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Ren Y, Eronen V, Blomster Andberg M, Koivula A, Hakulinen N. Structure and function of aldopentose catabolism enzymes involved in oxidative non-phosphorylative pathways. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2022; 15:147. [PMID: 36578086 PMCID: PMC9795676 DOI: 10.1186/s13068-022-02252-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 12/19/2022] [Indexed: 12/29/2022]
Abstract
Platform chemicals and polymer precursors can be produced via enzymatic pathways starting from lignocellulosic waste materials. The hemicellulose fraction of lignocellulose contains aldopentose sugars, such as D-xylose and L-arabinose, which can be enzymatically converted into various biobased products by microbial non-phosphorylated oxidative pathways. The Weimberg and Dahms pathways convert pentose sugars into α-ketoglutarate, or pyruvate and glycolaldehyde, respectively, which then serve as precursors for further conversion into a wide range of industrial products. In this review, we summarize the known three-dimensional structures of the enzymes involved in oxidative non-phosphorylative pathways of pentose catabolism. Key structural features and reaction mechanisms of a diverse set of enzymes responsible for the catalytic steps in the reactions are analysed and discussed.
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Affiliation(s)
- Yaxin Ren
- grid.9668.10000 0001 0726 2490Department of Chemistry, University of Eastern Finland, 111, 80101 Joensuu, Finland
| | - Veikko Eronen
- grid.9668.10000 0001 0726 2490Department of Chemistry, University of Eastern Finland, 111, 80101 Joensuu, Finland
| | | | - Anu Koivula
- grid.6324.30000 0004 0400 1852VTT Technical Research Centre of Finland Ltd, Espoo, Finland
| | - Nina Hakulinen
- grid.9668.10000 0001 0726 2490Department of Chemistry, University of Eastern Finland, 111, 80101 Joensuu, Finland
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Physiological, Biochemical, and Structural Bioinformatic Analysis of the Multiple Inositol Dehydrogenases from Corynebacterium glutamicum. Microbiol Spectr 2022; 10:e0195022. [PMID: 36094194 PMCID: PMC9603128 DOI: 10.1128/spectrum.01950-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Inositols (cyclohexanehexols) comprise nine isomeric cyclic sugar alcohols, several of which occur in all domains of life with various functions. Many bacteria can utilize inositols as carbon and energy sources via a specific pathway involving inositol dehydrogenases (IDHs) as the first step of catabolism. The microbial cell factory Corynebacterium glutamicum can grow with myo-inositol as a sole carbon source. Interestingly, this species encodes seven potential IDHs, raising the question of the reason for this multiplicity. We therefore investigated the seven IDHs to determine their function, activity, and selectivity toward the biologically most important isomers myo-, scyllo-, and d-chiro-inositol. We created an ΔIDH strain lacking all seven IDH genes, which could not grow on the three inositols. scyllo- and d-chiro-inositol were identified as novel growth substrates of C. glutamicum. Complementation experiments showed that only four of the seven IDHs (IolG, OxiB, OxiD, and OxiE) enabled growth of the ΔIDH strain on two of the three inositols. The kinetics of the four purified enzymes agreed with the complementation results. IolG and OxiD are NAD+-dependent IDHs accepting myo- and d-chiro-inositol but not scyllo-inositol. OxiB is an NAD+-dependent myo-IDH with a weak activity also for scyllo-inositol but not for d-chiro-inositol. OxiE on the other hand is an NAD+-dependent scyllo-IDH showing also good activity for myo-inositol and a very weak activity for d-chiro-inositol. Structural models, molecular docking experiments, and sequence alignments enabled the identification of the substrate binding sites of the active IDHs and of residues allowing predictions on the substrate specificity. IMPORTANCE myo-, scyllo-, and d-chiro-inositol are C6 cyclic sugar alcohols with various biological functions, which also serve as carbon sources for microbes. Inositol catabolism starts with an oxidation to keto-inositols catalyzed by inositol dehydrogenases (IDHs). The soil bacterium C. glutamicum encodes seven potential IDHs. Using a combination of microbiological, biochemical, and modeling approaches, we analyzed the function of these enzymes and identified four IDHs involved in the catabolism of inositols. They possess distinct substrate preferences for the three isomers, and modeling and sequence alignments allowed the identification of residues important for substrate specificity. Our results expand the knowledge of bacterial inositol metabolism and provide an important basis for the rational development of producer strains for these valuable inositols, which show pharmacological activities against, e.g., Alzheimer's disease, polycystic ovarian syndrome, or type II diabetes.
