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Paulovičová E, Paulovičová L, Poláková M. Glycolipids mimicking biosurfactants of the synthetic origin as new immunomodulating and anticandidal derivatives. Carbohydr Res 2023; 534:108978. [PMID: 37944383 DOI: 10.1016/j.carres.2023.108978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 10/25/2023] [Accepted: 10/31/2023] [Indexed: 11/12/2023]
Abstract
The immunobiological effectivity of glycolipids mimicking biosurfactants of the synthetic origin was followed up using macrophages cell line RAW264.7. These derivatives with different number of mannose units connected glycosidically or through triazole linker, and all having octyl aglycone, were evaluated with respect to their structure - immunomodulation activity relationship. This comparative study showed that the structural variations of the selected derivatives influenced the immunobiological cell behaviour as concerned pro-inflammatory TNF-α, IL-6, IL-1α, IL-17, IL-12 and anti-inflammatory IL-10 cytokines production and enhancement of RAW264.7 cell proliferation. The derivatives with mannose units linked through triazole linkers exerted in some cases stronger immunomodulative potency than (di)mannosides. On the other hand, a presence of triazole linker is a less favourable for an effective candidacidal activity as determined by in vitro using Candida albicans biofilm. The design of new defined immunomodulating formulas of the synthetic origin as possible antifungal agents and prospective participants in drug delivery systems may be of interest.
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Affiliation(s)
- Ema Paulovičová
- Dept.Glycomaterials, Immunol. & Cell Culture Labs, Center for Glycomics, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia.
| | - Lucia Paulovičová
- Dept.Glycomaterials, Immunol. & Cell Culture Labs, Center for Glycomics, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia
| | - Monika Poláková
- Dept. of Glycochemistry, Lab. Sugars & Glycomimics, Center for Glycomics, Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 84538, Bratislava, Slovakia.
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2
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Abstract
![]()
Fluorinated
carbohydrates have found many applications in the glycosciences.
Typically, these contain fluorination at a single position. There
are not many applications involving polyfluorinated carbohydrates,
here defined as monosaccharides in which more than one carbon has
at least one fluorine substituent directly attached to it, with the
notable exception of their use as mechanism-based inhibitors. The
increasing attention to carbohydrate physical properties, especially
around lipophilicity, has resulted in a surge of interest for this
class of compounds. This review covers the considerable body of work
toward the synthesis of polyfluorinated hexoses, pentoses, ketosugars,
and aminosugars including sialic acids and nucleosides. An overview
of the current state of the art of their glycosidation is also provided.
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Affiliation(s)
- Kler Huonnic
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K
| | - Bruno Linclau
- School of Chemistry, University of Southampton, Highfield, Southampton, SO17 1BJ, U.K.,Department of Organic and Macromolecular Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-S4, Ghent, 9000, Belgium
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3
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Serbian I, Prell E, Fischer C, Deigner HP, Csuk R. n-Propyl 6-amino-2,6-dideoxy-2,2-difluoro-β-d-glucopyranoside is a good inhibitor for the β-galactosidase from E. coli. Med Chem Res 2021; 30:1099-1107. [PMID: 33716475 PMCID: PMC7934981 DOI: 10.1007/s00044-021-02715-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2020] [Accepted: 02/17/2021] [Indexed: 01/25/2023]
Abstract
A convenient route has been developed for the synthesis of novel 6-amino-2,2-(or 3,3-difluoro)-2-(or 3),6-dideoxy-hexopyranoses. Biological screening showed these compounds as good inhibitors for several glycosidases. Especially n-propyl 6-amino-2,6-dideoxy-2,2-difluoro-β-d-glucopyranoside (8) was an excellent competitive inhibitor for the β-galactosidase from E. coli holding a Ki of 0.50 μM. ![]()
