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de Lederkremer RM, Giorgi ME, Agusti R. trans-Sialylation: a strategy used to incorporate sialic acid into oligosaccharides. RSC Chem Biol 2022; 3:121-139. [PMID: 35360885 PMCID: PMC8827155 DOI: 10.1039/d1cb00176k] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/20/2021] [Indexed: 01/02/2023] Open
Abstract
Sialic acid, as a component of cell surface glycoconjugates, plays a crucial role in recognition events. Efficient synthetic methods are necessary for the supply of sialosides in enough quantities for biochemical and immunological studies. Enzymatic glycosylations obviate the steps of protection and deprotection of the constituent monosaccharides required in a chemical synthesis. Sialyl transferases with CMP-Neu5Ac as an activated donor were used for the construction of α2-3 or α2-6 linkages to terminal galactose or N-acetylgalactosamine units. trans-Sialidases may transfer sialic acid from a sialyl glycoside to a suitable acceptor and specifically construct a Siaα2-3Galp linkage. The trans-sialidase of Trypanosoma cruzi (TcTS), which fulfills an important role in the pathogenicity of the parasite, is the most studied one. The recombinant enzyme was used for the sialylation of β-galactosyl oligosaccharides. One of the main advantages of trans-sialylation is that it circumvents the use of the high energy nucleotide. Easily available glycoproteins with a high content of sialic acid such as fetuin and bovine κ-casein-derived glycomacropeptide (GMP) have been used as donor substrates. Here we review the trans-sialidase from various microorganisms and describe their application for the synthesis of sialooligosaccharides.
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Affiliation(s)
- Rosa M de Lederkremer
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) Buenos Aires Argentina
| | - María Eugenia Giorgi
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) Buenos Aires Argentina
| | - Rosalía Agusti
- Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Universidad de Buenos Aires Buenos Aires Argentina
- CONICET - Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR) Buenos Aires Argentina
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2
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Agusti R, Gallo-Rodriguez C, de Lederkremer RM. Trypanosoma cruzi trans-sialidase. A tool for the synthesis of sialylated oligosaccharides. Carbohydr Res 2019; 479:48-58. [PMID: 31132642 DOI: 10.1016/j.carres.2019.05.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 05/07/2019] [Accepted: 05/15/2019] [Indexed: 12/14/2022]
Abstract
Cells are covered by a complex array of carbohydrates. Among them, sialosides are of key importance in intracellular adhesion, recognition and signaling. The need for structurally diverse sialosides impelled the search for efficient synthetic methods since their isolation from natural sources is a difficult task. The enzymatic approach obviates the need of a chemical synthesis for protecting or participating groups in the substrates. The trans-sialidase of Trypanosoma cruzi (TcTS) is highly stereospecific for the transfer of sialic acid from an α-sialylglycoside donor to a terminal β-galactopyranosyl unit in the acceptor substrate to form the α-Neu5Ac-(2 → 3)-β-D-Galp motif. The enzyme was cloned and easily available glycoproteins, e.g. fetuin, may be used as donors of sialic acid, constituting strong points for the scalability of TcTS-catalyzed reactions. This review outlines the preparative use of TcTS for the sialylation of oligosaccharides. A detailed description of the substrates used as sialic acid donors, the acceptor substrates and the methods employed to monitor the reaction is included.
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Affiliation(s)
- Rosalía Agusti
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - Carola Gallo-Rodriguez
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina
| | - Rosa M de Lederkremer
- Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Química Orgánica, Buenos Aires, Argentina; CONICET- Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Buenos Aires, Argentina.
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3
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Levin G, Gómez S, Glodowsky A, Cascone O, Hernáiz M. Two-step enzymatic strategy for the synthesis of a smart phenolic polymer and further immobilization of a β-galactosidase able to catalyze transglycosydation reaction. Int J Biol Macromol 2018; 117:264-270. [DOI: 10.1016/j.ijbiomac.2018.05.177] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/22/2018] [Accepted: 05/23/2018] [Indexed: 10/16/2022]
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4
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Bidart GN, Rodríguez-Díaz J, Palomino-Schätzlein M, Monedero V, Yebra MJ. Human milk and mucosal lacto- and galacto-N-biose synthesis by transgalactosylation and their prebiotic potential in Lactobacillus species. Appl Microbiol Biotechnol 2016; 101:205-215. [DOI: 10.1007/s00253-016-7882-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Revised: 09/07/2016] [Accepted: 09/20/2016] [Indexed: 12/14/2022]
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5
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Gómez S, Bayón C, Navarrete S, Guisán JM, Hernáiz MJ. Stabilization of β-Gal-3 ATCC 31382 on agarose gels: synthesis of β-(1→3) galactosides under sustainable conditions. RSC Adv 2016. [DOI: 10.1039/c6ra15670c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
β-Gal-3 was immobilized by multipoint covalent attachment on an agarose support. The derivative was characterized and usefully applied as a recoverable and reusable biocatalyst for the synthesis of β-(1 → 3) galactosides under sustainable conditions.
