51
|
Martinez EA, Boer H, Koivula A, Samain E, Driguez H, Armand S, Cottaz S. Engineering chitinases for the synthesis of chitin oligosaccharides: Catalytic amino acid mutations convert the GH-18 family glycoside hydrolases into transglycosylases. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2011.09.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
52
|
Fungal chitinases: diversity, mechanistic properties and biotechnological potential. Appl Microbiol Biotechnol 2011; 93:533-43. [PMID: 22134638 PMCID: PMC3257436 DOI: 10.1007/s00253-011-3723-3] [Citation(s) in RCA: 170] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 10/27/2011] [Accepted: 11/08/2011] [Indexed: 12/15/2022]
Abstract
Chitin derivatives, chitosan and substituted chito-oligosaccharides have a wide spectrum of applications ranging from medicine to cosmetics and dietary supplements. With advancing knowledge about the substrate-binding properties of chitinases, enzyme-based production of these biotechnologically relevant sugars from biological resources is becoming increasingly interesting. Fungi have high numbers of glycoside hydrolase family 18 chitinases with different substrate-binding site architectures. As presented in this review, the large diversity of fungal chitinases is an interesting starting point for protein engineering. In this review, recent data about the architecture of the substrate-binding clefts of fungal chitinases, in connection with their hydrolytic and transglycolytic abilities, and the development of chitinase inhibitors are summarized. Furthermore, the biological functions of chitinases, chitin and chitosan utilization by fungi, and the effects of these aspects on biotechnological applications, including protein overexpression and autolysis during industrial processes, are discussed in this review.
Collapse
|
53
|
Park HS, Choi KH, Park YD, Park CS, Cha JH. Enzymatic Synthesis of Polyphenol Glycosides by Amylosucrase. ACTA ACUST UNITED AC 2011. [DOI: 10.5352/jls.2011.21.11.1631] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
54
|
Li DC, Li AN, Papageorgiou AC. Cellulases from thermophilic fungi: recent insights and biotechnological potential. Enzyme Res 2011; 2011:308730. [PMID: 22145076 PMCID: PMC3226318 DOI: 10.4061/2011/308730] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2011] [Revised: 09/05/2011] [Accepted: 09/07/2011] [Indexed: 11/24/2022] Open
Abstract
Thermophilic fungal cellulases are promising enzymes in protein engineering efforts aimed at optimizing industrial processes, such as biomass degradation and biofuel production. The cloning and expression in recent years of new cellulase genes from thermophilic fungi have led to a better understanding of cellulose degradation in these species. Moreover, crystal structures of thermophilic fungal cellulases are now available, providing insights into their function and stability. The present paper is focused on recent progress in cloning, expression, regulation, and structure of thermophilic fungal cellulases and the current research efforts to improve their properties for better use in biotechnological applications.
Collapse
Affiliation(s)
- Duo-Chuan Li
- Department of Environmental Biology, Shandong Agricultural University, Taian, Shandong 271018, China
| | | | | |
Collapse
|
55
|
Affiliation(s)
- Ryan M Schmaltz
- The Department of Chemistry and Skaggs Institute for Chemical Biology, 10550 North Torrey Pines Road, La Jolla, California 92037, USA
| | | | | |
Collapse
|
56
|
Lee J, Goodey NM. Catalytic contributions from remote regions of enzyme structure. Chem Rev 2011; 111:7595-624. [PMID: 21923192 DOI: 10.1021/cr100042n] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Jeeyeon Lee
- Department of Chemistry, 413 Wartik Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
| | | |
Collapse
|
57
|
|
58
|
Zakariassen H, Hansen MC, Jøranli M, Eijsink VGH, Sørlie M. Mutational Effects on Transglycosylating Activity of Family 18 Chitinases and Construction of a Hypertransglycosylating Mutant. Biochemistry 2011; 50:5693-703. [DOI: 10.1021/bi2002532] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Henrik Zakariassen
