1
|
Mueller A, Xu L, Heine C, Flach T, Mäkelä MR, de Vries RP. Genome Mining Reveals a Surprising Number of Sugar Reductases in Aspergillus niger. J Fungi (Basel) 2023; 9:1138. [PMID: 38132739 PMCID: PMC10744612 DOI: 10.3390/jof9121138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 11/21/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
Metabolic engineering of filamentous fungi has received increasing attention in recent years, especially in the context of creating better industrial fungal cell factories to produce a wide range of valuable enzymes and metabolites from plant biomass. Recent studies into the pentose catabolic pathway (PCP) in Aspergillus niger have revealed functional redundancy in most of the pathway steps. In this study, a closer examination of the A. niger genome revealed five additional paralogs for the three original pentose reductases (LarA, XyrA, XyrB). Analysis of these genes using phylogeny, in vitro and in vivo functional analysis of the enzymes, and gene expression revealed that all can functionally replace LarA, XyrA, and XyrB. However, they are also active on several other sugars, suggesting a role for them in other pathways. This study therefore reveals the diversity of primary carbon metabolism in fungi, suggesting an intricate evolutionary process that distinguishes different species. In addition, through this study, the metabolic toolkit for synthetic biology and metabolic engineering of A. niger and other fungal cell factories has been expanded.
Collapse
Affiliation(s)
- Astrid Mueller
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; (A.M.); (L.X.); (C.H.); (T.F.)
| | - Li Xu
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; (A.M.); (L.X.); (C.H.); (T.F.)
| | - Claudia Heine
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; (A.M.); (L.X.); (C.H.); (T.F.)
| | - Tila Flach
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; (A.M.); (L.X.); (C.H.); (T.F.)
| | - Miia R. Mäkelä
- Department of Microbiology, University of Helsinki, Viikinkaari 9, 00014 Helsinki, Finland;
| | - Ronald P. de Vries
- Fungal Physiology, Westerdijk Fungal Biodiversity Institute & Fungal Molecular Physiology, Utrecht University, Uppsalalaan 8, 3584 CT Utrecht, The Netherlands; (A.M.); (L.X.); (C.H.); (T.F.)
| |
Collapse
|
2
|
Wu H, Yi M, Wu X, Ding Y, Pu M, Wen L, Cheng Y, Zhang W, Mu W. Engineering the thermostability of d-lyxose isomerase from Caldanaerobius polysaccharolyticus via multiple computer-aided rational design for efficient synthesis of d-mannose. Synth Syst Biotechnol 2023; 8:323-330. [PMID: 37168606 PMCID: PMC10165151 DOI: 10.1016/j.synbio.2023.04.003] [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] [Received: 03/13/2023] [Revised: 04/16/2023] [Accepted: 04/17/2023] [Indexed: 05/13/2023] Open
Abstract
d-Mannose is an attractive functional sugar that exhibits many physiological benefits on human health. The demand for low-calorie sugars and sweeteners in foods are increasingly available on the market. Some sugar isomerases, such as d-lyxose isomerase (d-LIase), can achieve an isomerization reaction between d-mannose and d-fructose. However, the weak thermostability of d-LIase limits its efficient conversion from d-fructose to d-mannose. Nonetheless, few studies are available that have investigated the molecular modification of d-LIase to improve its thermal stability. In this study, computer-aided tools including FireProt, PROSS, and Consensus Finder were employed to jointly design d-LIase mutants with improved thermostability for the first time. Finally, the obtained five-point mutant M5 (N21G/E78P/V58Y/C119Y/K170P) showed high thermal stability and catalytic activity. The half-life of M5 at 65 °C was 10.22 fold, and the catalytic efficiency towards 600 g/L of d-fructose was 2.6 times to that of the wild type enzyme, respectively. Molecular dynamics simulation and intramolecular forces analysis revealed a thermostability mechanism of highly rigidity conformation, newly formed hydrogen bonds and π-cation interaction between and within protein domains, and redistributed surface electrostatic charges for the mutant M5. This research provided a promising d-LIase mutant for the industrial production of d-mannose from d-fructose.
