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Palaniappan A, Emmambux MN. The challenges in production technology, health-associated functions, physico-chemical properties and food applications of isomaltooligosaccharides. Crit Rev Food Sci Nutr 2021:1-17. [PMID: 34698594 DOI: 10.1080/10408398.2021.1994522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Isomaltooligosaccharides (IMOs) are recognized as functional food ingredients with prebiotic potential that deliver health benefits. IMOs have attained commercial interest as they are produced from low-cost agricultural products that are widely available and have prospective applications in the food industry. The review examines the various production processes and the main challenges involved in deriving diverse structures of IMO with maximized yield and increased functionality. The different characterization and purification techniques employed for structural elucidation, the physico-chemical importance, technological properties, food-based applications and biological effects (in vitro and in vivo interventions) have been discussed in detail. The key finding is the need for research involving biotechnological and enzymology aspects to simplify the production technologies that meet the industrial and consumer requirements. The knowledge from this article delivers a clear insight to scientists, food technologists and the general public for the improved utilization of IMOs to support the emerging market for functional foods and nutraceuticals.
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Affiliation(s)
- Ayyappan Palaniappan
- Department of Consumer and Food Sciences, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Mohammad Naushad Emmambux
- Department of Consumer and Food Sciences, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
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2
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Park BR, Park JY, Lee SH, Hong SJ, Jeong JH, Choi JH, Park SY, Park CS, Lee HN, Kim YM. Synthesis of improved long-chain isomaltooligosaccharide, using a novel glucosyltransferase derived from Thermoanaerobacter thermocopriae, with maltodextrin. Enzyme Microb Technol 2021; 147:109788. [PMID: 33992410 DOI: 10.1016/j.enzmictec.2021.109788] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 03/19/2021] [Accepted: 03/19/2021] [Indexed: 11/19/2022]
Abstract
Isomaltooligosaccharide (IMO), considered to be a prebiotic, reportedly has health effects, particularly in terms of digestion; however, the prebiotic effects of IMOs depend largely on the degree of polymerization. Currently, IMOs are commercially produced using transglucosidase (TG) derived from Aspergillus niger. Here, we report a novel Thermoanaerobacter thermocopriae-derived TG (TtTG) that can produce long-chain IMOs (L-IMOs) using maltodextrin as the main substrate. A putative carbohydrate-binding gene comprising carbohydrate-binding module 35 and glycoside hydrolase family 15 domain was cloned and successfully overexpressed in Escherichia coli BL21 (DE3) cells. The resulting purified recombinant enzyme (TtTG) had a molecular mass of 94 kDa. TtTG displayed an optimal pH of 4.0 (higher than that of commercial TG) and an optimal temperature of 60 °C (same as that of commercial TG). TtTG also enabled the synthesis of oligosaccharides using various saccharides, such as palatinose, kojibiose, sophorose, maltose, cellobiose, isomaltose, gentiobiose, and trehalose, which acted as specific acceptors. TtTG could also produce a medium-sized L-IMO, different from that by dextran-dextrinase and TG, from maltodextrin, as the sole substrate. Thus, the novel combination of maltodextrin and TtTG shows potential as an effective method for commercially producing L-IMOs with improved prebiotic effects.
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Affiliation(s)
- Bo-Ram Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea.
| | - Ji Yeong Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - So Hee Lee
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Seong-Jin Hong
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Ji Hye Jeong
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Ji-Ho Choi
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Shin-Yong Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Chan Soon Park
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Ha-Nul Lee
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Young-Min Kim
- Department of Food Science and Technology, Chonnam National University, Gwangju, 61186, Republic of Korea.
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Hu X, Song L, Yang Y, Wang L, Li Y, Miao M. Biosynthesis, structural characteristics and prebiotic properties of maltitol-based acceptor products. J Funct Foods 2021. [DOI: 10.1016/j.jff.2021.104374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Yang Y, Ma Y, Hu X, Cui SW, Zhang T, Miao M. Reuteransucrase-catalytic kinetic modeling and functional characteristics for novel prebiotic gluco-oligomers. Food Funct 2020; 11:7037-7047. [PMID: 32812985 DOI: 10.1039/d0fo00225a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
This work describes the reuteransucrase-catalyzed reaction and structural characterization as well as in vitro fermentation for the acceptor products of gluco-oligomers from sucrose and maltose. At a low concentration of sucrose, the production of gluco-oligomers was favored, resulting in a relatively large number of acceptor products (DP3-5). A mathematical model was also proposed to simulate gluco-oligomer production depending on the reaction conditions. The fine structures of major linear gluco-oligomer fractions for a sucrose : maltose ratio of 1 : 1 were assigned as follows: α-d-Glcp-(1→6)-α-d-Glcp-(1→4)-d-Glcp, α-d-Glcp-(1→4)-α-d-Glcp-(1→4)-α-d-Glcp-(1→4)-d-Glcp, α-d-Glcp-(1→4)-α-d-Glcp-(1→6)-α-d-Glcp-(1→4)-d-Glcp, and α-d-Glcp-(1→6)-α-d-Glcp-(1→4)-α-d-Glcp-(1→6)-α-d-Glcp-(1→4)-d-Glcp, respectively. Compared with dextran and GOS57, the results of fermentation selectivity indicated that gluco-oligomers promoted the proliferation of gut bacteria and total SCFA production with a higher concentration of propionate. These data suggested that the gluco-oligomers synthesized via the reuteransucrase acceptor reaction had a prebiotic effect on gastrointestinal health.