- Department of Chemistry Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway
| | - Mona Cecilie Hansen
- Department of Chemistry Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway
| | - Maje Jøranli
- Department of Chemistry Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway
| | - Vincent G. H. Eijsink
- Department of Chemistry Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway
| | - Morten Sørlie
- Department of Chemistry Biotechnology and Food Science, Norwegian University of Life Sciences, P.O. Box 5003, N-1432 Aas, Norway
| |
Collapse
|
59
|
Mena-Arizmendi A, Alderete J, Águila S, Marty A, Miranda-Molina A, López-Munguía A, Castillo E. Enzymatic fructosylation of aromatic and aliphatic alcohols by Bacillus subtilis levansucrase: Reactivity of acceptors. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.02.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
60
|
Rannes JB, Ioannou A, Willies SC, Grogan G, Behrens C, Flitsch SL, Turner NJ. Glycoprotein Labeling Using Engineered Variants of Galactose Oxidase Obtained by Directed Evolution. J Am Chem Soc 2011; 133:8436-9. [DOI: 10.1021/ja2018477] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Julie B. Rannes
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, Manchester, M1 7DN, U.K
| | - Avgousta Ioannou
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, Manchester, M1 7DN, U.K
| | - Simon C. Willies
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, Manchester, M1 7DN, U.K
| | - Gideon Grogan
- Department of Chemistry, University of York, York, YO10 5YW, U.K
| | - Carsten Behrens
- Department of Protein and Peptide Chemistry, Novo Nordisk A/S, Maaløv, Denmark
| | - Sabine L. Flitsch
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, Manchester, M1 7DN, U.K
| | - Nicholas J. Turner
- School of Chemistry, University of Manchester, Manchester Interdisciplinary Biocentre, Manchester, M1 7DN, U.K
| |
Collapse
|
61
|
Strohmeier GA, Pichler H, May O, Gruber-Khadjawi M. Application of Designed Enzymes in Organic Synthesis. Chem Rev 2011; 111:4141-64. [DOI: 10.1021/cr100386u] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Gernot A. Strohmeier
- Austrian Centre of Industrial Biotechnology, Petersgasse 14, A-8010 Graz, Austria
| | - Harald Pichler
- Austrian Centre of Industrial Biotechnology, Petersgasse 14, A-8010 Graz, Austria
- Institute of Molecular Biotechnology, Graz University of Technology, Petersgasse 14, A-8010 Graz, Austria
| | - Oliver May
- DSM—Innovative Synthesis BV, Geleen, P.O. Box 18, 6160 MD Geleen, The Netherlands
| | | |
Collapse
|
62
|
|
63
|
Wang LX. The Amazing Transglycosylation Activity of Endo-β-N-acetylglucosaminidases. TRENDS GLYCOSCI GLYC 2011; 23:33-52. [PMID: 25309039 DOI: 10.4052/tigg.23.33] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Major advances have been made in exploring the transglycosylation activity of endo-β-N-acetylglucosaminidases (ENGases) for synthetic purpose. The exploration of synthetic sugar oxazolines as donor substrates for the ENGase-catalyzed transglycosylation has expanded the substrate availability and significantly enhanced the overall transglycosylation efficiency. On the other hand, site-directed mutagenesis in combination with activity screening has led to the discovery of the first generation ENGase-based glycosynthases that can use highly active sugar oxazolines as substrates for transglycosylation but lack hydrolytic activity on the ground-state products. ENGases have shown amazing flexibility in transglycosylation and possess much broader substrate specificity than previously thought. Now the ENGase-based chemoenzymatic method has been extended to the synthesis of a range of complex carbohydrates, including homogeneous glycopeptides, glycoproteins carrying well-defined glycans, novel oligosaccharide clusters, unusually glycosylated natural products, and even polysaccharides. This article highlights recent advances related to ENGase-catalyzed transglycosylation with a focus on their synthetic potential.