Collapse
Affiliation(s)
- Hao Wu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Ming Yi
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Xiaoyi Wu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Yating Ding
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Minghui Pu
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Li Wen
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Yunhui Cheng
- School of Food Science and Bioengineering, Changsha University of Science & Technology, Changsha, 410114, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
- Corresponding author. State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| |
Collapse
|
3
|
Wang P, Zheng Y, Li Y, Shen J, Dan M, Wang D. Recent advances in biotransformation, extraction and green production of D-mannose. Curr Res Food Sci 2022; 5:49-56. [PMID: 35005631 PMCID: PMC8718577 DOI: 10.1016/j.crfs.2021.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/10/2021] [Accepted: 12/11/2021] [Indexed: 11/29/2022] Open
Abstract
D-mannose is a natural and biologically active monosaccharide. It is the C-2 epimer of glucose and a component of a variety of polysaccharides in plants. In addition, D-mannose also naturally exists in some cells of the human body and participates in the immune regulation of cells as a prebiotic. Its good physiological benefits to human health and wide application in the food and pharmaceutical industries have attracted widespread attention. Therefore, in-depth research on preparation methods of D-mannose has been widely developed. This article summarizes the main production methods of D-mannose in recent years, especially the in-depth excavation from biomass raw materials such as coffee grounds, konjac flour, acai berry, etc., to provide new ideas for the green manufacture of D-mannose. Various methods of recent mannose production were comprehensively summarized. The new technical progress of obtaining mannose from biomass as emphatically discussed. Discuss various preparation methods including different pretreatments, enzymatic hydrolysis, etc.
Collapse
Affiliation(s)
- Peiyao Wang
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Yuting Zheng
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Yanping Li
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Ji Shen
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Meiling Dan
- College of Food Science, Southwest University, Chongqing, 400715, China
| | - Damao Wang
- College of Food Science, Southwest University, Chongqing, 400715, China
| |
Collapse
|
4
|
De Rose SA, Kuprat T, Isupov MN, Reinhardt A, Schönheit P, Littlechild JA. Biochemical and Structural Characterisation of a Novel D-Lyxose Isomerase From the Hyperthermophilic Archaeon Thermofilum sp. Front Bioeng Biotechnol 2021; 9:711487. [PMID: 34422783 PMCID: PMC8378251 DOI: 10.3389/fbioe.2021.711487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 07/13/2021] [Indexed: 11/30/2022] Open
Abstract
A novel D-lyxose isomerase has been identified within the genome of a hyperthermophilic archaeon belonging to the Thermofilum species. The enzyme has been cloned and over-expressed in Escherichia coli and biochemically characterised. This enzyme differs from other enzymes of this class in that it is highly specific for the substrate D-lyxose, showing less than 2% activity towards mannose and other substrates reported for lyxose isomerases. This is the most thermoactive and thermostable lyxose isomerase reported to date, showing activity above 95°C and retaining 60% of its activity after 60 min incubation at 80°C. This lyxose isomerase is stable in the presence of 50% (v/v) of solvents ethanol, methanol, acetonitrile and DMSO. The crystal structure of the enzyme has been resolved to 1.4–1.7 A. resolution in the ligand-free form and in complexes with both of the slowly reacting sugar substrates mannose and fructose. This thermophilic lyxose isomerase is stabilised by a disulfide bond between the two monomers of the dimeric enzyme and increased hydrophobicity at the dimer interface. These overall properties of high substrate specificity, thermostability and solvent tolerance make this lyxose isomerase enzyme a good candidate for potential industrial applications.
Collapse
Affiliation(s)
- Simone Antonio De Rose
- The Henry Wellcome Building for Biocatalysis, Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Tom Kuprat
- Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität Kiel, Kiel, Germany
| | - Michail N Isupov
- The Henry Wellcome Building for Biocatalysis, Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| | - Andreas Reinhardt
- Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität Kiel, Kiel, Germany
| | - Peter Schönheit
- Institut für Allgemeine Mikrobiologie, Christian-Albrechts-Universität Kiel, Kiel, Germany
| | - Jennifer A Littlechild
- The Henry Wellcome Building for Biocatalysis, Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom
| |
Collapse
|
5
|
Jin P, Wang Y, Liang Z, Yuan M, Li H, Du Q. Efficient bioconversion of high-concentration d-fructose into d-mannose by a novel N-acyl- d-glucosamine 2-epimerase from Thermobifida halotolerans. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01915a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A novel N-acyl-d-glucosamine 2-epimerase ThMI exhibits high mannose isomerase activity with a maximum bioconversion ratio of 35.8% in 500 g L−1d-fructose. Whole-cell biocatalyst produced 157 g L−1d-mannose from 500 g L−1d-fructose in 60 min.