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Affiliation(s)
- Sara Gómez
- Department of Organic and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- Campus de Moncloa
- Madrid
| | - Carlos Bayón
- Department of Organic and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- Campus de Moncloa
- Madrid
| | - Sergio Navarrete
- Department of Organic and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- Campus de Moncloa
- Madrid
| | - José M. Guisán
- Biocatalysis Department
- Catalysis Institute-CSIC
- Campus UAM
- Spain
| | - María J. Hernáiz
- Department of Organic and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- Campus de Moncloa
- Madrid
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6
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Li L, Liu Y, Li T, Wang W, Yu Z, Ma C, Qu J, Zhao W, Chen X, Wang PG. Efficient chemoenzymatic synthesis of novel galacto-N-biose derivatives and their sialylated forms. Chem Commun (Camb) 2015; 51:10310-3. [PMID: 26023910 PMCID: PMC4498953 DOI: 10.1039/c5cc03746h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Galacto-N-biose (GNB) derivatives were efficiently synthesized from galactose derivatives via a one-pot two-enzyme system containing two promiscuous enzymes from Bifidobacterium infantis: a galactokinase (BiGalK) and a d-galactosyl-β1-3-N-acetyl-d-hexosamine phosphorylase (BiGalHexNAcP). Mono-sialyl and di-sialyl galacto-N-biose derivatives were then prepared using a one-pot two-enzyme system containing a CMP-sialic acid synthetase and an α2-3-sialyltransferase or an α2-6-sialyltransferase.
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Affiliation(s)
- Lei Li
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 300071, PR China
| | - Yonghui Liu
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 300071, PR China
| | - Tiehai Li
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Wenjun Wang
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 300071, PR China
| | - Zaikuan Yu
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Cheng Ma
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Jingyao Qu
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
| | - Wei Zhao
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy, Nankai University, Tianjin 300071, PR China
| | - Xi Chen
- Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA
| | - Peng G Wang
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA
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7
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Bayón C, Moracci M, Hernáiz MJ. A novel, efficient and sustainable strategy for the synthesis of α-glycoconjugates by combination of a α-galactosynthase and a green solvent. RSC Adv 2015. [DOI: 10.1039/c5ra09301e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Synthesis of glycoconjugates using an α-galactosynthase in green solvents.
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Affiliation(s)
- C. Bayón
- Department of Organic
- and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- 28040 Madrid
| | - M. Moracci
- Institute of Biosciences and Bioresources
- National Research Council of Italy, Naples
- 80131 Naples
- Italy
| | - M. J. Hernáiz
- Department of Organic
- and Pharmaceutical Chemistry
- Faculty of Pharmacy
- Complutense University of Madrid
- 28040 Madrid
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8
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Zeuner B, Jers C, Mikkelsen JD, Meyer AS. Methods for improving enzymatic trans-glycosylation for synthesis of human milk oligosaccharide biomimetics. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:9615-31. [PMID: 25208138 DOI: 10.1021/jf502619p] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Recently, significant progress has been made within enzymatic synthesis of biomimetic, functional glycans, including, for example, human milk oligosaccharides. These compounds are mainly composed of N-acetylglucosamine, fucose, sialic acid, galactose, and glucose, and their controlled enzymatic synthesis is a novel field of research in advanced food ingredient chemistry, involving the use of rare enzymes, which have until now mainly been studied for their biochemical significance, not for targeted biosynthesis applications. For the enzymatic synthesis of biofunctional glycans reaction parameter optimization to promote "reverse" catalysis with glycosidases is currently preferred over the use of glycosyl transferases. Numerous methods exist for minimizing the undesirable glycosidase-catalyzed hydrolysis and for improving the trans-glycosylation yields. This review provides an overview of the approaches and data available concerning optimization of enzymatic trans-glycosylation for novel synthesis of complex bioactive carbohydrates using sialidases, α-l-fucosidases, and β-galactosidases as examples. The use of an adequately high acceptor/donor ratio, reaction time control, continuous product removal, enzyme recycling, and/or the use of cosolvents may significantly improve trans-glycosylation and biocatalytic productivity of the enzymatic reactions. Protein engineering is also a promising technique for obtaining high trans-glycosylation yields, and proof-of-concept for reversing sialidase activity to trans-sialidase action has been established. However, the protein engineering route currently requires significant research efforts in each case because the structure-function relationship of the enzymes is presently poorly understood.