Collapse
Affiliation(s)
- Lai-Xi Wang
- Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, Maryland 21201, USA, Tel: 410-706-4982
| |
Collapse
|
64
|
Gantt RW, Peltier-Pain P, Thorson JS. Enzymatic methods for glyco(diversification/randomization) of drugs and small molecules. Nat Prod Rep 2011; 28:1811-53. [DOI: 10.1039/c1np00045d] [Citation(s) in RCA: 194] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
|
65
|
Pérez X, Faijes M, Planas A. Artificial mixed-linked β-glucans produced by glycosynthase-catalyzed polymerization: tuning morphology and degree of polymerization. Biomacromolecules 2010; 12:494-501. [PMID: 21192641 DOI: 10.1021/bm1013537] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The glycosynthase derived from Bacillus licheniformis 1,3-1,4-β-glucanase was able to polymerize glycosyl fluoride donors (G4)(m)G3GαF (m = 0-2, G = Glcβ) leading to artificial mixed-linked β-glucans with regular sequences and variable β1,3 to β1,4 linkage ratios. With the E134A glycosynthase mutant, polymers had average molecular masses (M(w)) of 10-15 kDa. Whereas polymer 2 ([4G4G3G](n)) was an amorphous precipitate, the water-insoluble polymers 1 ([4G3G](n)) and 3 ([4G4G4G3G](n)) formed spherulites of 10-20 μm diameter. With the more active E134S glycosynthase mutant, polymerization led to high molecular mass polysaccharides, where M(w) was linearly dependent on enzyme concentration. Remarkably, a homo-polysaccharide [4G4G4G3G](n) with M(w) as high as 30.5 kDa (n ≈ 47) was obtained, which contained a small fraction of products up to 70 kDa, a value that is in the range of the molecular masses of low viscosity cereal 1,3-1,4-β-glucans, and among the largest products produced by a glycosynthase. Access to a range of novel tailor-made β-glucans through the glycosynthase technology will allow to evaluate the implications of polysaccharide fine structures in their physicochemical properties and their applications as biomaterials, as well as to provide valuable tools for biochemical characterization of β-glucan degrading enzymes and binding modules.
Collapse
Affiliation(s)
- Xavi Pérez
- Bioengineering Department, Institut Químic de Sarrià, Universitat Ramon Llull, Barcelona, Spain
| | | | | |
Collapse
|
66
|
Cobucci-Ponzano B, Zorzetti C, Strazzulli A, Carillo S, Bedini E, Corsaro MM, Comfort DA, Kelly RM, Rossi M, Moracci M. A novel α-d-galactosynthase from Thermotoga maritima converts β-d-galactopyranosyl azide to α-galacto-oligosaccharides. Glycobiology 2010; 21:448-56. [DOI: 10.1093/glycob/cwq177] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
67
|
Chavaroche AAE, van den Broek LAM, Springer J, Boeriu C, Eggink G. Analysis of the polymerization initiation and activity of Pasteurella multocida heparosan synthase PmHS2, an enzyme with glycosyltransferase and UDP-sugar hydrolase activity. J Biol Chem 2010; 286:1777-85. [PMID: 21084307 DOI: 10.1074/jbc.m110.136754] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Heparosan synthase catalyzes the polymerization of heparosan (-4GlcUAβ1-4GlcNAcα1-)(n) by transferring alternatively the monosaccharide units from UDP-GlcUA and UDP-GlcNAc to an acceptor molecule. Details on the heparosan chain initiation by Pasteurella multocida heparosan synthase PmHS2 and its influence on the polymerization process have not been reported yet. By site-directed mutagenesis of PmHS2, the single action transferases PmHS2-GlcUA(+) and PmHS2-GlcNAc(+) were obtained. When incubated together in the standard polymerization conditions, the PmHS2-GlcUA(+)/PmHS2-GlcNAc(+) showed comparable polymerization properties as determined for PmHS2. We investigated the first step occurring in heparosan chain initiation by the use of the single action transferases and by studying the PmHS2 polymerization process in the presence of heparosan templates and various UDP-sugar concentrations. We observed that PmHS2 favored the initiation of the heparosan chains when incubated in the presence of an excess of UDP-GlcNAc. It resulted in a higher number of heparosan chains with a lower average molecular weight or in the synthesis of two distinct groups of heparosan chain length, in the absence or in the presence of heparosan templates, respectively. These data suggest that PmHS2 transfers GlcUA from UDP-GlcUA moiety to a UDP-GlcNAc acceptor molecule to initiate the heparosan polymerization; as a consequence, not only the UDP-sugar concentration but also the amount of each UDP-sugar is influencing the PmHS2 polymerization process. In addition, it was shown that PmHS2 hydrolyzes the UDP-sugars, UDP-GlcUA being more degraded than UDP-GlcNAc. However, PmHS2 incubated in the presence of both UDP-sugars favors the synthesis of heparosan polymers over the hydrolysis of UDP-sugars.