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Affiliation(s)
- Yuqi Yang
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China.
| | - Yajun Ma
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China.
| | - Xiuting Hu
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China.
| | - Steve W Cui
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China. and Guelph Food Research Centre, Agriculture and Agri-Food Canada, 93 Stone Road West, Guelph, Ont., Canada N1G 5C9
| | - Tao Zhang
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China.
| | - Ming Miao
- State Key Laboratory of Food Science & Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, P. R. China.
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Huang SX, Hou DZ, Qi PX, Wang Q, Chen HL, Ci LY, Chen S. Enzymatic synthesis of non-digestible oligosaccharide catalyzed by dextransucrase and dextranase from maltose acceptor reaction. Biochem Biophys Res Commun 2020; 523:651-657. [DOI: 10.1016/j.bbrc.2019.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 12/02/2019] [Indexed: 01/05/2023]
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Hu Y, Winter V, Chen XY, Gänzle MG. Effect of acceptor carbohydrates on oligosaccharide and polysaccharide synthesis by dextransucrase DsrM from Weissella cibaria. Food Res Int 2017; 99:603-611. [DOI: 10.1016/j.foodres.2017.06.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 06/08/2017] [Accepted: 06/17/2017] [Indexed: 01/10/2023]
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7
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Highly efficient enzymatic preparation of isomalto-oligosaccharides from starch using an enzyme cocktail. ELECTRON J BIOTECHN 2017. [DOI: 10.1016/j.ejbt.2016.12.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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8
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Enzymatic synthesis using immobilized Enterococcus faecalis Esawy dextransucrase and some applied studies. Int J Biol Macromol 2016; 92:56-62. [PMID: 27327909 DOI: 10.1016/j.ijbiomac.2016.06.041] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/08/2016] [Accepted: 06/13/2016] [Indexed: 11/22/2022]
Abstract
Dextrans enzymatic synthesis by immobilized Enterococcus faecalis Esawy dextransucrase was studied. Different parameters, such as: enzyme protein concentration (EPC), substrate concentration (SC), temperature and reaction time were evaluated. EPC played a fundamental role in controlling dextran molecular size with 0.1% dextran in reaction mixture. Dextran 38,397 and 125,471Da were yielded at EPC 4.78 and 5.78mg, respectively. Proper dextrans (73,378 and 117,521Da) demanded in pharmaceutical applications were achieved at 6% and 12% sucrose concentrations and at 4.78 and 5.78mg EPC, respectively. Optimum temperature for conversion of glucose to dextran was 30°C (73% and 80% at 5.78 and 4.78mg EPC, respectively). Varieties of maltooligosaccharides (MOS) were yielded by synergistic cooperation between sucrose and maltose. Six MOS and three dextrans samples in vitro have prebiotic effect on Lactobacillus casei with degree of variation. Two samples of MOS with different degree of polymerization (DP) and three samples of dextran with different molecular weight (MW) reported different fibrinolytic activity.
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Lactose- and cellobiose-derived branched trisaccharides and a sucrose-containing trisaccharide produced by acceptor reactions of Weissella confusa dextransucrase. Food Chem 2016. [DOI: 10.1016/j.foodchem.2015.05.090] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Flavonoid glucosylation by non-Leloir glycosyltransferases: formation of multiple derivatives of 3,5,7,3′,4′-pentahydroxyflavane stereoisomers. Appl Microbiol Biotechnol 2015; 99:9565-76. [DOI: 10.1007/s00253-015-6760-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 05/24/2015] [Accepted: 06/04/2015] [Indexed: 12/26/2022]
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Fang Y, Wu J, Xu ZK. Dextransucrase-catalyzed elongation of polysaccharide brushes with immobilized mono-/di-saccharides as acceptors. Chem Commun (Camb) 2015; 51:129-32. [PMID: 25383964 DOI: 10.1039/c4cc06137c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A quartz crystal microbalance (QCM) was used to monitor dextransucrase (DSase)-catalyzed polysaccharide elongation on the glucose-/maltose-ended self-assembly monolayer (SAM) surfaces. Kinetic parameters of the enzymatic elongation indicate that maltose is a promising substrate acceptor for DSase.