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Assessment of the Effects of Triticonazole on Soil and Human Health. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196554. [PMID: 36235091 PMCID: PMC9572687 DOI: 10.3390/molecules27196554] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/19/2022] [Accepted: 09/26/2022] [Indexed: 11/28/2022]
Abstract
Triticonazole is a fungicide used to control diseases in numerous plants. The commercial product is a racemate containing (R)- and (S)-triticonazole and its residues have been found in vegetables, fruits, and drinking water. This study considered the effects of triticonazole on soil microorganisms and enzymes and human health by taking into account the enantiomeric structure when applicable. An experimental method was applied for assessing the effects of triticonazole on soil microorganisms and enzymes, and the effects of the stereoisomers on soil enzymes and human health were assessed using a computational approach. There were decreases in dehydrogenase and phosphatase activities and an increase in urease activity when barley and wheat seeds treated with various doses of triticonazole were sown in chernozem soil. At least 21 days were necessary for the enzymes to recover the activities. This was consistent with the diminution of the total number of soil microorganisms in the 14 days after sowing. Both stereoisomers were able to bind to human plasma proteins and were potentially inhibitors of human cytochromes, revealing cardiotoxicity and low endocrine disruption potential. As distinct effects, (R)-TTZ caused skin sensitization, carcinogenicity, and respiratory toxicity. There were no significant differences in the interaction energies of the stereoisomers and soil enzymes, but (S)-TTZ exposed higher interaction energies with plasma proteins and human cytochromes.
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Verner Z, Žárský V, Le T, Narayanasamy RK, Rada P, Rozbeský D, Makki A, Belišová D, Hrdý I, Vancová M, Lender C, König C, Bruchhaus I, Tachezy J. Anaerobic peroxisomes in Entamoeba histolytica metabolize myo-inositol. PLoS Pathog 2021; 17:e1010041. [PMID: 34780573 PMCID: PMC8629394 DOI: 10.1371/journal.ppat.1010041] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Revised: 11/29/2021] [Accepted: 10/18/2021] [Indexed: 11/19/2022] Open
Abstract
Entamoeba histolytica is believed to be devoid of peroxisomes, like most anaerobic protists. In this work, we provided the first evidence that peroxisomes are present in E. histolytica, although only seven proteins responsible for peroxisome biogenesis (peroxins) were identified (Pex1, Pex6, Pex5, Pex11, Pex14, Pex16, and Pex19). Targeting matrix proteins to peroxisomes is reduced to the PTS1-dependent pathway mediated via the soluble Pex5 receptor, while the PTS2 receptor Pex7 is absent. Immunofluorescence microscopy showed that peroxisomal markers (Pex5, Pex14, Pex16, Pex19) are present in vesicles distinct from mitosomes, the endoplasmic reticulum, and the endosome/phagosome system, except Pex11, which has dual localization in peroxisomes and mitosomes. Immunoelectron microscopy revealed that Pex14 localized to vesicles of approximately 90-100 nm in diameter. Proteomic analyses of affinity-purified peroxisomes and in silico PTS1 predictions provided datasets of 655 and 56 peroxisomal candidates, respectively; however, only six proteins were shared by both datasets, including myo-inositol dehydrogenase (myo-IDH). Peroxisomal NAD-dependent myo-IDH appeared to be a dimeric enzyme with high affinity to myo-inositol (Km 0.044 mM) and can utilize also scyllo-inositol, D-glucose and D-xylose as substrates. Phylogenetic analyses revealed that orthologs of myo-IDH with PTS1 are present in E. dispar, E. nutalli and E. moshkovskii but not in E. invadens, and form a monophyletic clade of mostly peroxisomal orthologs with free-living Mastigamoeba balamuthi and Pelomyxa schiedti. The presence of peroxisomes in E. histolytica and other archamoebae breaks the paradigm of peroxisome absence in anaerobes and provides a new potential target for the development of antiparasitic drugs.