Collapse
Affiliation(s)
- Anais A E Chavaroche
- Bioprocess Engineering Group, Wageningen University and Research Center, P.O. Box 8129, 6700 EV Wageningen, The Netherlands
| | | | | | | | | |
Collapse
|
68
|
Luley-Goedl C, Sawangwan T, Brecker L, Wildberger P, Nidetzky B. Regioselective O-glucosylation by sucrose phosphorylase: a promising route for functional diversification of a range of 1,2-propanediols. Carbohydr Res 2010; 345:1736-40. [DOI: 10.1016/j.carres.2010.05.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 05/12/2010] [Accepted: 05/22/2010] [Indexed: 12/31/2022]
|
69
|
Frank M, Schloissnig S. Bioinformatics and molecular modeling in glycobiology. Cell Mol Life Sci 2010; 67:2749-72. [PMID: 20364395 PMCID: PMC2912727 DOI: 10.1007/s00018-010-0352-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Revised: 03/08/2010] [Accepted: 03/11/2010] [Indexed: 12/11/2022]
Abstract
The field of glycobiology is concerned with the study of the structure, properties, and biological functions of the family of biomolecules called carbohydrates. Bioinformatics for glycobiology is a particularly challenging field, because carbohydrates exhibit a high structural diversity and their chains are often branched. Significant improvements in experimental analytical methods over recent years have led to a tremendous increase in the amount of carbohydrate structure data generated. Consequently, the availability of databases and tools to store, retrieve and analyze these data in an efficient way is of fundamental importance to progress in glycobiology. In this review, the various graphical representations and sequence formats of carbohydrates are introduced, and an overview of newly developed databases, the latest developments in sequence alignment and data mining, and tools to support experimental glycan analysis are presented. Finally, the field of structural glycoinformatics and molecular modeling of carbohydrates, glycoproteins, and protein-carbohydrate interaction are reviewed.
Collapse
Affiliation(s)
- Martin Frank
- Molecular Structure Analysis Core Facility-W160, Deutsches Krebsforschungszentrum (German Cancer Research Centre), 69120 Heidelberg, Germany.
| | | |
Collapse
|
70
|
Abstract
Glycans are ubiquitous components of all organisms. Efforts to elucidate glycan function and to understand how they are assembled and disassembled can reap benefits in fields ranging from bioenergy to human medicine. Significant advances in our knowledge of glycan biosynthesis and function are emerging, and chemical biology approaches are accelerating the pace of discovery. Novel strategies for assembling oligosaccharides, glycoproteins, and other glycoconjugates are providing access to critical materials for interrogating glycan function. Chemoselective reactions that facilitate the synthesis of glycan-substituted imaging agents, arrays, and materials are yielding compounds to interrogate and perturb glycan function and dysfunction. To complement these advances, small molecules are being generated that inhibit key glycan-binding proteins or biosynthetic enzymes. These examples illustrate how chemical glycobiology is providing new insight into the functional roles of glycans and new opportunities to interfere with or exploit these roles.
Collapse
Affiliation(s)
- Laura L Kiessling
- Department of Chemistry, University of Wisconsin-Madison, Wisconsin 53706, USA.
| | | |
Collapse
|
71
|
Kittl R, Withers SG. New approaches to enzymatic glycoside synthesis through directed evolution. Carbohydr Res 2010; 345:1272-9. [PMID: 20427037 DOI: 10.1016/j.carres.2010.04.002] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 04/02/2010] [Accepted: 04/03/2010] [Indexed: 11/26/2022]
Abstract
The expanding field of glycobiology requires tools for the synthesis of structurally defined oligosaccharides and glycoconjugates, while any potential therapeutic applications of sugar-based derivates would require access to substantial quantities of such compounds. Classical chemical approaches are not well suited for such large-scale syntheses, thus enzymatic approaches are sought. Traditional routes to the enzymatic assembly of oligosaccharides have involved the use of either Nature's own biosynthetic enzymes, the glycosyl transferases, or glycosidases run in transglycosylation mode. However, each approach has drawbacks that have limited its application. Glycosynthases are mutant glycosidases in which the catalytic nucleophile has been replaced by mutation, inactivating them as hydrolases. When used in conjunction with glycosyl fluorides of the opposite anomeric configuration to that of the substrate, these enzymes function as highly efficient transferases, frequently giving stoichiometric yields of products. Further improvements can be obtained through directed evolution of the gene encoding the enzyme in question, but this requires the ability to screen very large libraries of catalysts. In this review we survey new screening methods for the formation of glycosidic linkages using high-throughput techniques, such as FACS, chemical complementation, and robot-assisted ELISA assays. Enzymes were evolved to have higher catalytic activity with their natural substrates, to show altered substrate specificities or to be promiscuous for efficient application in oligosaccharide, glycolipid, and glycoprotein synthesis.