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Affiliation(s)
- Yan Fang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China.
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Barea-Alvarez M, Benito MT, Olano A, Jimeno ML, Moreno FJ. Synthesis and characterization of isomaltulose-derived oligosaccharides produced by transglucosylation reaction of Leuconostoc mesenteroides dextransucrase. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:9137-9144. [PMID: 25175804 DOI: 10.1021/jf5033735] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This paper reports the efficient enzymatic synthesis of a homologous series of isomaltulose-derived oligosaccharides with degrees of polymerization ranging from 3 to 9 through the transglucosylation reaction using a dextransucrase from Leuconostoc mesenteroides B-512F. The total oligosaccharide yield obtained under optimal conditions was 41-42% (in weight with respect to the initial amount of isomaltulose) after 24-48 h of reaction. Nuclear magnetic resonance (NMR) structural characterization indicated that dextransucrase specifically transferred glucose moieties of sucrose to the C-6 of the nonreducing glucose residue of isomaltulose. Likewise, monitoring the progression of the content of each individual oligosaccharide indicated that oligosaccharide acceptor products of low molecular weight acted in turn as acceptors for further transglucosylation to yield oligosaccharides of a higher degree of polymerization. The produced isomaltulose-derived oligosaccharides can be considered as isomalto-oligosaccharides (IMOs) because they are linked by only α-(1→6) bonds. In addition, having isomaltulose as the core structure, these IMO-like structures could possess appealing bioactive properties that could find potential applications as functional food ingredients.
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Affiliation(s)
- Montserrat Barea-Alvarez
- Departamento Bioactividad y Análisis de Alimentos, Instituto de Investigación en Ciencias de la Alimentación, CIAL (CSIC-UAM), CEI (UAM+CSIC) , c/Nicolás Cabrera 9, 28049 Madrid, Spain
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Kothari D, Goyal A. Structural characterization of enzymatically synthesized dextran and oligosaccharides from Leuconostoc mesenteroides NRRL B-1426 dextransucrase. BIOCHEMISTRY (MOSCOW) 2013; 78:1164-70. [DOI: 10.1134/s0006297913100118] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Daudé D, Champion E, Morel S, Guieysse D, Remaud-Siméon M, André I. Probing Substrate Promiscuity of Amylosucrase fromNeisseria polysaccharea. ChemCatChem 2013. [DOI: 10.1002/cctc.201300012] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Leemhuis H, Pijning T, Dobruchowska JM, van Leeuwen SS, Kralj S, Dijkstra BW, Dijkhuizen L. Glucansucrases: three-dimensional structures, reactions, mechanism, α-glucan analysis and their implications in biotechnology and food applications. J Biotechnol 2012; 163:250-72. [PMID: 22796091 DOI: 10.1016/j.jbiotec.2012.06.037] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 06/13/2012] [Accepted: 06/18/2012] [Indexed: 12/26/2022]
Abstract
Glucansucrases are extracellular enzymes that synthesize a wide variety of α-glucan polymers and oligosaccharides, such as dextran. These carbohydrates have found numerous applications in food and health industries, and can be used as pure compounds or even be produced in situ by generally regarded as safe (GRAS) lactic acid bacteria in food applications. Research in the recent years has resulted in big steps forward in the understanding and exploitation of the biocatalytic potential of glucansucrases. This paper provides an overview of glucansucrase enzymes, their recently elucidated crystal structures, their reaction and product specificity, and the structural analysis and applications of α-glucan polymers. Furthermore, we discuss key developments in the understanding of α-glucan polymer formation based on the recently elucidated three-dimensional structures of glucansucrase proteins. Finally we discuss the (potential) applications of α-glucans produced by lactic acid bacteria in food and health related industries.
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Affiliation(s)
- Hans Leemhuis
- Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute-GBB, University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
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Goffin D, Delzenne N, Blecker C, Hanon E, Deroanne C, Paquot M. Will isomalto-oligosaccharides, a well-established functional food in Asia, break through the European and American market? The status of knowledge on these prebiotics. Crit Rev Food Sci Nutr 2011; 51:394-409. [PMID: 21491266 DOI: 10.1080/10408391003628955] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This critical review article presents the current state of knowledge on isomalto-oligosaccharides, some well known functional oligosaccharides in Asia, to evaluate their potential as emergent prebiotics in the American and European functional food market. It includes first a unique inventory of the different families of compounds which have been considered as IMOs and their specific structure. A description has been given of the different production methods including the involved enzymes and their specific activities, the substrates, and the types of IMOs produced. Considering the structural complexity of IMO products, specific characterization methods are described, as well as purification methods which enable the body to get rid of digestible oligosaccharides. Finally, an extensive review of their techno-functional and nutritional properties enables placing IMOs inside the growing prebiotic market. This review is of particular interest considering that IMO commercialization in America and Europe is a topical subject due to the recent submission by Bioneutra Inc. (Canada) of a novel food file to the UK Food Standards Agency, as well as several patents for IMO production.
