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Ding M, Qin C, Sun W, Tian G, Zou X, Hu J, Yin J. Chemical Synthesis of a Densely Functionalized Aminodisaccharide from Fusobacterium nucleatum ATCC 23726 O-Antigen. Org Lett 2024; 26:4142-4146. [PMID: 38717147 DOI: 10.1021/acs.orglett.4c01344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Fusobacterium nucleatum, a colorectal-cancer-associated oncomicrobe, can trigger or accelerate numerous pathologies. We report the first synthesis of a conjugation-ready disaccharide containing six amino groups from F. nucleatum ATCC 23726 O-antigen. Rare 2,3-diamido-d-glucuronic acid amide and 2-acetamido-4-amino-d-fucose were synthesized from d-glucosamine through configuration inversion, nucleophilic substitution, C6 oxidation, and C6 deoxygenation. A judicious choice of protecting groups and reaction conditions enabled the selective installation of N-acetyl, N-propanoyl, N-formyl, and carboxamido groups.
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Affiliation(s)
- Meiru Ding
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Chunjun Qin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Wenbin Sun
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Guangzong Tian
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Xiaopeng Zou
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Jing Hu
- Wuxi School of Medicine, Jiangnan University, Wuxi 214122, China
| | - Jian Yin
- Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology & School of Life Sciences and Health Engineering, Jiangnan University, Wuxi 214122, China
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Calderon AD, Zhou J, Guan W, Wu Z, Guo Y, Bai J, Li Q, Wang PG, Fang J, Li L. An enzymatic strategy to asymmetrically branched N-glycans. Org Biomol Chem 2018; 15:7258-7262. [PMID: 28832049 DOI: 10.1039/c7ob01765k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
An enzymatic strategy was developed to generate asymmetrically branched N-glycans from natural sources by using a panel of glycosidases and glycosyltransferases. Briefly, LacZ β-galactosidase was employed to selectively trim symmetrically branched N-glycans isolated from bovine fetuin. The yielding structures were then converted to asymmetrically branched core structures by robust glycosyltransferase for further extension.
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Affiliation(s)
- Angie D Calderon
- Department of Chemistry and Center for Diagnostics & Therapeutics, Georgia State University, Atlanta, GA 30303, USA.
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Janoš P, Kozmon S, Tvaroška I, Koca J. Three-dimensional homology model of GlcNAc-TV glycosyltransferase. Glycobiology 2016; 26:757-771. [PMID: 26821880 DOI: 10.1093/glycob/cww010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/22/2016] [Indexed: 11/14/2022] Open
Abstract
The enzyme UDP-N-acetylglucosamine: α-d-mannoside β-1-6 N-acetylglucosaminyltransferase V (GnT-V) catalyzes the transfer of GlcNAc from the UDP-GlcNAc donor to the α-1-6-linked mannose of the trimannosyl core structure of glycoproteins to produce the β-1-6-linked branching of N-linked oligosaccharides. β-1-6-GlcNAc-branched N-glycans are associated with cancer growth and metastasis. Therefore, the inhibition of GnT-V represents a key target for anti-cancer drug development. However, the development of potent and specific inhibitors of GnT-V is hampered by the lack of information on the three-dimensional structure of the enzyme and on the binding characteristics of its substrates. Here we present the first 3D structure of GnT-V as a result of homology modeling. Various alignment methods, docking the donor and acceptor substrates, and molecular dynamics simulation were used to construct seven homology models of GnT-V and characterize the binding of its substrates. The best homology model is consistent with available experimental data. The three-dimensional model, the structure of the enzyme catalytic site and binding information obtained for the donor and acceptor can be useful in studies of the catalytic mechanism and design of inhibitors of GnT-V.
