1
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Meng S, Hettiarachchi IL, Bhetuwal BR, Thapa P, Zhu J. Stereoselective Synthesis of β-d-Manno-heptopyranoside via Cs 2CO 3-Mediated Anomeric O-Alkylation: Synthesis of a Tetrasaccharide Repeat Unit of Bacillus thermoaerophilus Surface-Layer Glycoprotein. J Org Chem 2022; 87:6588-6600. [PMID: 35537215 DOI: 10.1021/acs.joc.2c00168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Stereoselective synthesis of d-glycero- and l-glycero-β-d-mannoheptosides has been achieved by cesium carbonate-mediated β-selective anomeric O-alkylation of the corresponding d-mannoheptoses. In addition, this method has been utilized in the total synthesis of a tetrasaccharide repeat unit of Bacillus thermoaerophilus surface-layer glycoprotein.
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Affiliation(s)
- Shuai Meng
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Ishani Lakshika Hettiarachchi
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Bishwa Raj Bhetuwal
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Prakash Thapa
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
| | - Jianglong Zhu
- Department of Chemistry and Biochemistry and School of Green Chemistry and Engineering, The University of Toledo, 2801 W. Bancroft Street, Toledo, Ohio 43606, United States
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2
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Jain N, Tamura K, Déjean G, Van Petegem F, Brumer H. Orthogonal Active-Site Labels for Mixed-Linkage endo-β-Glucanases. ACS Chem Biol 2021; 16:1968-1984. [PMID: 33988963 DOI: 10.1021/acschembio.1c00063] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Small molecule irreversible inhibitors are valuable tools for determining catalytically important active-site residues and revealing key details of the specificity, structure, and function of glycoside hydrolases (GHs). β-glucans that contain backbone β(1,3) linkages are widespread in nature, e.g., mixed-linkage β(1,3)/β(1,4)-glucans in the cell walls of higher plants and β(1,3)glucans in yeasts and algae. Commensurate with this ubiquity, a large diversity of mixed-linkage endoglucanases (MLGases, EC 3.2.1.73) and endo-β(1,3)-glucanases (laminarinases, EC 3.2.1.39 and EC 3.2.1.6) have evolved to specifically hydrolyze these polysaccharides, respectively, in environmental niches including the human gut. To facilitate biochemical and structural analysis of these GHs, with a focus on MLGases, we present here the facile chemo-enzymatic synthesis of a library of active-site-directed enzyme inhibitors based on mixed-linkage oligosaccharide scaffolds and N-bromoacetylglycosylamine or 2-fluoro-2-deoxyglycoside warheads. The effectiveness and irreversibility of these inhibitors were tested with exemplar MLGases and an endo-β(1,3)-glucanase. Notably, determination of inhibitor-bound crystal structures of a human-gut microbial MLGase from Glycoside Hydrolase Family 16 revealed the orthogonal labeling of the nucleophile and catalytic acid/base residues with homologous 2-fluoro-2-deoxyglycoside and N-bromoacetylglycosylamine inhibitors, respectively. We anticipate that the selectivity of these inhibitors will continue to enable the structural and mechanistic analyses of β-glucanases from diverse sources and protein families.
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Affiliation(s)
- Namrata Jain
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Kazune Tamura
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Guillaume Déjean
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
| | - Filip Van Petegem
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
| | - Harry Brumer
- Michael Smith Laboratories, University of British Columbia, 2185 East Mall, Vancouver, British Columbia V6T 1Z4, Canada
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
- Department of Biochemistry and Molecular Biology, University of British Columbia, 2350 Health Sciences Mall, Vancouver, British Columbia V6T 1Z3, Canada
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3
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Uhrig ML, Mora Flores EW, Postigo A. Approaches to the Synthesis of Perfluoroalkyl-Modified Carbohydrates and Derivatives: Thiosugars, Iminosugars, and Tetrahydro(thio)pyrans. Chemistry 2021; 27:7813-7825. [PMID: 33462910 DOI: 10.1002/chem.202005229] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 01/06/2021] [Indexed: 12/11/2022]
Abstract
Fluoroalkyl-substituted carbohydrates play relevant roles in diverse areas such as supramolecular chemistry, glycoconjugation, liquid crystals, and surfactants, with direct applications as wetting, antifreeze, and coating agents. In light of these promising applications, new methodologies for the late-stage incorporation of fluoroalkyl RF groups into carbohydrates and derivatives are herein presented as they are relevant to the synthetic carbohydrate community. Previously reviewed protocols for the installation of RF groups onto carbohydrates and derivatives will be succinctly summarized in the light of the new achievements. Fluoroalkyl-substituted iminosugars, on the other hand, are also interesting glycomimetic derivatives with prominent roles as glycosidases and glycosyltransferases inhibitors, as has recently been demonstrated. Also, they positively contribute to the study of sugar-protein interactions and enzyme mechanisms. New advances in the syntheses of fluoroalkyl-substituted iminosugars will also be presented here.