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Affiliation(s)
- Dorothee Goffin
- Department of Industrial Biological Chemistry, University of Liege - Gembloux Agro-Bio Tech, Passage des D´eport´es, 2, B-5030 Gembloux, Belgium.
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De Groeve MR, Remmery L, Van Hoorebeke A, Stout J, Desmet T, Savvides SN, Soetaert W. Construction of cellobiose phosphorylase variants with broadened acceptor specificity towards anomerically substituted glucosides. Biotechnol Bioeng 2010; 107:413-20. [DOI: 10.1002/bit.22818] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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André I, Potocki-Véronèse G, Morel S, Monsan P, Remaud-Siméon M. Sucrose-Utilizing Transglucosidases for Biocatalysis. Top Curr Chem (Cham) 2010; 294:25-48. [DOI: 10.1007/128_2010_52] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Synthesis of dextrans with controlled amounts of α-1,2 linkages using the transglucosidase GBD–CD2. Appl Microbiol Biotechnol 2009; 86:545-54. [DOI: 10.1007/s00253-009-2241-z] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2009] [Revised: 07/31/2009] [Accepted: 09/02/2009] [Indexed: 10/20/2022]
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22
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Seibel J, Jördening HJ, Buchholz K. Glycosylation with activated sugars using glycosyltransferases and transglycosidases. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420600986811] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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RABELO M, HONORATO T, GONÇALVES L, PINTO G, RODRIGUES S. OPTIMIZATION OF ENZYMATIC SYNTHESIS OF ISOMALTO-OLIGOSACCHARIDES PRODUCTION. J Food Biochem 2009. [DOI: 10.1111/j.1745-4514.2009.00222.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Champion E, André I, Moulis C, Boutet J, Descroix K, Morel S, Monsan P, Mulard LA, Remaud-Siméon M. Design of α-Transglucosidases of Controlled Specificity for Programmed Chemoenzymatic Synthesis of Antigenic Oligosaccharides. J Am Chem Soc 2009; 131:7379-89. [DOI: 10.1021/ja900183h] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elise Champion
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Isabelle André
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Claire Moulis
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Julien Boutet
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Karine Descroix
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Sandrine Morel
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Pierre Monsan
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Laurence A. Mulard
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
| | - Magali Remaud-Siméon
- Université de Toulouse; INSA, UPS, INP, LISBP, 135 avenue de Rangueil, F-31077 Toulouse, France, CNRS UMR 5504, F-31400 Toulouse, France, INRA UMR 792, Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse, France, Institut Universitaire de France, 103 boulevard Saint-Michel, F-75005 Paris, France, Institut Pasteur, Unité de Chimie des Biomolécules, CNRS URA 2128, 28 rue du Dr. Roux, F-75015 Paris, France, and Université Paris Descartes, 4 avenue de l’Observatoire, F-75006 Paris, France
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Towards tailor-made oligosaccharides-chemo-enzymatic approaches by enzyme and substrate engineering. Appl Microbiol Biotechnol 2009; 83:209-16. [PMID: 19357843 DOI: 10.1007/s00253-009-1989-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2009] [Revised: 03/23/2009] [Accepted: 03/23/2009] [Indexed: 10/20/2022]
Abstract
Carbohydrate structures have been identified in eukaryotic and prokaryotic cells as glycoconjugates with communication skills. Their recently discussed role in various diseases has attracted high attention in the development of simple and convenient methods for oligosaccharide synthesis. In this review, recent approaches combining nature's power for the design of tailor made biocatalysts by enzyme engineering and substrate engineering will be presented. These strategies lead to highly efficient and selective glycosylation reactions. The introduced concept shall be a first step in the direction to a glycosylation toolbox which paves the way for the tailor-made synthesis of designed carbohydrate structures.