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Affiliation(s)
- Zdeněk Verner
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Vojtěch Žárský
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Tien Le
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Ravi Kumar Narayanasamy
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Petr Rada
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Daniel Rozbeský
- Department of Cell Biology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Abhijith Makki
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Darja Belišová
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Ivan Hrdý
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
| | - Marie Vancová
- Biology Centre, Czech Academy of Sciences, Institute of Parasitology, Ceske Budejovice, Czech Republic
| | - Corinna Lender
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Constantin König
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Iris Bruchhaus
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Jan Tachezy
- Department of Parasitology, Faculty of Science, Charles University, BIOCEV, Vestec, Czech Republic
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Liou CS, Sirk SJ, Diaz CAC, Klein AP, Fischer CR, Higginbottom SK, Erez A, Donia MS, Sonnenburg JL, Sattely ES. A Metabolic Pathway for Activation of Dietary Glucosinolates by a Human Gut Symbiont. Cell 2020; 180:717-728.e19. [PMID: 32084341 DOI: 10.1016/j.cell.2020.01.023] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 11/04/2019] [Accepted: 01/15/2020] [Indexed: 02/07/2023]
Abstract
Consumption of glucosinolates, pro-drug-like metabolites abundant in Brassica vegetables, has been associated with decreased risk of certain cancers. Gut microbiota have the ability to metabolize glucosinolates, generating chemopreventive isothiocyanates. Here, we identify a genetic and biochemical basis for activation of glucosinolates to isothiocyanates by Bacteroides thetaiotaomicron, a prominent gut commensal species. Using a genome-wide transposon insertion screen, we identified an operon required for glucosinolate metabolism in B. thetaiotaomicron. Expression of BT2159-BT2156 in a non-metabolizing relative, Bacteroides fragilis, resulted in gain of glucosinolate metabolism. We show that isothiocyanate formation requires the action of BT2158 and either BT2156 or BT2157 in vitro. Monocolonization of mice with mutant BtΔ2157 showed reduced isothiocyanate production in the gastrointestinal tract. These data provide insight into the mechanisms by which a common gut bacterium processes an important dietary nutrient.
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Affiliation(s)
- Catherine S Liou
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Shannon J Sirk
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Camil A C Diaz
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Andrew P Klein
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
| | - Curt R Fischer
- Chemistry, Engineering, and Medicine for Human Health, Stanford University, Stanford, CA 94305, USA
| | - Steven K Higginbottom
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Amir Erez
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Mohamed S Donia
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
| | - Justin L Sonnenburg
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Elizabeth S Sattely
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA; Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.
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Suzuki M, Koubara K, Takenoya M, Fukano K, Ito S, Sasaki Y, Nakamura A, Yajima S. Single amino acid mutation altered substrate specificity for L-glucose and inositol in scyllo-inositol dehydrogenase isolated from Paracoccus laeviglucosivorans. Biosci Biotechnol Biochem 2019; 84:734-742. [PMID: 31842701 DOI: 10.1080/09168451.2019.1702870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
scyllo-inositol dehydrogenase, isolated from Paracoccus laeviglucosivorans (Pl-sIDH), exhibits a broad substrate specificity: it oxidizes scyllo- and myo-inositols as well as L-glucose, converting L-glucose to L-glucono-1,5-lactone. Based on the crystal structures previously reported, Arg178 residue, located at the entry port of the catalytic site, seemed to be important for accepting substrates. Here, we report the role of Arg178 by using an alanine-substituted mutant for kinetic analysis as well as to determine the crystal structures. The wild-type Pl-sIDH exhibits the activity for scyllo-inositol most preferably followed by myo-inositol and L-glucose. On the contrary, the R178A mutant abolished the activities for both inositols, but remained active for L-glucose to the same extent as its wild-type. Based on the crystal structures of the mutant, the side chain of Asp191 flipped out of the substrate binding site. Therefore, Arg178 is important in positioning Asp191 correctly to exert its catalytic activities.Abbreviations: IDH: inositol dehydrogenase; LB: Luria-Bertani; kcat: catalyst rate constant; Km: Michaelis constant; NAD: nicotinamide dinucleotide; NADH: nicotinamide dinucleotide reduced form; PDB; Protein Data Bank; PDB entry: 6KTJ, 6KTK, 6KTL.
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Affiliation(s)
- Mayu Suzuki
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Kairi Koubara
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Mihoko Takenoya
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Kazuhiro Fukano
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Shinsaku Ito
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Yasuyuki Sasaki
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan.,Microbiology Research Center for Sustainability (MiCS), University of Tsukuba, Ibaraki, Japan
| | - Shunsuke Yajima
- Department of Bioscience, Tokyo University of Agriculture, Tokyo, Japan
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Geddes BA, Paramasivan P, Joffrin A, Thompson AL, Christensen K, Jorrin B, Brett P, Conway SJ, Oldroyd GED, Poole PS. Engineering transkingdom signalling in plants to control gene expression in rhizosphere bacteria. Nat Commun 2019; 10:3430. [PMID: 31366919 PMCID: PMC6668481 DOI: 10.1038/s41467-019-10882-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 06/07/2019] [Indexed: 01/10/2023] Open
Abstract
The root microbiota is critical for agricultural yield, with growth-promoting bacteria able to solubilise phosphate, produce plant growth hormones, antagonise pathogens and fix N2. Plants control the microorganisms in their immediate environment and this is at least in part through direct selection, the immune system, and interactions with other microorganisms. Considering the importance of the root microbiota for crop yields it is attractive to artificially regulate this environment to optimise agricultural productivity. Towards this aim we express a synthetic pathway for the production of the rhizopine scyllo-inosamine in plants. We demonstrate the production of this bacterial derived signal in both Medicago truncatula and barley and show its perception by rhizosphere bacteria, containing bioluminescent and fluorescent biosensors. This study lays the groundwork for synthetic signalling networks between plants and bacteria, allowing the targeted regulation of bacterial gene expression in the rhizosphere for delivery of useful functions to plants. The root microbiota is critical for promoting crop yield. Here, the authors create a synthetic pathway for the production of the rhizopine scyllo-inosamine in Medicago truncatula and barley, and show its perception by rhizosphere bacteria for targeted regulation of bacterial gene expression.