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Affiliation(s)
- María Laura Uhrig
- Departamento de Química Orgánica, Universidad de Buenos Aires, Facultad de Ciencias ExactasyNaturales, Pabellón 2, Ciudad Universitaria, C1428EG, Buenos Aires, Argentina.,Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), CONICET- Universidad de Buenos Aires, CP1428, Buenos Aires, Argentina
| | - Erwin W Mora Flores
- Departamento de Química Orgánica, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Junín 954, CP1113-, Buenos Aires, Argentina
| | - Al Postigo
- Departamento de Química Orgánica, Universidad de Buenos Aires, Facultad de Farmacia y Bioquímica, Junín 954, CP1113-, Buenos Aires, Argentina
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4
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Hamala V, Červenková Šťastná L, Kurfiřt M, Cuřínová P, Dračínský M, Karban J. Synthesis of multiply fluorinated N-acetyl-D-glucosamine and D-galactosamine analogs via the corresponding deoxyfluorinated glucosazide and galactosazide phenyl thioglycosides. Beilstein J Org Chem 2021; 17:1086-1095. [PMID: 34093878 PMCID: PMC8144920 DOI: 10.3762/bjoc.17.85] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 04/27/2021] [Indexed: 11/23/2022] Open
Abstract
Multiple fluorination of glycostructures has emerged as an attractive way of modulating their protein affinity, metabolic stability, and lipophilicity. Here we described the synthesis of a series of mono-, di- and trifluorinated N-acetyl-ᴅ-glucosamine and ᴅ-galactosamine analogs. The key intermediates are the corresponding multiply fluorinated glucosazide and galactosazide thioglycosides prepared from deoxyfluorinated 1,6-anhydro-2-azido-β-ᴅ-hexopyranose precursors by ring-opening reaction with phenyl trimethylsilyl sulfide. Nucleophilic deoxyfluorination at C4 and C6 by reaction with DAST, thioglycoside hydrolysis and azide/acetamide transformation completed the synthesis.
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Affiliation(s)
- Vojtěch Hamala
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Lucie Červenková Šťastná
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Martin Kurfiřt
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 16628 Praha 6, Czech Republic
| | - Petra Cuřínová
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
| | - Martin Dračínský
- NMR Spectroscopy group, Institute of Organic Chemistry and Biochemistry of the CAS, Flemingovo náměstí 542/2, 16000 Praha, Czech Republic
| | - Jindřich Karban
- Department of Bioorganic Compounds and Nanocomposites, Institute of Chemical Process Fundamentals of the CAS, v. v. i., Rozvojová 135, 16502 Praha 6, Czech Republic
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5
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Linclau B, Ardá A, Reichardt NC, Sollogoub M, Unione L, Vincent SP, Jiménez-Barbero J. Fluorinated carbohydrates as chemical probes for molecular recognition studies. Current status and perspectives. Chem Soc Rev 2021; 49:3863-3888. [PMID: 32520059 DOI: 10.1039/c9cs00099b] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review provides an extensive summary of the effects of carbohydrate fluorination with regard to changes in physical, chemical and biological properties with respect to regular saccharides. The specific structural, conformational, stability, reactivity and interaction features of fluorinated sugars are described, as well as their applications as probes and in chemical biology.
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Affiliation(s)
- Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO171BJ, UK
| | - Ana Ardá
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain.
| | | | - Matthieu Sollogoub
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 place Jussieu, 75005 Paris, France
| | - Luca Unione
- Department of Chemical Biology and Drug Discovery, Utrecht Institute for Pharmaceutical Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Stéphane P Vincent
- Department of Chemistry, Laboratory of Bio-organic Chemistry, University of Namur (UNamur), B-5000 Namur, Belgium
| | - Jesús Jiménez-Barbero
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain. and Ikerbasque, Basque Foundation for Science, Maria Diaz de Haro 3, 48013 Bilbao, Spain and Department of Organic Chemistry II, Faculty of Science and Technology, UPV/EHU, 48940 Leioa, Spain
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6
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Liang L, Cao J, Wei TYW, Tsai MD, Vincent SP. Synthesis of a biotinylated heptose 1,7-bisphosphate analogue, a probe to study immunity and inflammation. Org Biomol Chem 2021; 19:4943-4948. [PMID: 33988211 DOI: 10.1039/d1ob00790d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
d-glycero-d-manno-Heptose-1β,7-bisphosphate (HBP) is a bacterial metabolite that can induce a TIFA-dependent innate immune response in mammals. It was recently discovered that after HBP enters into the cytoplasm of the host cell, it is transformed into ADP-heptose-7-phosphate, which then leads to ALPK1-TIFA-dependent inflammatory response. In order to provide a molecular tool allowing the discovery of the proteins involved in this novel inflammatory pathway, we designed and synthesized a biotinylated analogue of HBP. This chemical probe displays an anomeric β-phosphate and a phosphonate at the 7-position, and a d-configured 6-position to which is attached the biotin moiety. To do so, different synthetic strategies were explored and described in this report. Moreover, we demonstrated that the biotinylated version of HBP is still biologically active and can activate the NF-κB pathway in HEK293T cells.
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Affiliation(s)
- Lina Liang
- Bengbu Medical College, Bengbu, Anhui, China
| | - Jun Cao
- University of Namur (UNamur), NARILIS, Department of Chemistry, rue de Bruxelles 61, 5000 Namur, Belgium.
| | | | - Ming-Daw Tsai
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Stéphane P Vincent
- University of Namur (UNamur), NARILIS, Department of Chemistry, rue de Bruxelles 61, 5000 Namur, Belgium.