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Champion E, André I, Mulard LA, Monsan P, Remaud-Siméon M, Morel S. Synthesis of L-Rhamnose andN-Acetyl-D-Glucosamine Derivatives Entering in the Composition of Bacterial Polysaccharides by Use of Glucansucrases. J Carbohydr Chem 2009. [DOI: 10.1080/07328300902755796] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Elise Champion
- a Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France
- b CNRS , UMR5504, F-31400, Toulouse, France
- c INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400, Toulouse, France
| | - Isabelle André
- a Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France
- b CNRS , UMR5504, F-31400, Toulouse, France
- c INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400, Toulouse, France
| | - Laurence A. Mulard
- d Institut Pasteur, Unité de Chimie des Biomolécules , CNRS URA 2128, 28 rue du Dr. Roux, F-75015, Paris, France
| | - Pierre Monsan
- a Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France
- b CNRS , UMR5504, F-31400, Toulouse, France
- c INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400, Toulouse, France
- e Institut Universitaire de France , 103 Boulevard Saint-Michel, F-75005, Paris, France
| | - Magali Remaud-Siméon
- a Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France
- b CNRS , UMR5504, F-31400, Toulouse, France
- c INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400, Toulouse, France
| | - Sandrine Morel
- a Université de Toulouse , INSA, UPS, INP, LISBP, 135 Avenue de Rangueil, F-31077, Toulouse, France
- b CNRS , UMR5504, F-31400, Toulouse, France
- c INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés , F-31400, Toulouse, France
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27
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Heterologous hyper-expression of a glucansucrase-type glycosyltransferase gene. Appl Microbiol Biotechnol 2008; 79:255-61. [PMID: 18379778 DOI: 10.1007/s00253-008-1435-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2007] [Revised: 02/26/2008] [Accepted: 02/26/2008] [Indexed: 10/22/2022]
Abstract
Heterologous expression of the large glucansucrase-type glycosyltransferases genes is still a challenge, and typically yields are poor. Therefore, a number of different Escherichia coli systems for the expression of such a gene, encoding the glycosyltransferase R (GtfR) from Streptococcus oralis, were constructed and evaluated. We thereby obtained a strain producing the highest molar yields described so far for this class of enzymes. Cloning of a 5'-terminally truncated version of the gene in the expression vector pET33b(+) yielded, in dissolved form, about 2 micromol (300 mg) of enzyme per liter of culture of an optical density at 600 nm of four. Problems frequently encountered in the heterologous biosynthesis of this class of enzymes, such as formation of a high fraction of insoluble aggregates and/or proteolytic degradation, were not observed in the described system. The over-produced enzyme, devoid of almost its entire variable region, retained its characteristic activities.
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28
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Jördening HJ, Erhardt F, Holtkamp M, Buchholz K, Scholl S. Verfahrens- und Katalysatordesign als Aufarbeitungsstrategie für die enzymatische Darstellung von Isomaltose. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200800033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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29
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Expression and characterization of dextransucrase gene dsrX from Leuconostoc mesenteroides in Escherichia coli. J Biotechnol 2008; 133:505-12. [DOI: 10.1016/j.jbiotec.2007.12.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2007] [Revised: 11/15/2007] [Accepted: 12/05/2007] [Indexed: 11/18/2022]
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30
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Van der Meulen R, Grosu-Tudor S, Mozzi F, Vaningelgem F, Zamfir M, de Valdez GF, De Vuyst L. Screening of lactic acid bacteria isolates from dairy and cereal products for exopolysaccharide production and genes involved. Int J Food Microbiol 2007; 118:250-8. [PMID: 17716765 DOI: 10.1016/j.ijfoodmicro.2007.07.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2006] [Revised: 05/04/2007] [Accepted: 07/22/2007] [Indexed: 11/16/2022]
Abstract
A total of 174 lactic acid bacteria (LAB) strains isolated from dairy and cereal products were screened for the production of exopolysaccharides (EPS). Therefore, a rapid screening method was developed based on ultrafiltration and gel permeation chromatography. Furthermore, a screening through the polymerase chain reaction (PCR) was performed with primer pairs targeting different genes involved in EPS production. Nine isolates produced a homopolysaccharide of the glucan type, whereas only one strain produced a heteropolysaccharide. The production of a glucan by a strain of Lactococcus lactis and the production of a heteropolysaccharide by a strain of Lactobacillus curvatus are reported for the first time. The PCR screening revealed many positive strains. For three of the ten EPS-producing strains, no corresponding genes could be detected. Furthermore, a lot of strains possessed one or more eps genes but did not produce an EPS. Therefore, a screening on the molecular level should always be accompanied by another screening method that is able to distinguish true EPS producer strains from non-producing ones. Statistical analysis did not reveal any relationship between the type and origin of the strains, the presence or absence of a capsular polysaccharide or EPS, and the presence or absence of eps genes.