Collapse
Affiliation(s)
- Roman Kittl
- Centre for High-Throughput Biology, University of British Columbia, 2125 East Mall, Vancouver, BC, Canada V6T 1Z4
| | | |
Collapse
|
72
|
Jordan DB, Wagschal K. Properties and applications of microbial β-D-xylosidases featuring the catalytically efficient enzyme from Selenomonas ruminantium. Appl Microbiol Biotechnol 2010; 86:1647-58. [DOI: 10.1007/s00253-010-2538-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 03/02/2010] [Accepted: 03/03/2010] [Indexed: 11/28/2022]
|
73
|
Seibel J. Vom Gen zum Produkt: Maßgeschneiderte Oligosaccharide durch Substrat-, Enzym- und genetisches Engineering. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.200900138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
74
|
Gloster TM, Davies GJ. Glycosidase inhibition: assessing mimicry of the transition state. Org Biomol Chem 2010; 8:305-20. [PMID: 20066263 PMCID: PMC2822703 DOI: 10.1039/b915870g] [Citation(s) in RCA: 188] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Accepted: 09/30/2009] [Indexed: 12/15/2022]
Abstract
Glycoside hydrolases, the enzymes responsible for hydrolysis of the glycosidic bond in di-, oligo- and polysaccharides, and glycoconjugates, are ubiquitous in Nature and fundamental to existence. The extreme stability of the glycosidic bond has meant these enzymes have evolved into highly proficient catalysts, with an estimated 10(17) fold rate enhancement over the uncatalysed reaction. Such rate enhancements mean that enzymes bind the substrate at the transition state with extraordinary affinity; the dissociation constant for the transition state is predicted to be 10(-22) M. Inhibition of glycoside hydrolases has widespread application in the treatment of viral infections, such as influenza and HIV, lysosomal storage disorders, cancer and diabetes. If inhibitors are designed to mimic the transition state, it should be possible to harness some of the transition state affinity, resulting in highly potent and specific drugs. Here we examine a number of glycosidase inhibitors which have been developed over the past half century, either by Nature or synthetically by man. A number of criteria have been proposed to ascertain which of these inhibitors are true transition state mimics, but these features have only be critically investigated in a very few cases.
Collapse
Affiliation(s)
- Tracey M. Gloster
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5YW, UK. ; ; Fax: +44 1904 328266; Tel: +44 1904 328260
- Department of Chemistry, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Gideon J. Davies
- York Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5YW, UK. ; ; Fax: +44 1904 328266; Tel: +44 1904 328260
| |
Collapse
|
75
|
Vasur J, Kawai R, Jonsson KHM, Widmalm G, Engström Å, Frank M, Andersson E, Hansson H, Forsberg Z, Igarashi K, Samejima M, Sandgren M, Ståhlberg J. Synthesis of Cyclic β-Glucan Using Laminarinase 16A Glycosynthase Mutant from the Basidiomycete Phanerochaete chrysosporium. J Am Chem Soc 2010; 132:1724-30. [DOI: 10.1021/ja909129b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jonas Vasur
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Rie Kawai
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - K. Hanna M. Jonsson
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Göran Widmalm
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Åke Engström
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Martin Frank
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Evalena Andersson
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Henrik Hansson
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Zarah Forsberg
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Kiyohiko Igarashi
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Masahiro Samejima
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Mats Sandgren
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| | - Jerry Ståhlberg
- Department of Molecular Biology, Swedish University of Agricultural Sciences, POB 590, SE-754 21 Uppsala, Sweden, Department of Biomaterials Sciences, Graduate School for Agricultural and Life Sciences, The University of Tokyo, Japan, Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden, Department of Medical Biochemistry and Microbiology, Uppsala University, Uppsala, Sweden, and Molecular Structural Analysis, German Cancer Research Center, INF 280,