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7
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Richards SJ, Keenan T, Vendeville JB, Wheatley DE, Chidwick H, Budhadev D, Council CE, Webster CS, Ledru H, Baker AN, Walker M, Galan MC, Linclau B, Fascione MA, Gibson MI. Introducing affinity and selectivity into galectin-targeting nanoparticles with fluorinated glycan ligands. Chem Sci 2020; 12:905-910. [PMID: 34163856 PMCID: PMC8179109 DOI: 10.1039/d0sc05360k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Galectins are potential biomarkers and therapeutic targets. However, galectins display broad affinity towards β-galactosides meaning glycan-based (nano)biosensors lack the required selectivity and affinity. Using a polymer-stabilized nanoparticle biosensing platform, we herein demonstrate that the specificity of immobilised lacto-N-biose towards galectins can be ‘turned on/off’ by using site-specific glycan fluorination and in some cases reversal of specificity can be achieved. The panel of fluoro-glycans were obtained by a chemoenzymatic approach, exploiting BiGalK and BiGalHexNAcP enzymes from Bifidobacterium infantis which are shown to tolerate fluorinated glycans, introducing structural diversity which would be very laborious by chemical methods alone. These results demonstrate that integrating non-natural, fluorinated glycans into nanomaterials can encode unprecedented selectivity with potential applications in biosensing. A chemo-enzymatic site-specific fluorination strategy is employed to obtain glyco-nanoparticles with tuneable selectivity towards galectins.![]()
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Affiliation(s)
| | - Tessa Keenan
- Department of Chemistry, University of York Heslington York YO10 5DD UK
| | | | - David E Wheatley
- School of Chemistry, University of Southampton Highfield Southampton SO171BJ UK
| | - Harriet Chidwick
- Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Darshita Budhadev
- Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Claire E Council
- School of Chemistry, University of Southampton Highfield Southampton SO171BJ UK
| | - Claire S Webster
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Helene Ledru
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | | | - Marc Walker
- Department of Physics, University of Warwick CV4 7AL UK
| | - M Carmen Galan
- School of Chemistry, University of Bristol Cantock's Close Bristol BS8 1TS UK
| | - Bruno Linclau
- School of Chemistry, University of Southampton Highfield Southampton SO171BJ UK
| | - Martin A Fascione
- Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Matthew I Gibson
- Department of Chemistry, University of Warwick CV4 7AL UK .,Warwick Medical School, University of Warwick CV4 7AL UK
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8
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Wang J, Zhang Y, Zhu Y, Liu J, Chen Y, Cao X, Yang Y. Total Synthesis and Immunological Evaluation of the Tri-d-glycero-d-manno-heptose Antigen of the Lipopolysaccharide as a Vaccine Candidate against Helicobacter pylori. Org Lett 2020; 22:8780-8785. [DOI: 10.1021/acs.orglett.0c03105] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junchang Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yiyue Zhang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yirong Zhu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Junru Liu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yan Chen
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Xin Cao
- Zhongshan Hospital Institute of Clinical Science, Fudan University, Shanghai Medical College, 179 Fenglin Road, Shanghai 200032, China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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9
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Wang J, Rong J, Lou Q, Zhu Y, Yang Y. Synthesis of l- glycero- and d- glycero-d- manno-Heptose Building Blocks for Stereoselective Assembly of the Lipopolysaccharide Core Trisaccharide of Vibrio parahemolyticus O2. Org Lett 2020; 22:8018-8022. [PMID: 32991182 DOI: 10.1021/acs.orglett.0c02961] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthesis of bacterial cell surface l-glycero-d-manno-heptose (l,d-Hep)- and d-glycero-d-manno-heptose (d,d-Hep)-containing higher carbon sugars is a challenging task. Here, we report a convenient and efficient approach for the synthesis of the l,d-Hep and d,d-Hep building blocks. Using l-lyxose and d-ribose as starting materials, this approach features diastereoselective Mukaiyama-type aldol reactions as the key steps. On the basis of the synthetic l,d-Hep and d,d-Hep building blocks, we achieved the first stereoselective synthesis of the unique α-l,d-Hep-(1→3)-α-d,d-Hep-(1→5)-α-Kdo core trisaccharide of the lipopolysaccharide of Vibrio parahemolyticus O2.
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Affiliation(s)
- Junchang Wang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Jingjing Rong
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Qixin Lou
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yirong Zhu
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - You Yang
- Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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10
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Liang L, Wade Wei T, Wu P, Herrebout W, Tsai M, Vincent SP. Nonhydrolyzable Heptose Bis‐ and Monophosphate Analogues Modulate Pro‐inflammatory TIFA‐NF‐κB Signaling. Chembiochem 2020; 21:2982-2990. [DOI: 10.1002/cbic.202000319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Indexed: 12/12/2022]
Affiliation(s)
- Lina Liang
- University of Namur (UNamur), NARILIS Department of Chemistry rue de Bruxelles 61 5000 Namur Belgium
| | - Tong‐You Wade Wei
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Pei‐Yu Wu
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Wouter Herrebout
- University of Antwerp Department of Chemistry MolSpec Research group Groenenborgerlaan 171 2020 Antwerpen Belgium
| | - Ming‐Daw Tsai
- Academia Sinica Institute of Biological Chemistry 128, Academia Road Section 2, Nankang 11529 Taipei Taiwan
| | - Stéphane P. Vincent
- University of Namur (UNamur), NARILIS Department of Chemistry rue de Bruxelles 61 5000 Namur Belgium
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11
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Fluorinated Galactoses Inhibit Galactose-1-Phosphate Uridyltransferase and Metabolically Induce Galactosemia-like Phenotypes in HEK-293 Cells. Cells 2020; 9:cells9030607. [PMID: 32138379 PMCID: PMC7140460 DOI: 10.3390/cells9030607] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/19/2020] [Accepted: 02/27/2020] [Indexed: 01/24/2023] Open
Abstract
Genetic defects of human galactose-1-phosphate uridyltransferase (hGALT) and the partial loss of enzyme function result in an altered galactose metabolism with serious long-term developmental impairment of organs in classic galactosemia patients. In search for cellular pathomechanisms induced by the stressor galactose, we looked for ways to induce metabolically a galactosemia-like phenotype by hGALT inhibition in HEK293 cells. In kinetic studies, we provide evidence for 2-fluorinated galactose-1-phosphate (F-Gal-1-P) to competitively inhibit recombinant hGALT with a KI of 0.9 mM. Contrasting with hepatic cells, no alterations of N-glycoprofiles in MIG (metabolic induction of galactosemia)-HEK293 cells were revealed for an inducible secretory netrin-1 probe by MALDI-MS. Differential fluorescence-activated cell sorting demonstrated reduced surface expression of N-glycosylated CD109, EGFR, DPP4, and rhMUC1. Membrane raft proteomes exhibited dramatic alterations pointing to an affection of the unfolded protein response, and of targeted protein traffick. Most prominent, a negative regulation of oxidative stress was revealed presumably as a response to a NADPH pool depletion during reduction of Gal/F-Gal. Cellular perturbations induced by fluorinated galactoses in normal epithelial cells resemble proteomic changes revealed for galactosemic fibroblasts. In conclusion, the metabolic induction of galactosemia-like phenotypes in healthy epithelial/neuronal cells could support studies on the molecular pathomechanisms in classic galactosemia, in particular under conditions of low galactose stress and residual GALT activity.