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Affiliation(s)
- Roel Van der Meulen
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Department of Applied Biological Sciences and Engineering, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
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31
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Hellmuth H, Hillringhaus L, Höbbel S, Kralj S, Dijkhuizen L, Seibel J. Highly Efficient Chemoenzymatic Synthesis of Novel Branched Thiooligosaccharides by Substrate Direction with Glucansucrases. Chembiochem 2007; 8:273-6. [PMID: 17219452 DOI: 10.1002/cbic.200600444] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hendrik Hellmuth
- Technical Chemistry, Department for Carbohydrate Technology, Technical University Braunschweig, Hans-Sommer Strasse 10, 38106 Braunschweig, Germany
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32
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van Hijum SAFT, Kralj S, Ozimek LK, Dijkhuizen L, van Geel-Schutten IGH. Structure-function relationships of glucansucrase and fructansucrase enzymes from lactic acid bacteria. Microbiol Mol Biol Rev 2006; 70:157-76. [PMID: 16524921 PMCID: PMC1393251 DOI: 10.1128/mmbr.70.1.157-176.2006] [Citation(s) in RCA: 316] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Lactic acid bacteria (LAB) employ sucrase-type enzymes to convert sucrose into homopolysaccharides consisting of either glucosyl units (glucans) or fructosyl units (fructans). The enzymes involved are labeled glucansucrases (GS) and fructansucrases (FS), respectively. The available molecular, biochemical, and structural information on sucrase genes and enzymes from various LAB and their fructan and alpha-glucan products is reviewed. The GS and FS enzymes are both glycoside hydrolase enzymes that act on the same substrate (sucrose) and catalyze (retaining) transglycosylation reactions that result in polysaccharide formation, but they possess completely different protein structures. GS enzymes (family GH70) are large multidomain proteins that occur exclusively in LAB. Their catalytic domain displays clear secondary-structure similarity with alpha-amylase enzymes (family GH13), with a predicted permuted (beta/alpha)(8) barrel structure for which detailed structural and mechanistic information is available. Emphasis now is on identification of residues and regions important for GS enzyme activity and product specificity (synthesis of alpha-glucans differing in glycosidic linkage type, degree and type of branching, glucan molecular mass, and solubility). FS enzymes (family GH68) occur in both gram-negative and gram-positive bacteria and synthesize beta-fructan polymers with either beta-(2-->6) (inulin) or beta-(2-->1) (levan) glycosidic bonds. Recently, the first high-resolution three-dimensional structures have become available for FS (levansucrase) proteins, revealing a rare five-bladed beta-propeller structure with a deep, negatively charged central pocket. Although these structures have provided detailed mechanistic insights, the structural features in FS enzymes dictating the synthesis of either beta-(2-->6) or beta-(2-->1) linkages, degree and type of branching, and fructan molecular mass remain to be identified.
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Affiliation(s)
- Sacha A F T van Hijum
- Department of Molecular Genetics, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, P.O. Box 14, 9750 AA Haren, The Netherlands.
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Bertrand A, Morel S, Lefoulon F, Rolland Y, Monsan P, Remaud-Simeon M. Leuconostoc mesenteroides glucansucrase synthesis of flavonoid glucosides by acceptor reactions in aqueous-organic solvents. Carbohydr Res 2006; 341:855-63. [PMID: 16530175 DOI: 10.1016/j.carres.2006.02.008] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2005] [Revised: 01/17/2006] [Accepted: 02/10/2006] [Indexed: 11/28/2022]
Abstract
The enzymatic glucosylation of luteolin was attempted using two glucansucrases: the dextransucrase from Leuconostoc mesenteroides NRRL B-512F and the alternansucrase from L. mesenteroides NRRL B-23192. Reactions were carried out in aqueous-organic solvents to improve luteolin solubility. A molar conversion of 44% was achieved after 24h of reaction catalysed by dextransucrase from L. mesenteroides NRRL B-512F in a mixture of acetate buffer (70%)/bis(2-methoxyethyl) ether (30%). Two products were characterised by nuclear magnetic resonance (NMR) spectroscopy: luteolin-3'-O-alpha-d-glucopyranoside and luteolin-4'-O-alpha-d-glucopyranoside. In the presence of alternansucrase from L. mesenteroides NRRL B-23192, three additional products were obtained with a luteolin conversion of 8%. Both enzymes were also able to glucosylate quercetin and myricetin with conversion of 4% and 49%, respectively.