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Affiliation(s)
- Birgitte Zeuner
- Center for BioProcess Engineering, Department of Chemical and Biochemical Engineering, Technical University of Denmark , Building 229, DK-2800 Kgs. Lyngby, Denmark
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Rational design of a glycosynthase by the crystal structure of β-galactosidase from Bacillus circulans (BgaC) and its use for the synthesis of N-acetyllactosamine type 1 glycan structures. J Biotechnol 2014; 191:78-85. [PMID: 25034434 DOI: 10.1016/j.jbiotec.2014.07.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 07/01/2014] [Accepted: 07/04/2014] [Indexed: 11/20/2022]
Abstract
The crystal structure of β-galactosidase from Bacillus circulans (BgaC) was determined at 1.8Å resolution. The overall structure of BgaC consists of three distinct domains, which are the catalytic domain with a TIM-barrel structure and two all-β domains (ABDs). The main-chain fold and steric configurations of the acidic and aromatic residues at the active site were very similar to those of Streptococcus pneumoniae β(1,3)-galactosidase BgaC in complex with galactose. The structure of BgaC was used for the rational design of a glycosynthase. BgaC belongs to the glycoside hydrolase family 35. The essential nucleophilic amino acid residue has been identified as glutamic acid at position 233 by site-directed mutagenesis. Construction of the active site mutant BgaC-Glu233Gly gave rise to a galactosynthase transferring the sugar moiety from α-d-galactopyranosyl fluoride (αGalF) to different β-linked N-acetylglucosamine acceptor substrates in good yield (40-90%) with a remarkably stable product formation. Enzymatic syntheses with BgaC-Glu233Gly afforded the stereo- and regioselective synthesis of β1-3-linked key galactosides like galacto-N-biose or lacto-N-biose.
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10
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Li C, Kim YW. Characterization of a Galactosynthase Derived fromBacillus circulansβ-Galactosidase: Facile Synthesis ofD-Lacto- andD-Galacto-N-bioside. Chembiochem 2014; 15:522-6. [DOI: 10.1002/cbic.201300699] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Indexed: 11/10/2022]
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11
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Bayón C, Cortés Á, Berenguer J, Hernáiz MJ. Highly efficient enzymatic synthesis of Galβ-(1→3)-GalNAc and Galβ-(1→3)-GlcNAc in ionic liquids. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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12
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Bayón C, Cortés Á, Aires-Trapote A, Civera C, Hernáiz MJ. Highly efficient and regioselective enzymatic synthesis of β-(1→3) galactosides in biosolvents. RSC Adv 2013. [DOI: 10.1039/c3ra40860d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Schauer R, Kamerling JP. The Chemistry and Biology of Trypanosomal trans-Sialidases: Virulence Factors in Chagas Disease and Sleeping Sickness. Chembiochem 2011; 12:2246-64. [DOI: 10.1002/cbic.201100421] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Indexed: 11/10/2022]
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14
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Lau K, Yu H, Thon V, Khedri Z, Leon ME, Tran BK, Chen X. Sequential two-step multienzyme synthesis of tumor-associated sialyl T-antigens and derivatives. Org Biomol Chem 2011; 9:2784-9. [PMID: 21359399 DOI: 10.1039/c0ob01269f] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
A series of α2-3-sialylated β1-3-linked galactosides, including sialyl T-antigens, 3'-sialyl galacto-N-biose, 3'-sialyl lacto-N-biose, and their derivatives containing natural and non-natural sialic acid forms have been synthesized from simple monosaccharides using an efficient sequential two-step multienzyme approach.
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Affiliation(s)
- Kam Lau
- Department of Chemistry, University of California, One Shields Avenue, Davis, California, USA
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15
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Yu H, Thon V, Lau K, Cai L, Chen Y, Mu S, Li Y, Wang PG, Chen X. Highly efficient chemoenzymatic synthesis of β1-3-linked galactosides. Chem Commun (Camb) 2010; 46:7507-9. [PMID: 20830443 DOI: 10.1039/c0cc02850a] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel D-galactosyl-β1-3-N-acetyl-D-hexosamine phosphorylase cloned from Bifidobacterium infantis (BiGalHexNAcP) was used with a recombinant E. coli K-12 galactokinase (GalK) for efficient one-pot two-enzyme synthesis of T-antigens, galacto-N-biose (Galβ1-3GalNAc), lacto-N-biose (Galβ1-3GlcNAc), and their derivatives.