Collapse
Affiliation(s)
- Peng Jin
- College of Agricultural and Food Sciences
- Zhejiang A & F University
- Hangzhou
- China
| | - Yuanyuan Wang
- College of Agricultural and Food Sciences
- Zhejiang A & F University
- Hangzhou
- China
| | - Zhengang Liang
- Technology Center of Haikou Customs District China
- Haikou 570311
- China
| | - Miao Yuan
- College of Agricultural and Food Sciences
- Zhejiang A & F University
- Hangzhou
- China
| | - Hua Li
- Institute of Microbial Engineering
- Henan University
- Kaifeng 475001
- China
| | - Qizhen Du
- College of Agricultural and Food Sciences
- Zhejiang A & F University
- Hangzhou
- China
| |
Collapse
|
6
|
Wu H, Chen M, Guang C, Zhang W, Mu W. Identification of a novel recombinant D-lyxose isomerase from Thermoprotei archaeon with high thermostable, weak-acid and nickel ion dependent properties. Int J Biol Macromol 2020; 164:1267-1274. [PMID: 32750472 DOI: 10.1016/j.ijbiomac.2020.07.222] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 07/16/2020] [Accepted: 07/24/2020] [Indexed: 10/23/2022]
Abstract
Recently, production of D-mannose becomes a hotspot owing to it exhibiting many physiological functions on people's health and wide applications in food and pharmaceutical field. The use of biological enzymes to production of D-mannose is of particular receiving considerable concerns due to it possessing many merits over chemical synthesis and plant extraction strategies. D-Lyxose isomerase (D-LIase) plays a pivotal role in preparation of D-mannose from d-fructose through isomerization reaction. Thus, a novel putative D-LIase from thermophiles strain Thermoprotei archaeon which was expressed in E. coli BL21(DE3) was first identified and biochemically characterized. The recombinant D-LIase showed an optimal temperature of 80 and 85 °C and pH of 6.5. It was highly thermostable at 70 °C and 80 °C after incubating for 48 h and 33 h, respectively, with retaining over 50% of the initial activity. A lower concentration of Ni2+ (0.5 mM) could greatly increase the activity by 25-fold, which was rare reported in other D-LIases. It was a dimer structure with melting temperature of 88.3 °C. Under the optimal conditions, 15.8 g L-1 of D-mannose and 33.8 g L-1 of D-xylulose were produced from 80 g L-1 of d-fructose and D-lyxose, respectively. This work provided a promising candidate sugar isomerase T. archaeon D-LIase for the production of D-mannose and D-xylulose.
Collapse
Affiliation(s)
- Hao Wu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Ming Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Cuie Guang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Wenli Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China.
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu 214122, China
| |
Collapse
|
7
|
Wu H, Chen M, Guang C, Zhang W, Mu W. Characterization of a recombinant D-mannose-producing D-lyxose isomerase from Caldanaerobius polysaccharolyticus. Enzyme Microb Technol 2020; 138:109553. [DOI: 10.1016/j.enzmictec.2020.109553] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 03/07/2020] [Accepted: 03/10/2020] [Indexed: 11/24/2022]
|
8
|
Recent studies on the biological production of D-mannose. Appl Microbiol Biotechnol 2019; 103:8753-8761. [DOI: 10.1007/s00253-019-10151-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/18/2019] [Accepted: 09/22/2019] [Indexed: 02/06/2023]
|
9
|
Guo Z, Long L, Ding S. Characterization of a D-lyxose isomerase from Bacillus velezensis and its application for the production of D-mannose and L-ribose. AMB Express 2019; 9:149. [PMID: 31529161 PMCID: PMC6746899 DOI: 10.1186/s13568-019-0877-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 09/09/2019] [Indexed: 11/10/2022] Open
Abstract
D-Mannose and L-ribose are two important monosaccharides, which have attracted public attention recently because of their great application potentials in food, cosmetic and pharmaceutical industries. Sugar isomerases catalyze the sugar isomerization and therefore can be used as the biocatalysts for production of the high-value sugars from inexpensive sugars. L-arabinose isomerase catalyzes the conversion of L-arabinose to L-ribulose, while D-lyxose isomerase catalyzes L-ribulose and D-fructose to L-ribose and D-mannose, respectively. In this paper, a putative D-LI from Bacillus velezensis (BvLI) was identified, characterized and used to produce D-mannose and L-ribose from D-fructose and L-arabinose, respectively. The recombinant BvLI exhibited a maximum activity at 55 °C and pH 6.5, in the presence of 0.1 mM Co2+. Approximately 110.75 g/L D-mannose was obtained from 500 g/L D-fructose in 6 h by the recombinant BvLI, and approximately 105 g/L L-ribose was obtained from 500 g/L L-arabinose in 8 h by the successive biocatalysis of L-arabinose isomerase from Bacillus licheniformis (BlAI) and BvLI.