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Affiliation(s)
- Immo Serbian
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes_Str. 2, D-06120 Halle (Saale), Germany
| | - Erik Prell
- Department of Radiation Medicine, Section of Nuclear Medicine, University Hospital Halle (Saale), Ernst-Grube Str. 40, D-06120 Halle (Saale), Germany
| | - Claudia Fischer
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes_Str. 2, D-06120 Halle (Saale), Germany
| | - Hans-Peter Deigner
- Medical and Life Sciences Faculty, Furtwangen University, Jakob-Kienzle Str. 17, D-78054 Villingen-Schwenningen, Germany
| | - René Csuk
- Martin-Luther-University Halle-Wittenberg, Organic Chemistry, Kurt-Mothes_Str. 2, D-06120 Halle (Saale), Germany
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4
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Affiliation(s)
- Zachary A. Morrison
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
| | - Mark Nitz
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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5
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Delbrouck JA, Bochatay VN, Tikad A, Vincent SP. Regioselective Synthesis of Difluorinated C-Furanosides Involving a Debenzylative Cycloetherification. Org Lett 2019; 21:5562-5566. [PMID: 31273996 DOI: 10.1021/acs.orglett.9b01878] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A highly regioselective synthesis of valuable gem-difluorinated C-furanosides from unprotected aldoses via a debenzylative cycloetherification (DBCE) reaction induced by diethylaminosulfur trifluoride is descibed. The scope and limitations of this DBCE reaction are described using a series of commercially available pentoses and hexoses to afford, without selective protection/deprotection sequences, the corresponding gem-difluorinated C-furanosides in moderate to good yields.
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Affiliation(s)
- Julien A Delbrouck
- University of Namur , Département de Chimie, Laboratoire de Chimie Bio-Organique , rue de Bruxelles 61 , B-5000 Namur , Belgium
| | - Valentin N Bochatay
- University of Namur , Département de Chimie, Laboratoire de Chimie Bio-Organique , rue de Bruxelles 61 , B-5000 Namur , Belgium
| | - Abdellatif Tikad
- Laboratoire de Chimie Moléculaire et Substances Naturelles, Faculté des Sciences , Université Moulay Ismail , B.P. 11201, Zitoune , Meknès 50050 , Morocco
| | - Stéphane P Vincent
- University of Namur , Département de Chimie, Laboratoire de Chimie Bio-Organique , rue de Bruxelles 61 , B-5000 Namur , Belgium
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6
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7
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Affiliation(s)
- Weijia Xie
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 P. R. China
| | - Jinyi Xu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 P. R. China
| | - Xiaoming Wu
- State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 P. R. China
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8
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Tikad A, Delbrouck JA, Vincent SP. Debenzylative Cycloetherification: An Overlooked Key Strategy for Complex Tetrahydrofuran Synthesis. Chemistry 2016; 22:9456-76. [DOI: 10.1002/chem.201600655] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Indexed: 01/22/2023]
Affiliation(s)
- Abdellatif Tikad
- University of Namur (UNamur); Département de Chimie; Laboratoire de Chimie Bio-Organique; rue de Bruxelles 61 5000 Namur Belgium
| | - Julien A. Delbrouck
- University of Namur (UNamur); Département de Chimie; Laboratoire de Chimie Bio-Organique; rue de Bruxelles 61 5000 Namur Belgium
| | - 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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9
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Cordero FM, Vurchio C, Faggi C, Brandi A. Configuration-guided reactions: the case of highly decorated spiro[cyclopropane-1,2′(3′H)-pyrrolo[1,2-b]isoxazole] derivatives en route to polyhydroxyindolizidines. Org Chem Front 2016. [DOI: 10.1039/c6qo00410e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The formation of structurally differentiated indolizidinones is guided by a diverse behaviour of spirocyclopropaneisoxazolidine precursors under fluorination reactions.