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Affiliation(s)
- Hai Yu
- Department of Chemistry, University of California, One Shields Avenue, Davis, California 95616, USA
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16
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Affiliation(s)
- Rosa M de Lederkremer
- Departamento de Quimica Organica, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
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17
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Liu XW, Xia C, Li L, Guan WY, Pettit N, Zhang HC, Chen M, Wang PG. Characterization and synthetic application of a novel beta1,3-galactosyltransferase from Escherichia coli O55:H7. Bioorg Med Chem 2009; 17:4910-5. [PMID: 19560364 DOI: 10.1016/j.bmc.2009.06.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2009] [Revised: 06/02/2009] [Accepted: 06/03/2009] [Indexed: 10/20/2022]
Abstract
A beta1,3-galactosyltransferase (WbgO) was identified in Escherichia coli O55:H7. Its function was confirmed by radioactive activity assay and structure analysis of the disaccharide synthesized with the recombinant enzyme. WbgO requires a divalent metal ion, either Mn(2+) or Mg(2+), for its activity and is active between pH 6.0-8.0 with a pH optimum of 7.0. N-acetylglucosamine (GlcNAc) and oligosaccharides with GlcNAc at the non-reducing end were shown to be its preferred substrates and it can be used for the synthesis of type 1 glycan chains from these substrates. Together with a recombinant bacterial GlcNAc-transferase, benzyl beta-lacto-N-tetraoside was synthesized with the purified WbgO to demonstrate the synthetic utility of WbgO.
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Affiliation(s)
- Xian-wei Liu
- National Glycoengineering Research Center and The State Key Laboratory of Microbial Technology, Shandong University, LuNeng Keji Dasha B 604, Shanda Nanlu 29-1, Jinan, Shandong 250100, China
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D’Almeida A, Ionata M, Tran V, Tellier C, Dion M, Rabiller C. An expeditious and efficient synthesis of β-d-galactopyranosyl-(1→3)-d-N-acetylglucosamine (lacto-N-biose) using a glycosynthase from Thermus thermophilus as a catalyst. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.05.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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19
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Kim YW, Chen H, Kim JH, Withers SG. Catalytic properties of a mutant β-galactosidase fromXanthomonas manihotisengineered to synthesize galactosyl-thio-β-1,3 and -β-1,4-glycosides. FEBS Lett 2006; 580:4377-81. [PMID: 16844121 DOI: 10.1016/j.febslet.2006.06.095] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2006] [Revised: 06/30/2006] [Accepted: 06/30/2006] [Indexed: 11/24/2022]
Abstract
The identity of the acid/base catalyst of the Family 35 beta-galactosidases from Xanthomonas manihotis (BgaX) has been confirmed as Glu184 by kinetic analysis of mutants modified at that position. The Glu184Ala mutant of BgaX is shown to function as an efficient thioglycoligase, which synthesises thiogalactosides with linkages to the 3 and 4 positions of glucosides and galactosides in high (>80%) yields. Kinetic analysis of the thioglycoligase reveals glycosyl donor K(m) values of 1.5-21 microM and glycosyl acceptor K(m) values from 180 to 500 microM. This mutant should be a valuable catalyst for the synthesis of metabolically stable analogues of this important glycosidic linkage.
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Affiliation(s)
- Young-Wan Kim
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada V6T 1Z1
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Schrader S, Tiralongo E, Paris G, Yoshino T, Schauer R. A nonradioactive 96-well plate assay for screening of trans-sialidase activity. Anal Biochem 2003; 322:139-47. [PMID: 14596820 DOI: 10.1016/j.ab.2003.07.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Trans-sialidase (E.C. 3.2.1.18) catalyzes the transfer of preferably alpha2,3-linked sialic acid to another glycan or glycoconjugate, forming a new alpha2,3 linkage to galactose or N-acetylgalactosamine. Here, we describe a nonradioactive 96-well plate fluorescence test for monitoring trans-sialidase activity with high sensitivity, specificity, and reproducibility using sialyllactose and 4-methylumbelliferyl-beta-D-galactoside as donor and acceptor substrates, respectively. The assay conditions were optimized using the trans-sialidase from Trypanosoma congolense and its general applicability was confirmed with recombinant trans-sialidase from Trypanosoma cruzi. Using this procedure, a large number of samples can be tested quickly and reliably, for instance in monitoring trans-sialidase during enzyme purification and the production of monoclonal antibodies, for enzyme characterization, and for identifying potential substrates and inhibitors. The trans-sialidase assay reported here was capable of detecting trans-sialidase activity in the low-mU range and may be a valuable tool in the search for further trans-sialidases in various biological systems.
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Affiliation(s)
- Silke Schrader
- Biochemisches Institut, Christian-Albrechts-Universität zu Kiel, 24098, Kiel, Germany.
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21
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Turnbull W, Harrison JA, Ravindranathan Kartha K, Schenkman S, Field RA. Observations on chemical and enzymatic approaches to α-2,3-sialylated octyl β-lactoside. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00265-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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