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Affiliation(s)
- Barney A Geddes
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Ponraj Paramasivan
- Sainsbury Laboratory, University of Cambridge, Bateman Street, Cambridge, CB2 1LR, UK
| | - Amelie Joffrin
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Amber L Thompson
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Kirsten Christensen
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Beatriz Jorrin
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
| | - Paul Brett
- Department of Metabolic Biology, John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK
| | - Stuart J Conway
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Giles E D Oldroyd
- Sainsbury Laboratory, University of Cambridge, Bateman Street, Cambridge, CB2 1LR, UK
| | - Philip S Poole
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK.
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de Araújo NC, Bury PDS, Tavares MT, Huang F, Parise-Filho R, Leadlay P, Dias MVB. Crystal Structure of GenD2, an NAD-Dependent Oxidoreductase Involved in the Biosynthesis of Gentamicin. ACS Chem Biol 2019; 14:925-933. [PMID: 30995396 DOI: 10.1021/acschembio.9b00115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gentamicins are clinically relevant aminoglycoside antibiotics produced by several Micromonospora species. Gentamicins are highly methylated and functionalized molecules, and their biosynthesis include glycosyltransferases, dehydratase/oxidoreductases, aminotransferases, and methyltransferases. The biosynthesis of gentamicin A from gentamicin A2 involves three enzymatic steps that modify the hydroxyl group at position 3″ of the unusual garosamine sugar to provide its substitution for an amino group, followed by an N-methylation. The first of these reactions is catalyzed by GenD2, an oxidoreductase from the Gfo/Idh/MocA protein family, which reduces the hydroxyl at the C3″ of gentamicin A to produce 3''-dehydro-3''-oxo-gentamicin A2 (DOA2). In this work, we solved the structure of GenD2 in complex with NAD+. Although the structure of GenD2 has a similar fold to other members of the Gfo/Idh/MocA family, this enzyme has several new features, including a 3D-domain swapping of two β-strands that are involved in a novel oligomerization interface for this protein family. In addition, the active site of this enzyme also has several specialties which are possibly involved in the substrate specificity, including a number of aromatic residues and a negatively charged region, which is complementary to the polycationic aminoglycoside-substrate. Therefore, docking simulations provided insights into the recognition of gentamicin A2 and into the catalytic mechanism of GenD2. This is the first report describing the structure of an oxidoreductase involved in aminoglycoside biosynthesis and could open perspectives into producing new aminoglycoside derivatives by protein engineering.
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Affiliation(s)
- Natalia Cerrone de Araújo
- Department of Microbiology, Institute of Biomedical Science , University of São Paulo , Avenida Prof. Lineu Prestes 1374 , 05508-900 São Paulo , Brazil
| | - Priscila Dos Santos Bury
- Department of Microbiology, Institute of Biomedical Science , University of São Paulo , Avenida Prof. Lineu Prestes 1374 , 05508-900 São Paulo , Brazil
| | - Maurício Temotheo Tavares
- Department of Pharmacy, Faculty of Pharmaceutical Sciences , University of São Paulo , Prof. Lineu Prestes Avenue 580 , 05508-900 São Paulo , Brazil
| | - Fanglu Huang
- Department of Biochemistry , University of Cambridge , 80 Tennis Court Road , Cambridge CB2 1GA , U.K
| | - Roberto Parise-Filho
- Department of Pharmacy, Faculty of Pharmaceutical Sciences , University of São Paulo , Prof. Lineu Prestes Avenue 580 , 05508-900 São Paulo , Brazil
| | - Peter Leadlay
- Department of Biochemistry , University of Cambridge , 80 Tennis Court Road , Cambridge CB2 1GA , U.K
| | - Marcio Vinicius Bertacine Dias
- Department of Microbiology, Institute of Biomedical Science , University of São Paulo , Avenida Prof. Lineu Prestes 1374 , 05508-900 São Paulo , Brazil.,Department of Chemistry , University of Warwick , Coventry CV4 7AL , U.K
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9
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Pinto C, Sousa S, Froufe H, Egas C, Clément C, Fontaine F, Gomes AC. Draft genome sequence of Bacillus amyloliquefaciens subsp. plantarum strain Fito_F321, an endophyte microorganism from Vitis vinifera with biocontrol potential. Stand Genomic Sci 2018; 13:30. [PMID: 30410642 PMCID: PMC6211603 DOI: 10.1186/s40793-018-0327-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 09/24/2018] [Indexed: 11/10/2022] Open
Abstract
Bacillus amyloliquefaciens subsp. plantarum strain Fito_F321 is a naturally occurring strain in vineyard, with the ability to colonise grapevine and which unveils a naturally antagonistic potential against phytopathogens of grapevine, including those responsible for the Botryosphaeria dieback, a GTD disease. Herein we report the draft genome sequence of B. amyloliquefaciens subsp. plantarum Fito_F321, isolated from the leaf of Vitis vinifera cv. Merlot at Bairrada appellation (Cantanhede, Portugal). The genome size is 3,856,229 bp, with a GC content of 46.54% that contains 3697 protein-coding genes, 86 tRNA coding genes and 5 rRNA genes. The draft genome of strain Fito_F321 allowed to predict a set of bioactive compounds as bacillaene, difficidin, macrolactin, surfactin and fengycin that due to their antimicrobial activity are hypothesized to be of utmost importance for biocontrol of grapevine diseases.