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12
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Cote JM, Hecht CJS, Patel KR, Ramirez-Mondragon CA, Sham YY, Taylor EA. Opposites Attract: Escherichia coli Heptosyltransferase I Conformational Changes Induced by Interactions between the Substrate and Positively Charged Residues. Biochemistry 2020; 59:3135-3147. [PMID: 32011131 DOI: 10.1021/acs.biochem.9b01005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gram-negative bacterial viability is greatly reduced by the disruption of heptose sugar addition during the biosynthesis of lipopolysaccharide (LPS), an important bacterial outer membrane component. Heptosyltransferase I (HepI), a member of the GT-B structural subclass of glycosyltransferases, is therefore an essential enzyme for the biosynthesis of the LPS. The disruption of HepI also increases the susceptibility of bacteria to hydrophobic antibiotics, making HepI a potential target for drug development. In this work, the structural and dynamic properties of the catalytic cycle of HepI are explored. Previously, substrate-induced stabilization of HepI was observed and hypothesized to be assisted by interactions between the substrate and residues located on dynamic loops. Herein, positively charged amino acids were probed to identify binding partners of the negatively charged phosphates and carboxylates of Kdo2-lipid A and its analogues. Mutant enzymes were characterized to explore changes in enzymatic activities and protein stability. Molecular modeling of HepI in the presence and absence of ligands was then performed with the wild type and mutant enzyme to allow determination of the relative change in substrate binding affinity resulting from each mutation. Together, these studies suggest that multiple residues are involved in mediating substrate binding, and a lack of additivity of these effects illustrates the functional redundancy of these binding interactions. The redundancy of residues mediating conformational transitions in HepI illustrates the evolutionary importance of these structural rearrangements for catalysis. This work enhances the understanding of HepI's protein dynamics and mechanism and is a model for improving our understanding of glycosyltransferase enzymes.
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Affiliation(s)
- Joy M Cote
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Cody J S Hecht
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Kaelan R Patel
- Department of Integrative Biology and Physiology, Medical School, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Carlos A Ramirez-Mondragon
- Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Yuk Y Sham
- Department of Integrative Biology and Physiology, Medical School, University of Minnesota, Minneapolis, Minnesota 55455, United States.,Bioinformatics and Computational Biology Program, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Erika A Taylor
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
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13
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Uhrig ML, Lantaño B, Postigo A. Synthetic strategies for fluorination of carbohydrates. Org Biomol Chem 2019; 17:5173-5189. [DOI: 10.1039/c9ob00405j] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Different synthetic strategies for accomplishing regio- and stereoselective fluorinations of carbohydrate scaffolds are discussed in light of the biological implications arising from such substitutions.
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Affiliation(s)
- María Laura Uhrig
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Orgánica
- C1428EG Buenos Aires
- Argentina
| | - Beatriz Lantaño
- Departmento de Química Orgánica
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires
- Junin 954 CP1113-Buenos Aires
- Argentina
| | - Al Postigo
- Departmento de Química Orgánica
- Facultad de Farmacia y Bioquímica
- Universidad de Buenos Aires
- Junin 954 CP1113-Buenos Aires
- Argentina
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14
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Mestre J, Lishchynskyi A, Castillón S, Boutureira O. Trifluoromethylation of Electron-Rich Alkenyl Iodides with Fluoroform-Derived "Ligandless" CuCF 3. J Org Chem 2018; 83:8150-8160. [PMID: 29916255 DOI: 10.1021/acs.joc.8b00927] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We herein present a flexible approach for the incorporation of CF3 units into a predefined site of electron-rich alkenes that exploits the regiocontrolled introduction of an iodine handle and subsequent trifluoromethylation of the C(sp2)-I bond using fluoroform-derived "ligandless" CuCF3. The broad substrate scope and functional group tolerance together with the scalability and purity of the resulting products enabled the controlled, late-stage synthesis of single regioisomers of complex CF3-scaffolds, such as sugars, nucleosides (antivirals), and heterocycles (indoles and chromones), with potential for academic and industrial applications.