Collapse
|
10
|
Characterization of a novel d-lyxose isomerase from Thermoflavimicrobium dichotomicum and its application for D-mannose production. Process Biochem 2019. [DOI: 10.1016/j.procbio.2019.05.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
|
11
|
Isomerases and epimerases for biotransformation of pentoses. Appl Microbiol Biotechnol 2018; 102:7283-7292. [PMID: 29968034 DOI: 10.1007/s00253-018-9150-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 05/23/2018] [Accepted: 05/24/2018] [Indexed: 01/08/2023]
Abstract
Pentoses represent monosaccharides with five carbon atoms. They are organized into two main groups, aldopentoses and ketopentoses. There are eight aldopentoses and four ketopentoses and each ketopentose corresponds to two aldopentoses. Only D-xylose, D-ribose, and L-arabinose are natural sugars, but others belong to rare sugars that occur in very small quantities in nature. Recently, rare pentoses attract much attention because of their great potentials for commercial applications, especially as precursors of many important medical drugs. Pentoses Izumoring strategy provides a complete enzymatic approach to link all pentoses using four types of enzymes, including ketose 3-epimerases, aldose-ketose isomerases, polyol dehydrogenases, and aldose reductases. At least 10 types of epimerases and isomerases have been used for biotransformation of all aldopentoses and ketopentoses, and these enzymes are reviewed in detail in this article.
Collapse
|
12
|
d-lyxose isomerase and its application for functional sugar production. Appl Microbiol Biotechnol 2018; 102:2051-2062. [DOI: 10.1007/s00253-018-8746-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 12/26/2017] [Accepted: 12/27/2017] [Indexed: 12/31/2022]
|
13
|
Efficient biotransformation of d-fructose to d-mannose by a thermostable d-lyxose isomerase from Thermosediminibacter oceani. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.08.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
14
|
Hu X, Shi Y, Zhang P, Miao M, Zhang T, Jiang B. d-Mannose: Properties, Production, and Applications: An Overview. Compr Rev Food Sci Food Saf 2016; 15:773-785. [DOI: 10.1111/1541-4337.12211] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 04/09/2016] [Accepted: 04/13/2016] [Indexed: 12/24/2022]
Affiliation(s)
- Xing Hu
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
- Synergetic Innovation Center of Food Safety and Nutrition; Jiangnan Univ; 1800 Lihu Avenue Wuxi Jiangsu 214122 P.R. China
| | - Yaning Shi
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
- College of Food Science and Technology; Nanjing Agricultural Univ; 1 Weigang Nanjing Jiangsu 210095 P.R. China
| | - Peng Zhang
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
- Synergetic Innovation Center of Food Safety and Nutrition; Jiangnan Univ; 1800 Lihu Avenue Wuxi Jiangsu 214122 P.R. China
| | - Ming Miao
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
- Synergetic Innovation Center of Food Safety and Nutrition; Jiangnan Univ; 1800 Lihu Avenue Wuxi Jiangsu 214122 P.R. China
| | - Bo Jiang
- State Key Laboratory of Food Science and Technology; Jiangnan Univ; 1800 Lihu Ave Wuxi Jiangsu 214122 P.R. China
- Synergetic Innovation Center of Food Safety and Nutrition; Jiangnan Univ; 1800 Lihu Avenue Wuxi Jiangsu 214122 P.R. China
| |
Collapse
|
15
|
Mu W, Yu L, Zhang W, Zhang T, Jiang B. Isomerases for biotransformation of D-hexoses. Appl Microbiol Biotechnol 2015; 99:6571-84. [DOI: 10.1007/s00253-015-6788-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 06/18/2015] [Accepted: 06/19/2015] [Indexed: 10/23/2022]
|
16
|
Production of L-ribose from L-ribulose by a triple-site variant of mannose-6-phosphate isomerase from Geobacillus thermodenitrificans. Appl Environ Microbiol 2012; 78:3880-4. [PMID: 22447612 DOI: 10.1128/aem.07012-11] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A triple-site variant (W17Q N90A L129F) of mannose-6-phosphate isomerase from Geobacillus thermodenitrificans was obtained by combining variants with residue substitutions at different positions after random and site-directed mutagenesis. The specific activity and catalytic efficiency (k(cat)/K(m)) for L-ribulose isomerization of this variant were 3.1- and 7.1-fold higher, respectively, than those of the wild-type enzyme at pH 7.0 and 70°C in the presence of 1 mM Co(2+). The triple-site variant produced 213 g/liter l-ribose from 300 g/liter L-ribulose for 60 min, with a volumetric productivity of 213 g liter(-1) h(-1), which was 4.5-fold higher than that of the wild-type enzyme. The k(cat)/K(m) and productivity of the triple-site variant were approximately 2-fold higher than those of the Thermus thermophilus R142N variant of mannose-6-phosphate isomerase, which exhibited the highest values previously reported.