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Affiliation(s)
- Cátia Pinto
- Biocant - Biotechnology Innovation Center, Cantanhede, Portugal
- SFR Condorcet - FR CNRS 3417, University of Reims Champagne-Ardenne, Induced Resistance and Plant Bioprotection (RIBP)- EA 4707, BP1039, Cedex 2 51687 Reims, France
| | - Susana Sousa
- Biocant - Biotechnology Innovation Center, Cantanhede, Portugal
| | - Hugo Froufe
- Biocant - Biotechnology Innovation Center, Cantanhede, Portugal
| | - Conceição Egas
- Biocant - Biotechnology Innovation Center, Cantanhede, Portugal
- Center for Neurosciences and Cell Biology (CNC), Faculty of Medicine, University of Coimbra, Polo I, 1st floor, Rua Larga, 3004-504 Coimbra, Portugal
| | - Christophe Clément
- SFR Condorcet - FR CNRS 3417, University of Reims Champagne-Ardenne, Induced Resistance and Plant Bioprotection (RIBP)- EA 4707, BP1039, Cedex 2 51687 Reims, France
| | - Florence Fontaine
- SFR Condorcet - FR CNRS 3417, University of Reims Champagne-Ardenne, Induced Resistance and Plant Bioprotection (RIBP)- EA 4707, BP1039, Cedex 2 51687 Reims, France
| | - Ana C Gomes
- Biocant - Biotechnology Innovation Center, Cantanhede, Portugal
- Center for Neurosciences and Cell Biology (CNC), Faculty of Medicine, University of Coimbra, Polo I, 1st floor, Rua Larga, 3004-504 Coimbra, Portugal
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10
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Aamudalapalli HB, Bertwistle D, Palmer DRJ, Sanders DAR. myo-Inositol dehydrogenase and scyllo-inositol dehydrogenase from Lactobacillus casei BL23 bind their substrates in very different orientations. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2018; 1866:1115-1124. [PMID: 30282609 DOI: 10.1016/j.bbapap.2018.08.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 10/28/2022]
Abstract
Many bacteria can use myo-inositol as the sole carbon source using enzymes encoded in the iol operon. The first step is catalyzed by the well-characterized myo-inositol dehydrogenase (mIDH), which oxidizes the axial hydroxyl group of the substrate to form scyllo-inosose. Some bacteria, including Lactobacillus casei, contain more than one apparent mIDH-encoding gene in the iol operon, but such redundant enzymes have not been investigated. scyllo-Inositol, a stereoisomer of myo-inositol, is not a substrate for mIDH, but scyllo-inositol dehydrogenase (sIDH) enzymes have been reported, though never observed to be encoded within the iol operon. Sequences indicate these enzymes are related, but the structural basis by which they distinguish their substrates has not been determined. Here we report the substrate selectivity, kinetics, and high-resolution crystal structures of the proteins encoded by iolG1 and iolG2 from L. casei BL23, which we show encode a mIDH and sIDH, respectively. Comparison of the ternary complex of each enzyme with its preferred substrate reveals the key variations allowing for oxidation of an equatorial versus an axial hydroxyl group. Despite the overall similarity of the active site residues, scyllo-inositol is bound in an inverted, tilted orientation by sIDH relative to the orientation of myo-inositol by mIDH.