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Affiliation(s)
- Jordi Mestre
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel·lí Domingo 1 , 43007 Tarragona , Spain.,Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology (BIST) , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Anton Lishchynskyi
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology (BIST) , Av. Països Catalans 16 , 43007 Tarragona , Spain
| | - Sergio Castillón
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Omar Boutureira
- Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , C/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
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15
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Kim JK, Jang HA, Kim MS, Cho JH, Lee J, Di Lorenzo F, Sturiale L, Silipo A, Molinaro A, Lee BL. The lipopolysaccharide core oligosaccharide of Burkholderia plays a critical role in maintaining a proper gut symbiosis with the bean bug Riptortus pedestris. J Biol Chem 2017; 292:19226-19237. [PMID: 28972189 DOI: 10.1074/jbc.m117.813832] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/14/2017] [Indexed: 12/26/2022] Open
Abstract
Lipopolysaccharide, the outer cell-wall component of Gram-negative bacteria, has been shown to be important for symbiotic associations. We recently reported that the lipopolysaccharide O-antigen of Burkholderia enhances the initial colonization of the midgut of the bean bug, Riptortus pedestris However, the midgut-colonizing Burkholderia symbionts lack the O-antigen but display the core oligosaccharide on the cell surface. In this study, we investigated the role of the core oligosaccharide, which directly interacts with the host midgut, in the Riptortus-Burkholderia symbiosis. To this end, we generated the core oligosaccharide mutant strains, ΔwabS, ΔwabO, ΔwaaF, and ΔwaaC, and determined the chemical structures of their oligosaccharides, which exhibited different compositions. The symbiotic properties of these mutant strains were compared with those of the wild-type and O-antigen-deficient ΔwbiG strains. Upon introduction into Riptortus via the oral route, the core oligosaccharide mutant strains exhibited different rates of colonization of the insect midgut. The symbiont titers in fifth-instar insects revealed significantly reduced population sizes of the inner core oligosaccharide mutant strains ΔwaaF and ΔwaaC These two strains also negatively affected host growth rate and fitness. Furthermore, R. pedestris individuals colonized with the ΔwaaF and ΔwaaC strains were vulnerable to septic bacterial challenge, similar to insects without a Burkholderia symbiont. Taken together, these results suggest that the core oligosaccharide from Burkholderia symbionts plays a critical role in maintaining a proper symbiont population and in supporting the beneficial effects of the symbiont on its host in the Riptortus-Burkholderia symbiosis.
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Affiliation(s)
- Jiyeun Kate Kim
- From the Department of Microbiology, Kosin University College of Medicine, Busan 49267, South Korea
| | - Ho Am Jang
- the Global Research Laboratory, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Min Seon Kim
- the Global Research Laboratory, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Jae Hyun Cho
- the Global Research Laboratory, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Junbeom Lee
- the Global Research Laboratory, College of Pharmacy, Pusan National University, Busan 46241, South Korea
| | - Flaviana Di Lorenzo
- the Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, Napoli 80126, Italy, and
| | - Luisa Sturiale
- the CNR-Istituto per i Polimeri, Compositi e Biomateriali IPCB, Via P. Gaifami 18, Catania 95126, Italy
| | - Alba Silipo
- the Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, Napoli 80126, Italy, and
| | - Antonio Molinaro
- the Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte S. Angelo, Via Cintia 4, Napoli 80126, Italy, and
| | - Bok Luel Lee
- the Global Research Laboratory, College of Pharmacy, Pusan National University, Busan 46241, South Korea,
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16
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Fu H, Pan W, Vincent SP. Pyruvate-Kinase-Coupled Glycosyltransferase Assays: Limitations, Struggles and Problem Resolution. Chembiochem 2017; 18:2129-2136. [PMID: 28857455 DOI: 10.1002/cbic.201700326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Indexed: 12/21/2022]
Abstract
Enzyme assays involving coupled pyruvate kinase (PK) have been used for many years to monitor the activity of major classes of enzymes including glycosyltransferases. Numerous potent inhibitors have been discovered and kinetically characterized thanks to this technology. However, when inhibitors of these important enzymes are screened, PK inhibitors or activators are very often observed. In this study we report solutions to resolve the problems encountered either during the screening or during the kinetic characterization of glycosyltransferase inhibitors by means of PK-coupled assays. The enzyme under study-WaaC-is an important glycosyltransferase involved in the bacterial lipopolysaccharide (LPS) biosynthesis pathway. Firstly we showed that alternative kinases such as nucleoside 5-diphosphate kinase (NDPK), myokinase (MK), and ADPdependent hexokinase that catalyze similar reactions to PK are prone to the same troubles. Moreover, an ADP chemosensor was used as an alternative but the sensitivity was not sufficient to allow a proper screening. Finally, we found that a stepwise PK/luciferase assay resolved the problems encountered with PK inhibitors and that a WaaC HPLC assay allowed the identification of WaaC inhibitors acting as PK activators, thus allowing false positive and false negative results linked to the coupling to PK to be eliminated.
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Affiliation(s)
- Huixiao Fu
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Weidong Pan
- State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, 3491 Baijin Road, Guiyang, 550014, China
| | - Stéphane P Vincent
- University of Namur, Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
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17
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Synthesis of d - glycero - d - manno -heptose 1,7-bisphosphate (HBP) featuring a β-stereoselective bis-phosphorylation. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Frédéric CJM, Tikad A, Fu J, Pan W, Zheng RB, Koizumi A, Xue X, Lowary TL, Vincent SP. Synthesis of Unprecedented Sulfonylated Phosphono-exo-Glycals Designed as Inhibitors of the Three Mycobacterial Galactofuranose Processing Enzymes. Chemistry 2016; 22:15913-15920. [PMID: 27628709 DOI: 10.1002/chem.201603161] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Indexed: 11/06/2022]
Abstract
This study reports a new methodology to synthesize exo-glycals bearing both a sulfone and a phosphonate. This synthetic strategy provides a way to generate exo-glycals displaying two electron-withdrawing groups and was applied to eight different carbohydrates from the furanose and pyranose series. The Z/E configurations of these tetrasubstituted enol ethers could be ascertained using NMR spectroscopic techniques. Deprotection of an exo-glycal followed by an UMP (uridine monophosphate) coupling generated two new UDP (uridine diphosphate)-galactofuranose analogues. These two Z/E isomers were evaluated as inhibitors of UGM, GlfT1, and GlfT2, the three mycobacterial galactofuranose processing enzymes. Molecule 46-(E) is the first characterized inhibitor of GlfT1 reported to date and was also found to efficiently inhibit UGM in a reversible manner. Interestingly, GlfT2 showed a better affinity for the (Z) isomer. The three enzymes studied in the present work are not only interesting because, mechanistically, they are still the topic of intense investigations, but also because they constitute very important targets for the development of novel antimycobacterial agents.