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Affiliation(s)
- Pavel Janoš
- Central European Institute of Technology (CEITEC).,Faculty of Science-National Centre for Biomolecular Research, Masaryk University, Brno, Czech Republic
| | - Stanislav Kozmon
- Central European Institute of Technology (CEITEC).,Faculty of Science-National Centre for Biomolecular Research, Masaryk University, Brno, Czech Republic.,Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Igor Tvaroška
- Central European Institute of Technology (CEITEC).,Institute of Chemistry, Slovak Academy of Sciences, Bratislava, Slovak Republic
| | - Jaroslav Koca
- Central European Institute of Technology (CEITEC).,Faculty of Science-National Centre for Biomolecular Research, Masaryk University, Brno, Czech Republic
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4
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Macnaughtan MA, Kamar M, Alvarez-Manilla G, Venot A, Glushka J, Pierce JM, Prestegard JH. NMR structural characterization of substrates bound to N-acetylglucosaminyltransferase V. J Mol Biol 2006; 366:1266-81. [PMID: 17204285 PMCID: PMC1808497 DOI: 10.1016/j.jmb.2006.12.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2006] [Revised: 12/06/2006] [Accepted: 12/07/2006] [Indexed: 10/23/2022]
Abstract
N-Acetylglucosaminyltransferase V (GnT-V) is an enzyme involved in the biosynthesis of asparagine-linked oligosaccharides. It is responsible for the transfer of N-acetylglucosamine (GlcNAc) from the nucleotide sugar donor, uridine 5'-diphospho-N-acetylglucosamine (UDP-GlcNAc), to the 6 position of the alpha-1-6 linked Man residue in N-linked oligosaccharide core structures. GnT-V up-regulation has been linked to increased cancer invasiveness and metastasis and, appropriately, targeted for drug development. However, drug design is impeded by the lack of structural information on the protein and the way in which substrates are bound. Even though the catalytic domain of this type II membrane protein can be expressed in mammalian cell culture, obtaining structural information has proved challenging due to the size of the catalytic domain (95 kDa) and its required glycosylation. Here, we present an experimental approach to obtaining information on structural characteristics of the active site of GnT-V through the investigation of the bound conformation and relative placement of its ligands, UDP-GlcNAc and beta-D-GlcpNAc-(1-->2)-alpha-D-Manp-(1-->6)-beta-D-GlcpOOctyl. Nuclear magnetic resonance (NMR) spectroscopy experiments, inducing transferred nuclear Overhauser effect (trNOE) and saturation transfer difference (STD) experiments, were used to characterize the ligand conformation and ligand-protein contact surfaces. In addition, a novel paramagnetic relaxation enhancement experiment using a spin-labeled ligand analogue, 5'-diphospho-4-O-2,2,6,6-tetramethylpiperidine 1-oxyl (UDP-TEMPO), was used to characterize the relative orientation of the two bound ligands. The structural information obtained for the substrates in the active site of GnT-V can be useful in the design of inhibitors for GnT-V.
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Ma Z, Zhang J, Kong F. Concise syntheses of β-GlcNAcp-(1→6)-α-Manp-(1→6)-Manp and its dimer, and β-GlcNAcp-(1→2)-α-Manp-(1→6)-Manp. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s0957-4166(03)00570-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qian X, Hindsgaul O, Li H, Palcic MM. Unexpected Enzymatic Fucosylation of the Hindered Tertiary Alcohol of 3-C-Methyl-N-Acetyllactosamine Produces a Novel Analogue of the LeX-Trisaccharide. J Am Chem Soc 1998. [DOI: 10.1021/ja973361w] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiangping Qian
- Department of Chemistry, University of Alberta Edmonton, Alberta T6G 2G2, Canada
| | - Ole Hindsgaul
- Department of Chemistry, University of Alberta Edmonton, Alberta T6G 2G2, Canada
| | - Hong Li
- Department of Chemistry, University of Alberta Edmonton, Alberta T6G 2G2, Canada
| | - Monica M. Palcic
- Department of Chemistry, University of Alberta Edmonton, Alberta T6G 2G2, Canada
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Du M, Hindsgaul O. Recognition of beta-D-Gal p-(1-->3)-beta-D-Glc pNAc-OR acceptor analogues by the Lewis alpha-(1-->3/4)-fucosyltransferase from human milk. Carbohydr Res 1996; 286:87-105. [PMID: 8925514 DOI: 10.1016/0008-6215(96)00047-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The Lewis alpha-(1-->3/4)-fucosyltransferase (E.C. 2.4.1.65) transfers L-fucose from GDP-fucose to OH-4 of the Glc pNAc residue in the disaccharide beta-D-Galp-(1-->3)-beta-D-Glc pNAc-OR [R = (CH2)8COOMe] (1) to give the Lewis-A blood group determinant beta-D-Gal p-(1-->3)-[alpha-L-Fuc p-(1-->4)]-beta-D-Glc pNAc-OR. Five deoxy analogous of 1, as well as its N-propionyl derivative, were chemically synthesized and kinetically evaluated as both substrates and inhibitors for the enzyme from human milk. The unmodified acceptor 1 had Km = 640 microM with Vmax set arbitrarily to 100. The 6-deoxy (Km = 400 microM, V(max) = 90) and N-propionyl compounds (Km = 330 microM, V(max) = 170) remained excellent substrates while the 4-deoxy compound was a very weak competitive inhibitor with Ki = 9 mM. Deoxygenation of OH-2' and OH-4'(of the Gal residue) in 1 had little effect on the activity. The OH-6 group of the Gal residue proved to be critical for recognition by the enzyme since substitution of this group with hydrogen led to an inactive compound.