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Affiliation(s)
| | - Drew Bertwistle
- Department of Physics and Engineering Physics, University of Saskatchewan, Canada; Canadian Light Source, University of Saskatchewan, Canada
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11
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Fukano K, Ozawa K, Kokubu M, Shimizu T, Ito S, Sasaki Y, Nakamura A, Yajima S. Structural basis of L-glucose oxidation by scyllo-inositol dehydrogenase: Implications for a novel enzyme subfamily classification. PLoS One 2018; 13:e0198010. [PMID: 29799855 PMCID: PMC5969746 DOI: 10.1371/journal.pone.0198010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 05/12/2018] [Indexed: 11/21/2022] Open
Abstract
For about 70 years, L-glucose had been considered non-metabolizable by either mammalian or bacterial cells. Recently, however, an L-glucose catabolic pathway has been discovered in Paracoccus laeviglucosivorans, and the genes responsible cloned. Scyllo-inositol dehydrogenase is involved in the first step in the pathway that oxidizes L-glucose to produce L-glucono-1,5-lactone with concomitant reduction of NAD+ dependent manner. Here, we report the crystal structure of the ternary complex of scyllo-inositol dehydrogenase with NAD+ and L-glucono-1,5-lactone at 1.8 Å resolution. The enzyme adopts a homo-tetrameric structure, similar to those of the inositol dehydrogenase family, and the electron densities of the bound sugar was clearly observed, allowing identification of the residues responsible for interaction with the substrate in the catalytic site. In addition to the conserved catalytic residues (Lys106, Asp191, and His195), another residue, His318, located in the loop region of the adjacent subunit, is involved in substrate recognition. Site-directed mutagenesis confirmed the role of these residues in catalytic activity. We also report the complex structures of the enzyme with myo-inositol and scyllo-inosose. The Arg178 residue located in the flexible loop at the entrance of the catalytic site is also involved in substrate recognition, and plays an important role in accepting both L-glucose and inositols as substrates. On the basis of these structural features, which have not been identified in the known inositol dehydrogenases, and a phylogenetic analysis of IDH family enzymes, we suggest a novel subfamily of the GFO/IDH/MocA family. Since many enzymes in this family have not biochemically characterized, our results could promote to find their activities with various substrates.
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Affiliation(s)
- Kazuhiro Fukano
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Kunio Ozawa
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Masaya Kokubu
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Tetsu Shimizu
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan
| | - Shinsaku Ito
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Yasuyuki Sasaki
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
| | - Akira Nakamura
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan
| | - Shunsuke Yajima
- Department of Bioscience, Tokyo University of Agriculture, Setagaya-ku, Tokyo, Japan
- * E-mail:
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12
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Ara S, Yamazaki H, Takaku H. Isolation of 2-deoxy-scyllo-inosose (DOI)-assimilating yeasts and cloning and characterization of the DOI reductase gene of Cryptococcus podzolicus ND1. J Biosci Bioeng 2017; 125:397-406. [PMID: 29183694 DOI: 10.1016/j.jbiosc.2017.10.019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2017] [Revised: 10/29/2017] [Accepted: 10/31/2017] [Indexed: 10/18/2022]
Abstract
2-Deoxy-scyllo-inosose (DOI) is the first intermediate in the 2-deoxystreptamine-containing aminoglycoside antibiotic biosynthesis pathway and has a six-membered carbocycle structure. DOI is a valuable material because it is easily converted to aromatic compounds and carbasugar derivatives. In this study, we isolated yeast strains capable of assimilating DOI as a carbon source. One of the strains, Cryptococcus podzolicus ND1, mainly converted DOI to scyllo-quercitol and (-)-vibo-quercitol, which is a valuable compound used as an antihypoglycemia agent and as a heat storage material. An NADH-dependent DOI reductase coding gene, DOIR, from C. podzolicus ND1 was cloned and successfully overexpressed in Escherichia coli. The purified protein catalyzed the irreversible reduction of DOI with NADH and converted DOI into (-)-vibo-quercitol. The enzyme had an optimal pH of 8.5 and optimal temperature of 35°C, respectively. The kcat of this enzyme was 9.98 s-1, and the Km values for DOI and NADH were 4.38 and 0.24 mM, respectively. The enzyme showed a strong preference for NADH and showed no activity with NADPH. Multiple-alignment analysis of DOI reductase revealed that it belongs to the GFO_IDH_MocA protein family and is an inositol dehydrogenase homolog in other fungi, such as Cryptococcus gattii, and bacteria, such as Bacillus subtilis. This is the first identification of a DOI-assimilating yeast and a gene involved in DOI metabolism in fungi.
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Affiliation(s)
- Satoshi Ara
- Department of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Higashijima 265-1, Niigata 956-8603, Japan
| | - Harutake Yamazaki
- Department of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Higashijima 265-1, Niigata 956-8603, Japan
| | - Hiroaki Takaku
- Department of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Higashijima 265-1, Niigata 956-8603, Japan.
