enzymes present a supplementary sequence forming an extra α-helice surrounding the catalytic site that could facilitate the biocatalysis. New potential biotechnological applications may be envisaged.
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Affiliation(s)
- Karine Berthelot
- CNRS, LCPO, UMR 5629, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France; CNRS, CBMN, UMR 5248, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France.
| | - Yannick Estevez
- CNRS, LCPO, UMR 5629, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France
| | - Miguel Quiliano
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia y Nutrición, Universidad de Navarra, C/. Irunlarrea 1, 31008, Pamplona, Navarra, Spain
| | - Pedro A Baldera-Aguayo
- Department of Systems Biology and Integrated Program in Cellular, Molecular and Biomedical Studies, Columbia University in the City of New York, NY, 10032, USA; Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, 31, Peru
| | - Mirko Zimic
- Laboratorio de Bioinformática y Biología Molecular, Laboratorios de Investigación y Desarrollo, Facultad de Ciencias y Filosofía, Universidad Peruana Cayetano Heredia, San Martin de Porres, Lima, 31, Peru
| | - Anne Pribat
- INRA Bordeaux-Aquitaine, UMR 1332 Biologie du Fruit et Pathologie, F-33882, Villenave d'Ornon, France
| | - Marc-Elias Bakleh
- CNRS, LCPO, UMR 5629, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France
| | - Emeline Teyssier
- Univ. Bordeaux, Grape Ecophysiology and Functional Biology Laboratory, ISVV, F-33882, Villenave d'Ornon, France
| | - Philippe Gallusci
- Univ. Bordeaux, Grape Ecophysiology and Functional Biology Laboratory, ISVV, F-33882, Villenave d'Ornon, France
| | - Christian Gardrat
- CNRS, LCPO, UMR 5629, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France
| | - Sophie Lecomte
- CNRS, CBMN, UMR 5248, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France
| | - Frédéric Peruch
- CNRS, LCPO, UMR 5629, Univ. Bordeaux, Bordeaux INP, F-33600, Pessac, France.
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Sen SE, Sperry AE. Partial purification of a farnesyl diphosphate synthase from whole-body Manduca sexta. INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2002; 32:889-899. [PMID: 12110296 DOI: 10.1016/s0965-1748(01)00178-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Farnesyl diphosphate synthase (FPP synthase) is a ubiquitous enzyme that is required for the biosynthesis of sesquiterpenes, dolichols ubiquinones, and prenylated proteins in insects. We report on the partial purification and characterization of an FPP synthase, obtained from whole-body preparations of the lepidopteran insect, Manduca sexta. The larval enzyme was separated from isopentenyl diphosphate (IPP) isomerase, phosphatase, and GGPP synthase by preparative isoelectric focusing, and was further purified by DEAE Sepharose, hydroxyapatite, and size exclusion chromatography. Whole-body M. sexta FPP synthase has a native molecular weight of 60.5+/-3.5 kDa and consists of two subunits of 28.5+/-0.5 kDa. As seen with other prenyltransferases, the enzyme has an absolute requirement for divalent cation and both Mn(2+) and Mg(2+) stimulated activity, although the former was inhibitory at higher concentrations. Insect FPP synthase catalyzes the condensation of IPP (K(m)=2.9+/-1.2 microM) with both dimethylallyl diphosphate and geranyl diphosphate (K(m)=0.8+/-0.4 microM). The enzyme requires the presence of detergent, glycerol, and non-specific protein-protein interactions for stability and maximum catalytic activity.
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Affiliation(s)
- Stephanie E Sen
- Department of Chemistry, Indiana University--Purdue University at Indianapolis, 402 North Blackford Street, Indianapolis, IN 46202, USA.