| |
Collapse
|
76
|
Clark NE, Garman SC. The 1.9 a structure of human alpha-N-acetylgalactosaminidase: The molecular basis of Schindler and Kanzaki diseases. J Mol Biol 2009; 393:435-47. [PMID: 19683538 PMCID: PMC2771859 DOI: 10.1016/j.jmb.2009.08.021] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 07/30/2009] [Accepted: 08/04/2009] [Indexed: 01/07/2023]
Abstract
alpha-N-acetylgalactosaminidase (alpha-NAGAL; E.C. 3.2.1.49) is a lysosomal exoglycosidase that cleaves terminal alpha-N-acetylgalactosamine residues from glycopeptides and glycolipids. In humans, a deficiency of alpha-NAGAL activity results in the lysosomal storage disorders Schindler disease and Kanzaki disease. To better understand the molecular defects in the diseases, we determined the crystal structure of human alpha-NAGAL after expressing wild-type and glycosylation-deficient glycoproteins in recombinant insect cell expression systems. We measured the enzymatic parameters of our purified wild-type and mutant enzymes, establishing their enzymatic equivalence. To investigate the binding specificity and catalytic mechanism of the human alpha-NAGAL enzyme, we determined three crystallographic complexes with different catalytic products bound in the active site of the enzyme. To better understand how individual defects in the alpha-NAGAL glycoprotein lead to Schindler disease, we analyzed the effect of disease-causing mutations on the three-dimensional structure.
Collapse
Affiliation(s)
- Nathaniel E Clark
- Department of Biochemistry and Molecular Biology, University of Massachusetts, Amherst, 01003, USA
| | | |
Collapse
|
77
|
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]
|
78
|
Muthana S, Cao H, Chen X. Recent progress in chemical and chemoenzymatic synthesis of carbohydrates. Curr Opin Chem Biol 2009; 13:573-81. [PMID: 19833544 DOI: 10.1016/j.cbpa.2009.09.013] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2009] [Revised: 08/28/2009] [Accepted: 09/05/2009] [Indexed: 12/12/2022]
Abstract
The important roles that carbohydrates play in biological processes and their potential application in diagnosis, therapeutics, and vaccine development have made them attractive synthetic targets. Despite ongoing challenges, tremendous progresses have been made in recent years for the synthesis of carbohydrates. The chemical glycosylation methods have become more sophisticated and the synthesis of oligosaccharides has become more predictable. Simplified one-pot glycosylation strategy and automated synthesis are increasingly used to obtain biologically important glycans. On the other hand, chemoenzymatic synthesis continues to be a powerful alternative for obtaining complex carbohydrates. This review highlights recent progress in chemical and chemoenzymatic synthesis of carbohydrates with a particular focus on the methods developed for the synthesis of oligosaccharides, polysaccharides, glycolipids, and glycosylated natural products.
Collapse
Affiliation(s)
- Saddam Muthana
- Department of Chemistry, One Shields Avenue, University of California, Davis, CA 95616, United States
| | | | | |
Collapse
|
79
|
Wang LX, Huang W. Enzymatic transglycosylation for glycoconjugate synthesis. Curr Opin Chem Biol 2009; 13:592-600. [PMID: 19766528 DOI: 10.1016/j.cbpa.2009.08.014] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2009] [Revised: 08/15/2009] [Accepted: 08/21/2009] [Indexed: 11/24/2022]
Abstract
Remarkable advances have been made in recent years in exploiting the transglycosylation activity of glycosidases and glycosynthase mutants for oligosaccharide and glycoconjugate synthesis. New glycosynthases were generated from retaining glycosidases, inverting glycosidases, and those that proceed in a mechanism of substrate-assisted catalysis. Directed evolution coupled with elegant screening methods has led to the discovery of an expanding number of glycosynthase mutants that show improved catalytic activity and/or altered substrate specificity. In particular, enzymatic transglycosylation strategy has been recently extended to the synthesis of complex glycoconjugates, including glycosphingolipids, N-glycoproteins, and other glycosylated natural products.