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13
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Fan B, Li YL, Li L, Peng XJ, Bu C, Wu XQ, Borriss R. Malonylome analysis of rhizobacterium Bacillus amyloliquefaciens FZB42 reveals involvement of lysine malonylation in polyketide synthesis and plant-bacteria interactions. J Proteomics 2016; 154:1-12. [PMID: 27939684 DOI: 10.1016/j.jprot.2016.11.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/24/2016] [Accepted: 11/30/2016] [Indexed: 12/21/2022]
Abstract
Using the combination of affinity enrichment and high-resolution LC-MS/MS analysis, we performed a large-scale lysine malonylation analysis in the model representative of Gram-positive plant growth-promoting rhizobacteria (PGPR), Bacillus amyloliquefaciens FZB42. Altogether, 809 malonyllysine sites in 382 proteins were identified. The bioinformatic analysis revealed that lysine malonylation occurs on the proteins involved in a variety of biological functions including central carbon metabolism, fatty acid biosynthesis and metabolism, NAD(P) binding and translation machinery. A group of proteins known to be implicated in rhizobacterium-plant interaction were also malonylated; especially, the enzymes responsible for antibiotic production including polyketide synthases (PKSs) and nonribosomal peptide synthases (NRPSs) were highly malonylated. Furthermore, our analysis showed malonylation occurred on proteins structure with higher surface accessibility and appeared to be conserved in many bacteria but not in archaea. The results provide us valuable insights into the potential roles of lysine malonylation in governing bacterial metabolism and cellular processes. BIOLOGICAL SIGNIFICANCE Although in mammalian cells some important findings have been discovered that protein malonylation is related to basic metabolism and chronic disease, few studies have been performed on prokaryotic malonylome. In this study, we determined the malonylation profiles of Bacillus amyloliquefaciens FZB42, a model organism of Gram-positive plant growth-promoting rhizobacteria. FZB42 is known for the extensive investigations on its strong ability of producing antimicrobial polyketides and its potent activities of stimulating plant growth. Our analysis shows that malonylation is highly related to the polyketide synthases and the proteins involved bacterial interactions with plants. The results not only provide one of the first malonylomes for exploring the biochemical nature of bacterial proteins, but also shed light on the better understanding of bacterial antibiotic biosynthesis and plant-microbe interaction.
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Affiliation(s)
- Ben Fan
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, 210037 Nanjing, China.
| | - Yu-Long Li
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, 210037 Nanjing, China.
| | - Lei Li
- RNA Biology Group, Institute for Molecular Infection Biology, University of Würzburg, 97080 Würzburg, Germany.
| | - Xiao-Jun Peng
- Jingjie PTM Biolabs (Hangzhou) Co. Ltd., Hangzhou 310018, China.
| | - Chen Bu
- Jingjie PTM Biolabs (Hangzhou) Co. Ltd., Hangzhou 310018, China.
| | - Xiao-Qin Wu
- Co-Innovation Center for Sustainable Forestry in Southern China, College of Forestry, Nanjing Forestry University, 210037 Nanjing, China.
| | - Rainer Borriss
- Fachgebiet Phytomedizin, Albrecht Daniel Thaer Institut für Agrar- und Gartenbauwissenschaften, Lebenswissenschaftliche Fakultät, Humboldt Universität zu Berlin, 14195 Berlin, Germany.
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14
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Taberman H, Parkkinen T, Rouvinen J. Structural and functional features of the NAD(P) dependent Gfo/Idh/MocA protein family oxidoreductases. Protein Sci 2016; 25:778-86. [PMID: 26749496 DOI: 10.1002/pro.2877] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Accepted: 01/05/2016] [Indexed: 11/11/2022]
Abstract
The Gfo/Idh/MocA protein family contains a number of different proteins, which almost exclusively consist of NAD(P)-dependent oxidoreductases that have a diverse set of substrates, typically pyranoses. In this study, to clarify common structural features that would contribute to their function, the available crystal structures of the members of this family have been analyzed. Despite a very low sequence identity, the central features of the three-dimensional structures of the proteins are surprisingly similar. The members of the protein family have a two-domain structure consisting of a N-terminal nucleotide-binding domain and a C-terminal α/β-domain. The C-terminal domain contributes to the substrate binding and catalysis, and contains a βα-motif with a central α-helix carrying common essential amino acid residues. The β-sheet of the α/β-domain contributes to the oligomerization in most of the proteins in the family.