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Affiliation(s)
- Christophe J-M Frédéric
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Abdellatif Tikad
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Jian Fu
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Weidong Pan
- The Key Laboratory of Chemistry for Natural Products of Guizhou Province, Chinese Academy of Sciences, 202, Sha-chong South Road, Guiyang, 550002, P. R. China
| | - Ruixiang B Zheng
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Gunning-Lemieux Chemistry Centre, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Akihiko Koizumi
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Gunning-Lemieux Chemistry Centre, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Xiaochao Xue
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Gunning-Lemieux Chemistry Centre, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Todd L Lowary
- Department of Chemistry and Alberta Glycomics Centre, University of Alberta, Gunning-Lemieux Chemistry Centre, 11227 Saskatchewan Drive, Edmonton, AB T6G 2G2, Canada
| | - Stéphane P Vincent
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium.
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19
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Multigram-scale synthesis of l,d-heptoside using a Fleming-Tamao oxidation promoted by mercuric trifluoroacetate. Carbohydr Res 2016; 432:71-5. [DOI: 10.1016/j.carres.2016.07.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Revised: 07/05/2016] [Accepted: 07/06/2016] [Indexed: 11/21/2022]
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20
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Tikad A, Fu H, Sevrain CM, Laurent S, Nierengarten JF, Vincent SP. Mechanistic Insight into Heptosyltransferase Inhibition by using Kdo Multivalent Glycoclusters. Chemistry 2016; 22:13147-55. [PMID: 27516128 DOI: 10.1002/chem.201602190] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2016] [Indexed: 12/27/2022]
Abstract
The synthesis of unprecedented multimeric Kdo glycoclusters based on fullerene and calix[4]arene central scaffolds is reported. The compounds were used to study the mechanism and scope of multivalent glycosyltransferase inhibition. Multimeric mannosides based on porphyrin and pillar[5]arenes were also generated in a controlled manner. Twelve glycoclusters and their monomeric ligands were thus assayed against heptosyltransferase WaaC, which is an important bacterial glycosyltransferase that is involved in lipopolysaccharide biosynthesis. It was first found that all the multimers interact solely with the acceptor binding site of the enzyme even when the multimeric ligands mimic the heptose donor. Second, the novel Kdo glycofullerenes displayed very potent inhibition (Ki =0.14 μm for the best inhibitor); an inhibition level rarely observed with glycosyltransferases. Although the observed "multivalent effects" (i.e., the enhancement of affinity of a ligand when presented in a multimeric fashion) were in general modest, a dramatic effect of the central scaffold on the inhibition level was evidenced: the fullerene and the porphyrin scaffolds being by far superior to the calix- and pillar-arenes. We could also show, by dynamic light scattering analysis, that the best inhibitor had the propensity to form aggregates with the heptosyltransferase. This aggregative property may contribute to the global multivalent enzyme inhibition, but probably do not constitute the main origin of inhibition.
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Affiliation(s)
- Abdellatif Tikad
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Huixiao Fu
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Charlotte M Sevrain
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium
| | - Sophie Laurent
- University of Mons (UMONS), Service de Chimie Générale, Organique et Biomédicale, Laboratoire de RMN et d'Imagerie Moléculaire, Avenue Maistriau 19, 7000, Mons, Blegium.,Center for Microscopy and Molecular Imaging (CMMI), Avenue Adrienne Bolland 8, 6041, Gosselies, Belgium
| | - Jean-François Nierengarten
- Laboratoire de Chimie des Matériaux Moléculaires, Université de Strasbourg et CNRS (UMR 7509), Ecole Européenne de Chimie, Polymères et Matériaux (ECPM), 25 rue Becquerel, 67087, Strasbourg Cedex 2, France
| | - Stéphane P Vincent
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, 5000, Namur, Belgium.
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21
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Wildberger P, Pfeiffer M, Brecker L, Nidetzky B. Diastereoselektive Synthese von Glykosylphosphaten mit einem Phosphorylase‐Phosphatase‐Kombikatalysator. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507710] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Patricia Wildberger
- Institut für Biotechnologie und Bioprozesstechnik, Technische Universität Graz, Petersgasse 12, 8010 Graz (Österreich)
| | - Martin Pfeiffer
- Institut für Biotechnologie und Bioprozesstechnik, Technische Universität Graz, Petersgasse 12, 8010 Graz (Österreich)
| | - Lothar Brecker
- Institut für Organische Chemie, Universität Wien, Währingerstraße 38, 1090 Wien (Österreich)
| | - Bernd Nidetzky
- Institut für Biotechnologie und Bioprozesstechnik, Technische Universität Graz, Petersgasse 12, 8010 Graz (Österreich)
- acib – Austrian Centre of Industrial Biotechnology (Österreich)
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22
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Wildberger P, Pfeiffer M, Brecker L, Nidetzky B. Diastereoselective Synthesis of Glycosyl Phosphates by Using a Phosphorylase-Phosphatase Combination Catalyst. Angew Chem Int Ed Engl 2015; 54:15867-71. [PMID: 26565075 PMCID: PMC4737314 DOI: 10.1002/anie.201507710] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Indexed: 11/10/2022]
Abstract
Sugar phosphates play an important role in metabolism and signaling, but also as constituents of macromolecular structures. Selective phosphorylation of sugars is chemically difficult, particularly at the anomeric center. We report phosphatase-catalyzed diastereoselective "anomeric" phosphorylation of various aldose substrates with α-D-glucose 1-phosphate, derived from phosphorylase-catalyzed conversion of sucrose and inorganic phosphate, as the phosphoryl donor. Simultaneous and sequential two-step transformations by the phosphorylase-phosphatase combination catalyst yielded glycosyl phosphates of defined anomeric configuration in yields of up to 70 % based on the phosphate applied to the reaction. An efficient enzyme-assisted purification of the glycosyl phosphate products from reaction mixtures was established.