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Tansey TR, Shechter I. Squalene synthase: structure and regulation. PROGRESS IN NUCLEIC ACID RESEARCH AND MOLECULAR BIOLOGY 2000; 65:157-95. [PMID: 11008488 DOI: 10.1016/s0079-6603(00)65005-5] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Squalene synthase (SQS) catalyzes the first reaction of the branch of the isoprenoid metabolic pathway committed specifically to sterol biosynthesis. Regulation of SQS is thought to direct proximal intermediates in the pathway into either sterol or nonsterol branches in response to changing cellular requirements. The importance of SQS in cholesterol metabolism has stimulated research on the mechanism, structure, and regulation of the enzyme. SQS produces squalene, a C30 isoprenoid, in a two-step reaction in which two molecules of farnesyl diphosphate are condensed head to head. Site-directed mutagenesis of rat SQS has identified conserved Tyr, Phe, and Asp residues that are essential for function. The aromatic rings of Tyr and Phe are postulated to stabilize carbocation intermediates of the first and second half-reactions, respectively; the acidic Asp residues may be required for substrate binding. SQS activity, protein level, and gene transcription are strictly and coordinately regulated by cholesterol status, decreasing with cholesterol surfeit and increasing with cholesterol deficit. The human SQS (hSQS) gene has an unusually complex promoter with multiple binding sites for the sterol regulatory element binding proteins SREBP-1a and SREBP-2, and for accessory transcription factors known to be involved in the control of other sterol-responsive genes. SREBP-1a and SREBP-2 require different subsets of hSQS regulatory DNA elements to achieve maximal promoter activation. Current research is directed at elucidating the precise contribution made by individual SREBPs and accessory transcription factors to hSQS transcriptional control.
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Affiliation(s)
- T R Tansey
- Department of Biochemistry and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20814, USA
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Ershov Y, Gantt RR, Cunningham FX, Gantt E. Isopentenyl diphosphate isomerase deficiency in Synechocystis sp. strain PCC6803. FEBS Lett 2000; 473:337-40. [PMID: 10818236 DOI: 10.1016/s0014-5793(00)01516-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Isopentenyl diphosphate isomerase (IPP isomerase) in many organisms and in plastids is central to isoprenoid synthesis and involves the conversion between IPP and dimethylallyl diphosphate (DMAPP). It is shown that Synechocystis PCC6803 is deficient in IPP isomerase activity, consistent with the absence in its genome of an obvious homologue for the enzyme. Incorporation of [1-(14)C]IPP in cell extracts, primarily into C(20), occurs only upon priming with DMAPP in Synechocystis PCC6803 and in Synechococcus PCC7942. Isoprenoid synthesis in these cyanobacteria does not appear to involve interconversion of IPP and DMAPP, raising the possibility that they are not within the plastid evolutionary lineage.
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Affiliation(s)
- Y Ershov
- Department of Cell Biology and Molecular Genetics, University of Maryland, 20742, College Park, MD 20742, USA
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Biggs DR, Welle R, Grisebach H. Intracellular localization of prenyltransferases of isoflavonoid phytoalexin biosynthesis in bean and soybean. PLANTA 1990; 181:244-248. [PMID: 24196744 DOI: 10.1007/bf02411546] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/1989] [Accepted: 12/07/1989] [Indexed: 06/02/2023]
Abstract
The intracellular localization of prenyltransferases involved in the biosynthesis of the phytoalexins glyceollin in soybean (Glycine max L.) and phaseollin in French bean (Phaseolus vulgaris L.) has been investigated. By sucrose- and Percoll-gradient centrifugation of microsomes of an elicitor-challenged soybean cell culture, the membranes containing prenyltransferase were separated from the endoplasmic reticulum and shown to be lighter in density. In a continuous Percoll gradient the peak of prenyltransferase activity coincided with the peak of galactolipid synthesis, as determined by incorporation of uridine 5'-diphospho-[(14)C]galactose (UDP-[(14)C]galactose). Intact chloroplasts isolated from cupricchloride-treated bean leaves contained both prenyltransferase and UDP-galactose transferase activity. Both activities increased during chloroplast isolation. Fractionation of swollen chloroplasts on a discontinuous sucrose gradient showed prenyltransferase and UDP-galactose transferase activity in the envelope membrane subfraction. It is concluded that in both plants prenyltransferase is located in the envelope membrane of plastids.
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Affiliation(s)
- D R Biggs
- Lehrstuhl für Biochemie der Pflanzen, Institut für Biologie II der Albert Ludwigs-Universität, Schänzlestrasse 1, D-7800, Freiburg, Germany
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