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Affiliation(s)
- Helena Taberman
- Department of Chemistry, University of Eastern Finland, PO Box 111, Joensuu, 80101, Finland
| | - Tarja Parkkinen
- Department of Chemistry, University of Eastern Finland, PO Box 111, Joensuu, 80101, Finland
| | - Juha Rouvinen
- Department of Chemistry, University of Eastern Finland, PO Box 111, Joensuu, 80101, Finland
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15
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Bertwistle D, Vogt L, Aamudalapalli HB, Palmer DRJ, Sanders DAR. Purification, crystallization and room-temperature X-ray diffraction of inositol dehydrogenase LcIDH2 from Lactobacillus casei BL23. Acta Crystallogr F Struct Biol Commun 2014; 70:979-83. [PMID: 25005103 PMCID: PMC4089546 DOI: 10.1107/s2053230x14011595] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 05/19/2014] [Indexed: 11/10/2022] Open
Abstract
Lactobacillus casei BL23 contains two genes, iolG1 and iolG2, homologous with inositol dehydrogenase encoding genes from many bacteria. Inositol dehydrogenase catalyzes the oxidation of inositol with concomitant reduction of NAD+. The protein encoded by iolG2, LcIDH2, has been purified to homogeneity, crystallized and cryoprotected for diffraction at 77 K. The crystals had a high mosaicity and poor processing statistics. Subsequent diffraction measurements were performed without cryoprotectant at room temperature. These crystals were radiation-resistant and a full diffraction data set was collected at room temperature to 1.6 Å resolution.
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Affiliation(s)
- Drew Bertwistle
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
- Department of Physics and Engineering Physics, University of Saskatchewan, 116 Science Place, Saskatoon SK S7N 5E2, Canada
| | - Linda Vogt
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - Hari Babu Aamudalapalli
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - David R. J. Palmer
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
| | - David A. R. Sanders
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon SK S7N 5C9, Canada
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16
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Prediction and experimental validation of enzyme substrate specificity in protein structures. Proc Natl Acad Sci U S A 2013; 110:E4195-202. [PMID: 24145433 DOI: 10.1073/pnas.1305162110] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Structural Genomics aims to elucidate protein structures to identify their functions. Unfortunately, the variation of just a few residues can be enough to alter activity or binding specificity and limit the functional resolution of annotations based on sequence and structure; in enzymes, substrates are especially difficult to predict. Here, large-scale controls and direct experiments show that the local similarity of five or six residues selected because they are evolutionarily important and on the protein surface can suffice to identify an enzyme activity and substrate. A motif of five residues predicted that a previously uncharacterized Silicibacter sp. protein was a carboxylesterase for short fatty acyl chains, similar to hormone-sensitive-lipase-like proteins that share less than 20% sequence identity. Assays and directed mutations confirmed this activity and showed that the motif was essential for catalysis and substrate specificity. We conclude that evolutionary and structural information may be combined on a Structural Genomics scale to create motifs of mixed catalytic and noncatalytic residues that identify enzyme activity and substrate specificity.
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17
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Zheng H, Bertwistle D, Sanders DAR, Palmer DRJ. Converting NAD-specific inositol dehydrogenase to an efficient NADP-selective catalyst, with a surprising twist. Biochemistry 2013; 52:5876-83. [PMID: 23952058 DOI: 10.1021/bi400821s] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
myo-Inositol dehydrogenase (IDH, EC 1.1.1.18) from Bacillus subtilis converts myo-inositol to scyllo-inosose and is strictly dependent on NAD for activity. We sought to alter the coenzyme specificity to generate an NADP-dependent enzyme in order to enhance our understanding of coenzyme selectivity and to create an enzyme capable of recycling NADP in biocatalytic processes. Examination of available structural information related to the GFO/MocA/IDH family of dehydrogenases and precedents for altering coenzyme selectivity allowed us to select residues for substitution, and nine single, double, and triple mutants were constructed. Mutagenesis experiments with B. subtilis IDH proved extremely successful; the double mutant D35S/V36R preferred NADP to NAD by a factor of 5. This mutant is an excellent catalyst with a second-order rate constant with respect to NADP of 370 000 s⁻¹ M⁻¹, and the triple mutant A12K/D35S/V36R had a value of 570 000 s⁻¹ M⁻¹, higher than that of the wild-type IDH with NAD. The high-resolution X-ray crystal structure of the double mutant A12K/D35S was solved in complex with NADP. Surprisingly, the binding of the coenzyme is altered such that although the nicotinamide ring maintains the required position for catalysis, the coenzyme has twisted by nearly 90°, so the adenine moiety no longer binds to a hydrophobic cleft in the Rossmann fold as in the wild-type enzyme. This change in binding conformation has not previously been observed in mutated dehydrogenases.
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Affiliation(s)
- Hongyan Zheng
- Department of Chemistry, University of Saskatchewan, 110 Science Place, Saskatoon, Saskatchewan S7N 5C9, Canada
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