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Affiliation(s)
- Patricia Wildberger
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12, 8010 Graz (Austria)
| | - Martin Pfeiffer
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12, 8010 Graz (Austria)
| | - Lothar Brecker
- Institute of Organic Chemistry, University of Vienna, Währingerstraße 38, 1090 Vienna (Austria)
| | - Bernd Nidetzky
- Institute of Biotechnology and Biochemical Engineering, Graz University of Technology, Petersgasse 12, 8010 Graz (Austria). .,acib - Austrian Centre of Industrial Biotechnology (Austria).
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23
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Mulani SK, Cheng KC, Mong KKT. General Homologation Strategy for Synthesis of l-glycero- and d-glycero-Heptopyranoses. Org Lett 2015; 17:5536-9. [DOI: 10.1021/acs.orglett.5b02620] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shaheen K. Mulani
- Applied Chemistry Department, National Chiao Tung University, 1001 University Road, Taiwan 300, R.O.C
| | - Kuang-Chun Cheng
- Applied Chemistry Department, National Chiao Tung University, 1001 University Road, Taiwan 300, R.O.C
| | - Kwok-Kong T. Mong
- Applied Chemistry Department, National Chiao Tung University, 1001 University Road, Taiwan 300, R.O.C
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24
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Mudapaka J, Taylor EA. Cloning and characterization of theEscherichia coliHeptosyltransferase III: Exploring substrate specificity in lipopolysaccharide core biosynthesis. FEBS Lett 2015; 589:1423-9. [DOI: 10.1016/j.febslet.2015.04.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/22/2015] [Accepted: 04/23/2015] [Indexed: 01/08/2023]
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25
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Vincent SP, Tikad A. β-Selective One-Pot Fluorophosphorylation ofd,d-Heptosylglycals Mediated by Selectfluor. Isr J Chem 2015. [DOI: 10.1002/ijch.201400148] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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26
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Li T, Tikad A, Pan W, Vincent SP. β-Stereoselective phosphorylations applied to the synthesis of ADP- and polyprenyl-β-mannopyranosides. Org Lett 2014; 16:5628-31. [PMID: 25312597 DOI: 10.1021/ol5026876] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient and convenient synthetic route to glycosyl 1-β-phosphates has been developed using diallyl chlorophosphate as a phosphorylating agent with 4-N,N-dimethylaminopyridine under mild conditions. Diallyl-glycosyl 1-β-phosphate triesters of D-manno, L-glycero-D-manno-hepto-, D-gluco-, D-galacto-, and L-fuco-pyranose as well as lactose have been obtained by this strategy in good yields and excellent β-selectivities. Furthermore, the diallyl 6-azido-mannosyl 1-β-phosphate 2 was deprotected under mild conditions and converted into potentially clickable analogues of β-mannosyl phosphoisoprenoids I and ADP-heptose II.
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Affiliation(s)
- Tianlei Li
- Département de Chimie, Laboratoire de Chimie Bio-Organique, University of Namur , rue de Bruxelles 61, B-5000 Namur, Belgium
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27
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Dumitrescu L, Eppe G, Tikad A, Pan W, El Bkassiny S, Gurcha SS, Ardá A, Jiménez-Barbero J, Besra GS, Vincent SP. Selectfluor and NFSI exo-glycal fluorination strategies applied to the enhancement of the binding affinity of galactofuranosyltransferase GlfT2 inhibitors. Chemistry 2014; 20:15208-15. [PMID: 25251918 DOI: 10.1002/chem.201404180] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Indexed: 12/31/2022]
Abstract
Two complementary methods for the synthesis of fluorinated exo-glycals have been developed, for which previously no general reaction had been available. First, a Selectfluor-mediated fluorination was optimized after detailed analysis of all the reaction parameters. A dramatic effect of molecular sieves on the course of the reaction was observed. The reaction was generalized with a set of biologically relevant furanosides and pyranosides. A second direct approach involving carbanionic chemistry and the use of N-fluorobenzenesulfonimide (NFSI) was performed and this method gave better diastereoselectivities. Assignment of the Z/E configuration of all the fluorinated exo-glycals was achieved based on the results of HOESY experiments. Furthermore, fluorinated exo-glycal analogues of UDP-galactofuranose were prepared and assayed against GlfT2, which is a key enzyme involved in the cell-wall biosynthesis of major pathogens. The fluorinated exo-glycals proved to be potent inhibitors as compared with a series of C-glycosidic analogues of UDP-Galf, thus demonstrating the double beneficial effect of the exocyclic enol ether functionality and the fluorine atom.