Collapse
|
17
|
Choi JG, Hong SH, Kim YS, Kim KR, Oh DK. Characterization of a recombinant thermostable d-lyxose isomerase from Dictyoglomus turgidum that produces d-lyxose from d-xylulose. Biotechnol Lett 2012; 34:1079-85. [DOI: 10.1007/s10529-012-0874-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 02/02/2012] [Indexed: 11/25/2022]
|
18
|
Characterization of a recombinant cellobiose 2-epimerase from Caldicellulosiruptor saccharolyticus and its application in the production of mannose from glucose. Appl Microbiol Biotechnol 2011; 92:1187-96. [DOI: 10.1007/s00253-011-3403-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2011] [Revised: 05/03/2011] [Accepted: 05/19/2011] [Indexed: 10/18/2022]
|
19
|
Patel DH, Wi SG, Lee SG, Lee DS, Song YH, Bae HJ. Substrate specificity of the Bacillus licheniformis lyxose isomerase YdaE and its application in in vitro catalysis for bioproduction of lyxose and glucose by two-step isomerization. Appl Environ Microbiol 2011; 77:3343-50. [PMID: 21421786 PMCID: PMC3126444 DOI: 10.1128/aem.02693-10] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 03/10/2011] [Indexed: 12/25/2022] Open
Abstract
Enzymatic processes are useful for industrially important sugar production, and in vitro two-step isomerization has proven to be an efficient process in utilizing readily available sugar sources. A hypothetical uncharacterized protein encoded by ydaE of Bacillus licheniformis was found to have broad substrate specificities and has shown high catalytic efficiency on D-lyxose, suggesting that the enzyme is D-lyxose isomerase. Escherichia coli BL21 expressing the recombinant protein, of 19.5 kDa, showed higher activity at 40 to 45°C and pH 7.5 to 8.0 in the presence of 1.0 mM Mn²+. The apparent K(m) values for D-lyxose and D-mannose were 30.4 ± 0.7 mM and 26 ± 0.8 mM, respectively. The catalytic efficiency (k(cat)/K(m)) for lyxose (3.2 ± 0.1 mM⁻¹ s⁻¹) was higher than that for D-mannose (1.6 mM⁻¹ s⁻¹). The purified protein was applied to the bioproduction of D-lyxose and D-glucose from d-xylose and D-mannose, respectively, along with the thermostable xylose isomerase of Thermus thermophilus HB08. From an initial concentration of 10 mM D-lyxose and D-mannose, 3.7 mM and 3.8 mM D-lyxose and D-glucose, respectively, were produced by two-step isomerization. This two-step isomerization is an easy method for in vitro catalysis and can be applied to industrial production.
Collapse
Affiliation(s)
- Darshan H. Patel
- Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Seung Gon Wi
- Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Seong-Gene Lee
- Department of Biotechnology, Bio-energy Research Center, Biotechnology Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Dae-Seok Lee
- Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Youn-ho Song
- Department of Biotechnology, Bio-energy Research Center, Biotechnology Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Hyeun-Jong Bae
- Bio-energy Research Institute, Chonnam National University, Gwangju 500-757, Republic of Korea
- Department of Forest Products and Technology (BK21 Program), Chonnam National University, Gwangju 500-757, Republic of Korea
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
| |
Collapse
|