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Affiliation(s)
- Anne Bertrand
- Laboratoire Biotechnologie-Bioprocédés UMR CNRS 5504, UMR INRA 792, INSA DGBA, 135 avenue de Rangueil, 31077 Toulouse Cedex 04, France
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34
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Kok-Jacon GA, Vincken JP, Suurs LCJM, Wang D, Liu S, Visser RGF. Production of dextran in transgenic potato plants. Transgenic Res 2005; 14:385-95. [PMID: 16201405 DOI: 10.1007/s11248-005-0439-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The production of dextran in potato tubers and its effect on starch biosynthesis were investigated. The mature dextransucrase (DsrS) gene from Leuconostoc mesenteroides was fused to the chloroplastic ferredoxin signal peptide (FD) enabling amyloplast entry, which was driven by the highly tuber-expressed patatin promoter. After transformation of two potato genotypes (cv. Kardal and the amylose-free (amf) mutant), dextrans were detected by enzyme-linked immunosorbent assay (ELISA) in tuber juices of Kardal and amf transformants. The dextran concentration appeared two times higher in the Kardal (about 1.7 mg/g FW) than in the amf transformants. No dextran was detected by ELISA inside the starch granule. Interestingly, starch granule morphology was affected, which might be explained by the accumulation of dextran in tuber juices. In spite of that, no significant changes of the physicochemical properties of the starches were detected. Furthermore, we have observed no clear changes in chain length distributions, despite the known high acceptor efficiency of DSRS.
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Affiliation(s)
- Géraldine A Kok-Jacon
- Graduate School Experimental Plant Sciences, Laboratory of Plant Breeding, Wageningen University, The Netherlands
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35
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Malten M, Nahrstedt H, Meinhardt F, Jahn D. Coexpression of the type I signal peptidase gene sipM increases recombinant protein production and export in Bacillus megaterium MS941. Biotechnol Bioeng 2005; 91:616-21. [PMID: 16003778 DOI: 10.1002/bit.20523] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The removal of the signal peptide from a precursor protein is a crucial step of protein secretion. In order to improve Bacillus megaterium as protein production and secretion host, the influence of homologous type I signal peptidase SipM overproduction on recombinant Leuconostoc mesenteroides dextransucrase DsrS synthesis and export was investigated. The dsrS gene was integrated as a single copy into the chromosomal bgaM locus encoding beta-galactosidase. Desired clones were identified by blue-white selection. In this strain, the expression of sipM from a multicopy plasmid using its own promoter increased the amount of secreted DsrS 3.7-fold. This increase in protein secretion by SipM overproduction was next transferred to a high level DsrS production strain using a multicopy plasmid encoding sipM with its natural promoter and dsrS under control of a strong xylose-inducible promoter. No further increase in DsrS export were observed when this vector was carrying two sipM copies. Similarly, bicistronic sipM and dsrS high level expression did not enhance DsrS secretion, indicating the natural limitation of the approach. Interestingly, SipM-enhanced DsrS secretion also resulted in an overall increase of DsrS production.
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Affiliation(s)
- Marco Malten
- Institute of Microbiology, Technical University Braunschweig, Spielmannstrasse 7, D-38106 Braunschweig, Germany
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36
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Baciu IE, Jördening HJ, Seibel J, Buchholz K. Investigations of the transfructosylation reaction by fructosyltransferase from B. subtilis NCIMB 11871 for the synthesis of the sucrose analogue galactosyl-fructoside. J Biotechnol 2005; 116:347-57. [PMID: 15748761 DOI: 10.1016/j.jbiotec.2004.10.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2004] [Revised: 10/04/2004] [Accepted: 10/14/2004] [Indexed: 10/25/2022]
Abstract
The exo-fructosyltransferase produced from B. subtilis NCIMB 11871 strain transfers the fructose moiety from donor alpha12 linked saccharides such as sucrose, raffinose and stachyose to the acceptor d-galactose, leading to the sucrose analogue, galactosyl-fructoside. Here, we report detailed kinetic studies. The enzyme showed a remarkably high optimal temperature at 50 degrees C and was effectively immobilised on Eupergit C 250 L and Trisopor-Amino. This is also the first report about the equilibrium of the transfructosylation reaction, its activation energy determination, the structure of the product and its preparative scale isolation.
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Affiliation(s)
- I-E Baciu
- Technical Chemistry, Department for Carbohydrate Technology, Technical University Braunschweig, Langer Kamp 5, D-38106 Braunschweig, Germany
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37
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Berensmeier S, Ergezinger M, Bohnet M, Buchholz K. Design of immobilised dextransucrase for fluidised bed application. J Biotechnol 2004; 114:255-67. [PMID: 15522435 DOI: 10.1016/j.jbiotec.2004.04.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2003] [Revised: 04/19/2004] [Accepted: 04/22/2004] [Indexed: 10/26/2022]
Abstract
Immobilisation of dextransucrase from Leuconostoc mesenteroides NRRL B-512F in alginate is optimised for applications in a fluidised bed reactor with high concentrated sugar solutions, in order to allow a continuous formation of defined oligosaccharides as prebiotic isomalto-oligosaccharides. Efficient design of fluidised bed immobilised biocatalyst in high density solutions requires particles with elevated density, high effectiveness and both thermal and mechanical stability. Inert silica flour/sand (Mikrosil 300) as supplement turned out to be best suited for increasing the density up to 1400 kg m(-3) of the alginate beads and generating a stable expanded bed without diffusional restrictions. Kinetic investigations demonstrate that low effectiveness of immobilised enzyme due to close association to dextranpolymers (dextran content of enzyme preparation >90%) is compensated by reducing the particle size and/or by decreasing the dextran content. A low dextran content (5%) is sufficient to immobilise and stabilise the enzyme, thus diffusional limitation is reduced essentially while operational stability is maintained. Fluidisation behaviour and bed expansion proved to be appropriate for the intended application. Both calculated and measured expansion coefficients showed good agreement for different conditions.