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Affiliation(s)
- Lidia Dumitrescu
- University of Namur (UNamur), Département de Chimie, Laboratoire de Chimie Bio-Organique rue de Bruxelles 61, B-5000 Namur (Belgium), Fax: (+32) 81-72-45-17
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28
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Sun Q, Li X, Sun J, Gong S, Liu G, Liu G. An improved P(V)-N activation strategy for the synthesis of nucleoside diphosphate 6-deoxy-l-sugars. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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29
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Tikad A, Vincent SP. Constrained 3,6-Anhydro-Heptosides: Synthesis by a DAST-Induced Debenzylative Reaction, and Reactivity Profile. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301071] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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30
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Durka M, Buffet K, Iehl J, Holler M, Nierengarten JF, Vincent SP. The Inhibition of Liposaccharide Heptosyltransferase WaaC with Multivalent Glycosylated Fullerenes: A New Mode of Glycosyltransferase Inhibition. Chemistry 2011; 18:641-51. [DOI: 10.1002/chem.201102052] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Indexed: 12/13/2022]
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31
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Durka M, Tikad A, Périon R, Bosco M, Andaloussi M, Floquet S, Malacain E, Moreau F, Oxoby M, Gerusz V, Vincent SP. Systematic Synthesis of Inhibitors of the Two First Enzymes of the Bacterial Heptose Biosynthetic Pathway: Towards Antivirulence Molecules Targeting Lipopolysaccharide Biosynthesis. Chemistry 2011; 17:11305-13. [DOI: 10.1002/chem.201100396] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Revised: 05/26/2011] [Indexed: 11/07/2022]
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Linclau B, Golten S, Light M, Sebban M, Oulyadi H. The conformation of tetrafluorinated methyl galactoside anomers: crystallographic and NMR studies. Carbohydr Res 2011; 346:1129-39. [PMID: 21531398 DOI: 10.1016/j.carres.2011.04.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2011] [Revised: 03/27/2011] [Accepted: 04/03/2011] [Indexed: 10/18/2022]
Abstract
The first single-crystal X-ray diffraction study of tetrafluorinated monosaccharide derivatives is presented. Both α- and β-methyl 2,3-dideoxy-2,2,3,3-tetrafluoro-d-galactopyranoside anomers adopt the (4)C(1) conformation. The values for the C1-O1 and C1-O5 bond lengths and the O5-C1-O1-CH(3) dihedral angles are in line with what can be expected from the anomeric and exo-anomeric effects. The chair conformations are slightly distorted, presumably due to repulsion between 1,3-diaxial C-O and C-F bonds. The asymmetric unit of both compounds contains up to three independent molecules, which differ in the conformation of the hydroxymethyl group (including in one case a 'forbidden'gg rotamer). The molecular packing of the β-anomer shows a clear segregation between fluorinated and hydrophilic domains, while for the α-anomer the regions of fluorine segregation are broken by interleafing of OMe groups. There is one close OH⋯F contact, which is likely to arise from the crystal packing. NMR studies show that the two anomers also adopt a (4)C(1) conformation in solution (D(2)O, CDCl(3)).
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Affiliation(s)
- Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton SO17 1BJ, United Kingdom.
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33
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Ioannou A, Cini E, Timofte RS, Flitsch SL, Turner NJ, Linclau B. Heavily fluorinated carbohydrates as enzyme substrates: oxidation of tetrafluorinated galactose by galactose oxidase. Chem Commun (Camb) 2011; 47:11228-30. [DOI: 10.1039/c1cc13956h] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Durka M, Buffet K, Iehl J, Holler M, Nierengarten JF, Taganna J, Bouckaert J, Vincent SP. The functional valency of dodecamannosylated fullerenes with Escherichia coli FimH—towards novel bacterial antiadhesives. Chem Commun (Camb) 2011; 47:1321-3. [DOI: 10.1039/c0cc04468g] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Durka M, Norberg B, Roué Y, Vincent SP, Wouters J. Phenyl 2,3,4-tri-O-benzyl-1-thio-α-d-mannopyran-oside monohydrate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o1525. [PMID: 21587775 PMCID: PMC3006854 DOI: 10.1107/s1600536810019604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Accepted: 05/25/2010] [Indexed: 11/23/2022]
Abstract
In the title compound, C33H34O5S·H2O, the mannopyranoside ring adopts a chair conformation with the 2-α-thiophenyl group occupying an axial position. One of the pendant benzyl groups is disordered over two sets of sites in a 0.5:0.5 ratio. In the crystal, the water molecule makes two O—H⋯O hydrogen bonds to an adjacent sugar molecule with the O atoms of the primary alcohol and ether groups acting as acceptors. At the same time, the OH group of the sugar makes a hydrogen bond to a water molecule.
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Affiliation(s)
- Maxime Durka
- Department of Chemistry, University of Namur, 61 Rue de Bruxelles, B-5000 Namur, Belgium
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Eppe G, Peltier P, Daniellou R, Nugier-Chauvin C, Ferrières V, Vincent SP. Probing UDP-galactopyranose mutase binding pocket: a dramatic effect on substitution of the 6-position of UDP-galactofuranose. Bioorg Med Chem Lett 2008; 19:814-6. [PMID: 19119008 DOI: 10.1016/j.bmcl.2008.12.014] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2008] [Revised: 12/03/2008] [Accepted: 12/03/2008] [Indexed: 11/16/2022]
Abstract
UDP-galactopyranose mutase (UGM) catalyzes the isomerization of UDP-galactopyranose (UDP-Galp) into UDP-galactofuranose (UDP-Galf), an essential step of the mycobacterial cell wall biosynthesis. UDP-(6-deoxy-6-fluoro)-D-galactofuranose 1 was tested as substrate of UGM. Turnover could be observed by HPLC. The k(cat) (7.4s(-1)) and the K(m) (24 mM) of 1 were thus measured and compared with those of UDP-Galf and other fluorinated analogs. The presence of the fluorine atom at the 6-position had a moderate effect on the rate of the reaction but a huge one on the interactions between the enzyme and its substrate. This result demonstrated that key interactions occur at the vicinity of the 6-position of UDP-galactose in the Michaelis complex.
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Affiliation(s)
- Guillaume Eppe
- University of Namur (FUNDP), Département de Chimie, Laboratoire de Chimie Bio-Organique, rue de Bruxelles 61, B-5000 Namur, Belgium
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