Collapse
Affiliation(s)
- Lai-Xi Wang
- Institute of Human Virology and Department of Biochemistry & Molecular Biology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
| | | |
Collapse
|
80
|
Shaikh FA, Randriantsoa M, Withers SG. Mechanistic Analysis of the Blood Group Antigen-Cleaving endo-β-Galactosidase from Clostridium perfringens. Biochemistry 2009; 48:8396-404. [DOI: 10.1021/bi900991h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fathima Aidha Shaikh
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver V6T 1Z1, Canada
| | - Mialy Randriantsoa
- Centre de Recherches sur les Macromolécules Végétales (CERMAV - CNRS), affiliated with Joseph Fourier University, BP 53, 38041 Grenoble Cedex 9, France
| | - Stephen G. Withers
- Department of Chemistry, 2036 Main Mall, University of British Columbia, Vancouver V6T 1Z1, Canada
| |
Collapse
|
81
|
Higgins MA, Whitworth GE, El Warry N, Randriantsoa M, Samain E, Burke RD, Vocadlo DJ, Boraston AB. Differential recognition and hydrolysis of host carbohydrate antigens by Streptococcus pneumoniae family 98 glycoside hydrolases. J Biol Chem 2009; 284:26161-73. [PMID: 19608744 DOI: 10.1074/jbc.m109.024067] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The presence of a fucose utilization operon in the Streptococcus pneumoniae genome and its established importance in virulence indicates a reliance of this bacterium on the harvesting of host fucose-containing glycans. The identities of these glycans, however, and how they are harvested is presently unknown. The biochemical and high resolution x-ray crystallographic analysis of two family 98 glycoside hydrolases (GH98s) from distinctive forms of the fucose utilization operon that originate from different S. pneumoniae strains reveal that one enzyme, the predominant type among pneumococcal isolates, has a unique endo-beta-galactosidase activity on the LewisY antigen. Altered active site topography in the other species of GH98 enzyme tune its endo-beta-galactosidase activity to the blood group A and B antigens. Despite their different specificities, these enzymes, and by extension all family 98 glycoside hydrolases, use an inverting catalytic mechanism. Many bacterial and viral pathogens exploit host carbohydrate antigens for adherence as a precursor to colonization or infection. However, this is the first evidence of bacterial endoglycosidase enzymes that are known to play a role in virulence and are specific for distinct host carbohydrate antigens. The strain-specific distribution of two distinct types of GH98 enzymes further suggests that S. pneumoniae strains may specialize to exploit host-specific antigens that vary from host to host, a factor that may feature in whether a strain is capable of colonizing a host or establishing an invasive infection.
Collapse
Affiliation(s)
- Melanie A Higgins
- Biochemistry and Microbiology, University of Victoria, Victoria, British Columbia V8W 3P6, Canada
| | | | | | | | | | | | | | | |
Collapse
|
82
|
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.
Collapse
|
83
|
Kelly RM, Dijkhuizen L, Leemhuis H. Starch and alpha-glucan acting enzymes, modulating their properties by directed evolution. J Biotechnol 2009; 140:184-93. [PMID: 19428713 DOI: 10.1016/j.jbiotec.2009.01.020] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2008] [Accepted: 01/29/2009] [Indexed: 11/25/2022]
Abstract
Starch is the major food reserve in plants and forms a large part of the daily calorie intake in the human diet. Industrially, starch has become a major raw material in the production of various products including bio-ethanol, coating and anti-staling agents. The complexity and diversity of these starch based industries and the demand for high quality end products through extensive starch processing, can only be met through the use of a broad range of starch and alpha-glucan modifying enzymes. The economic importance of these enzymes is such that the starch industry has grown to be the largest market for enzymes after the detergent industry. However, as the starch based industries expand and develop the demand for more efficient enzymes leading to lower production cost and higher quality products increases. This in turn stimulates interest in modifying the properties of existing starch and alpha-glucan acting enzymes through a variety of molecular evolution strategies. Within this review we examine and discuss the directed evolution strategies applied in the modulation of specific properties of starch and alpha-glucan acting enzymes and highlight the recent developments in the field of directed evolution techniques which are likely to be implemented in the future engineering of these enzymes.