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Affiliation(s)
- M Du
- Department of Chemistry, University of Alberta, Edmonton, Canada
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9
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Khan SH, Matta KL. Synthesis of 2-acetamido-2-deoxy-beta-D-glucopyranosyl-(1-->2)-alpha-D- mannopyranosyl-(1-->6)-beta-D-mannopyranosyl-(1-->4)-2-acetamido-2-d eox y-D-glucopyranose. Acceptor-substrate recognition by N-acetylglucosaminyltransferase-V (GnT-V). Carbohydr Res 1995; 278:351-62. [PMID: 8590449 DOI: 10.1016/0008-6215(95)00257-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- S H Khan
- Department of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, NY 14263, USA
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10
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Barresi F, Hindsgaul O. Chemically Synthesized Oligosaccharides, 1994. A Searchable Table of Glycosidic Linkages. J Carbohydr Chem 1995. [DOI: 10.1080/07328309508005396] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Brockhausen I, Reck F, Kuhns W, Khan S, Matta KL, Meinjohanns E, Paulsen H, Shah RN, Baker MA, Schachter H. Substrate specificity and inhibition of UDP-GlcNAc:GlcNAc beta 1-2Man alpha 1-6R beta 1,6-N-acetylglucosaminyltransferase V using synthetic substrate analogues. Glycoconj J 1995; 12:371-9. [PMID: 7496152 DOI: 10.1007/bf00731340] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
UDP-GlcNAc:GlcNAc beta 1-2Man alpha 1-6R (GlcNAc to Man) beta 1,6- N-acetylglucosaminyltransferase V (GlcNAc-T V) adds a GlcNAc beta 1-6 branch to bi- and triantennary N-glycans. An increase in this activity has been associated with cellular transformation, metastasis and differentiation. We have used synthetic substrate analogues to study the substrate specificity and inhibition of the partially purified enzyme from hamster kidney and of extracts from hen oviduct membranes and acute myeloid leukaemia leukocytes. All compounds with the minimum structure GlcNAc beta 1-2Man alpha 1-6Glc/Man beta-R were good substrates for GlcNAc-T V. The presence of structural elements other than the minimum trisaccharide structure affected GlcNAc-T V activity without being an absolute requirement for activity. Substrates with a biantennary structure were preferred over linear fragments of biantennary structures. Kinetic analysis showed that the 3-hydroxyl of the Man alpha 1-3 residue and the 4-hydroxyl of the Man beta- residue of the Man alpha 1-6(Man alpha 1-3)Man beta-R N-glycan core are not essential for catalysis but influence substrate binding. GlcNAc beta 1-2(4,6-di-O-methyl-)Man alpha 1-6Glc beta-pnp was found to be an inhibitor of GlcNAc-T V from hamster kidney, hen oviduct microsomes and acute and chronic myeloid leukaemia leukocytes.
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Affiliation(s)
- I Brockhausen
- Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
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