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Affiliation(s)
- S Berensmeier
- Department for Carbohydrates, Technical University Braunschweig, Langer Kamp 5, D-38106 Braunschweig, Germany
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38
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Berensmeier S, Buchholz K. Separation of isomaltose from high sugar concentrated enzyme reaction mixture by dealuminated β-zeolite. Sep Purif Technol 2004. [DOI: 10.1016/j.seppur.2003.10.012] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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39
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40
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Malten M, Hollmann R, Deckwer WD, Jahn D. Production and secretion of recombinantLeuconostoc mesenteroides dextransucrase DsrS inBacillus megaterium. Biotechnol Bioeng 2004; 89:206-18. [PMID: 15593264 DOI: 10.1002/bit.20341] [Citation(s) in RCA: 72] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Leuconostoc mesenteroides dextransucrase DsrS was recombinantly produced in Bacillus megaterium and exported into the growth medium. For this purpose a plasmid-based xylose-inducible gene expression system was optimized via introduction of a multiple cloning site and an encoded optimal B. megaterium ribosome binding site. A cre mediating glucose-dependent catabolite repression was removed. Recombinant DsrS was found in the cytoplasm and exported via its native leader sequence into the growth medium. Elimination of the extracellular protease NprM increased extracellular DsrS concentrations by a factor of 4 and stabilized the recombinant protein for up to 12 h. Cultivation in a semi-defined medium resulted in a further doubling of extracellular DsrS concentration up to an activity of 65 Units/L. To develop an industrial process a high cell density cultivation of B. megaterium was established yielding cell dry weights of up to 80 g/L. After induction of dsrS expression high specific (362 Units/g) and volumetric (28,600 Units/L) activities of dextran free DsrS were measured. However, using high cell density cultivation, most DsrS was found cell-associated indicating current limitations of the production process. A protease accessibility assay identified the major limitation of DsrS production at the level of protein folding. Intracellular misfolding of DsrS hampered DsrS export via the SEC pathway at high cell densities. The subsequent use of a semi-defined mineral medium and the induction of DsrS production at lower cell densities increased protein export efficiency remarkably, but also led to extracellular DsrS aggregation. Further optimization strategies for the production of recombinant DsrS in B. megaterium are discussed.
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Affiliation(s)
- Marco Malten
- Institute of Microbiology, Technical University Braunschweig, Spielmannstrasse 7, D-38106 Braunschweig, Germany
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41
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Richard G, Morel S, Willemot RM, Monsan P, Remaud-Simeon M. Glucosylation of alpha-butyl- and alpha-octyl-D-glucopyranosides by dextransucrase and alternansucrase from Leuconostoc mesenteroides. Carbohydr Res 2003; 338:855-64. [PMID: 12681910 DOI: 10.1016/s0008-6215(03)00070-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
For the first time, glucosylation of alpha-butyl- and alpha-octylglucopyranoside was achieved using dextransucrase (DS) of various specificities, and alternansucrase (AS) from Leuconostoc mesenteroides. All the glucansucrases (GS) tested used alpha-butylglucopyranoside as acceptor; in particular, DS produced alpha-D-glucopyranosyl-(1-->6)-O-butyl-alpha-D-glucopyranoside and alpha-D-glucopyranosyl-(1-->6)-alpha-D-glucopyranosyl-(1-->6)-O-butyl-alpha-D-glucopyranoside. In contrast, alpha-octylglucopyranoside was glucosylated only by AS which was shown to be the most efficient catalyst. The conversion rates, obtained with this enzyme at sucrose to acceptor molar ratio of 2:1 reached 81 and 61% for alpha-butylglucopyranoside and alpha-octylglucopyranoside, respectively. Analyses obtained from liquid chromatography coupled with mass spectrometry revealed that different series of alpha-alkylpolyglucopyranosides regioisomers of increasing polymerization degree can be formed depending on the specificity of the catalyst.
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Affiliation(s)
- Gaëtan Richard
- Département de Génie Biochimique et Alimentaire, Centre de Bioingénierie Gilbert Durand, UMR CNRS 5504, UMR INRA 792, INSA, 135 Avenue de Rangueil, 31077 Toulouse 4, France
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