Collapse
Affiliation(s)
- Ronan M Kelly
- Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute, Centre for Carbohydrate Bioprocessing, University of Groningen, Kerklaan 30, 9751 NN Haren, The Netherlands
| | | | | |
Collapse
|
84
|
Kitaoka M, Honda Y, Fushinobu S, Hidaka M, Katayama T, Yamamoto K. Conversion of inverting glycoside hydrolases into catalysts for synthesizing glycosides employing a glycosynthase strategy. TRENDS GLYCOSCI GLYC 2009. [DOI: 10.4052/tigg.21.23] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
85
|
Rakić B, Withers SG. Recent Developments in Glycoside Synthesis with Glycosynthases and Thioglycoligases. Aust J Chem 2009. [DOI: 10.1071/ch09059] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Glycosynthases are hydrolytically incompetent engineered glycosidases that catalyze the high-yielding synthesis of glycoconjugates from glycosyl fluoride donor substrates and appropriate acceptors. Glycosynthases from more than 10 glycoside hydrolase families have now been generated, allowing the synthesis of a wide range of oligosaccharides. Recent examples include glycosynthase-mediated syntheses of xylo-oligosaccharides, xyloglucans, glycolipids, and aryl glycosides. Glycosynthases have also now been generated from inverting glycosidases, increasing the range of enzyme scaffolds. Improvement of glycosynthase activity and broadening of specificity has been achieved through directed evolution approaches, and several novel high-throughput screens have been developed to allow this. Finally, metabolically stable glycoside analogues have been generated using another class of mutant glycosidases: thioglycoligases. Recent developments in all these aspects are discussed.
Collapse
|
86
|
Goedl C, Sawangwan T, Mueller M, Schwarz A, Nidetzky B. A High-Yielding Biocatalytic Process for the Production of 2-O-(α-D-glucopyranosyl)-sn-glycerol, a Natural Osmolyte and Useful Moisturizing Ingredient. Angew Chem Int Ed Engl 2008; 47:10086-9. [DOI: 10.1002/anie.200803562] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
87
|
Goedl C, Sawangwan T, Mueller M, Schwarz A, Nidetzky B. Ein effizienter biokatalytischer Herstellungsprozess für 2-O-(α-D-Glucopyranosyl)-sn-glycerin, einen natürlichen Osmolyt und feuchthaltenden Zusatzstoff. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200803562] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
88
|
Structural modeling of glucanase-substrate complexes suggests a conserved tyrosine is involved in carbohydrate recognition in plant 1,3-1,4-beta-D-glucanases. J Comput Aided Mol Des 2008; 22:915-23. [PMID: 18663584 DOI: 10.1007/s10822-008-9228-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2008] [Accepted: 07/08/2008] [Indexed: 10/21/2022]
Abstract
Glycosyl hydrolase family 16 (GHF16) truncated Fibrobacter succinogenes (TFs) and GHF17 barley 1,3-1,4-beta-D-glucanases (beta-glucanases) possess different structural folds, beta-jellyroll and (beta/alpha)8, although they both catalyze the specific hydrolysis of beta-1,4 glycosidic bonds adjacent to beta-1,3 linkages in mixed beta-1,3 and beta-1,4 beta-D-glucans or lichenan. Differences in the active site region residues of TFs beta-glucanase and barley beta-glucanase create binding site topographies that require different substrate conformations. In contrast to barley beta-glucanase, TFs beta-glucanase possesses a unique and compact active site. The structural analysis results suggest that the tyrosine residue, which is conserved in all known 1,3-1,4-beta-D-glucanases, is involved in the recognition of mixed beta-1,3 and beta-1,4 linked polysaccharide.
Collapse
|
89
|
Hellmuth H, Wittrock S, Kralj S, Dijkhuizen L, Hofer B, Seibel J. Engineering the Glucansucrase GTFR Enzyme Reaction and Glycosidic Bond Specificity: Toward Tailor-Made Polymer and Oligosaccharide Products. Biochemistry 2008; 47:6678-84. [DOI: 10.1021/bi800563r] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hendrik Hellmuth
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Sabine Wittrock
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Slavko Kralj
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Lubbert Dijkhuizen
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Bernd Hofer
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| | - Jürgen Seibel
- Department of Carbohydrate Technology, University of Braunschweig, Braunschweig, Germany, Division of Structural Biology and Department of Chemical Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany, and Centre for Carbohydrate Bioprocessing, TNO-University of Groningen, and Department of Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, Groningen, The Netherlands
| |
Collapse
|