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Affiliation(s)
- F. M. Cordero
- Department of Chemistry ‘Ugo Schiff’
- University of Firenze
- 50019 Sesto Fiorentino
- Italy
| | - C. Vurchio
- Department of Chemistry ‘Ugo Schiff’
- University of Firenze
- 50019 Sesto Fiorentino
- Italy
| | - C. Faggi
- Department of Chemistry ‘Ugo Schiff’
- University of Firenze
- 50019 Sesto Fiorentino
- Italy
| | - A. Brandi
- Department of Chemistry ‘Ugo Schiff’
- University of Firenze
- 50019 Sesto Fiorentino
- Italy
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10
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Zhang Q, Huang L, Zhang C, Xie P, Zhang Y, Ding S, Xu F. Synthesis and biological activity of polyprenols. Fitoterapia 2015; 106:184-93. [PMID: 26358482 DOI: 10.1016/j.fitote.2015.09.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 11/26/2022]
Abstract
The polyprenols and their derivatives are highlighted in this study. These lipid linear polymers of isoprenoid residues are widespread in nature from bacteria to human cells. This review primarily presents the synthesis and biological activities of polyprenyl derivatives. Attention is focused on the synthesis and biological activity of dolichols, polyprenyl ester derivatives and polyprenyl amines. Other polyprenyl derivatives, such as oxides of polyprenols, aromatic polyprenols, polyprenyl bromide and polyprenyl sulphates, are mentioned. It is noted that polyprenyl phosphates and polyprenyl-linked glycosylation have better antibacterial, gene therapy and immunomodulating performance, whereas polyprenyl amines have better for antibacterial and antithrombotic activity. Dolichols, polyprenyl acetic esters, polyprenyl phosphates and polyprenyl-linked glycosylation have pharmacological anti-tumour effects. Finally, the postulated prospect of polyprenols and their derivatives are discussed. Further in vivo studies on the above derivatives are needed. The compatibility of polyprenols and their derivatives with other drugs should be studied, and new preparations of polyprenyl derivatives, such as hydrogel glue and release-controlled drugs, are suggested for future research and development.
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Affiliation(s)
- Qiong Zhang
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China; Beijing Forestry University, Beijing 100083, China
| | - Lixin Huang
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China.
| | - Caihong Zhang
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China
| | - Pujun Xie
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China
| | - Yaolei Zhang
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China
| | - Shasha Ding
- Institute of Chemical Industry of Forest Products, CAF, Nanjing, Jiangsu Province 210042, China; National Engineering Lab. for Biomass Chemical Utilization, Key and Open lab. of Forest Chemical Engineering, SFA, Nanjing, Jiangsu Province 210042, China; Key Lab. of Biomass Energy and Material, Nanjing, Jiangsu Province 210042, China
| | - Feng Xu
- Beijing Forestry University, Beijing 100083, China
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11
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Tamigney Kenfack M, Blériot Y, Gauthier C. Intramolecular Aglycon Delivery Enables the Synthesis of 6-Deoxy-β-d-manno-heptosides as Fragments of Burkholderia pseudomallei and Burkholderia mallei Capsular Polysaccharide. J Org Chem 2014; 79:4615-34. [DOI: 10.1021/jo500640n] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Marielle Tamigney Kenfack
- Université de Poitiers, Institut de Chimie IC2MP, UMR-CNRS 7285, Équipe Synthèse Organique, 4 rue Michel
Brunet, 86073 Poitiers, France
| | - Yves Blériot
- Université de Poitiers, Institut de Chimie IC2MP, UMR-CNRS 7285, Équipe Synthèse Organique, 4 rue Michel
Brunet, 86073 Poitiers, France
| | - Charles Gauthier
- Université de Poitiers, Institut de Chimie IC2MP, UMR-CNRS 7285, Équipe Synthèse Organique, 4 rue Michel
Brunet, 86073 Poitiers, France
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12
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Synthesis and properties of double-stranded RNA-bindable oligodiaminogalactose derivatives conjugated with vitamin E. Bioorg Med Chem 2014; 22:1394-403. [DOI: 10.1016/j.bmc.2013.12.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 12/24/2013] [Accepted: 12/27/2013] [Indexed: 11/24/2022]
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13
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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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14
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Improved methods for the stereoselective synthesis of mannoheptosyl donors and their glycosides: toward the synthesis of the trisaccharide repeating unit of the Campylobacter jejuni RM1221 capsular polysaccharide. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.094] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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15
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Lattová E, Svetlíková Z, Mikušová K, Perreault H, Poláková M. Novel synthetic (1 → 6)-α-d-mannodisaccharide substrates support processive mannosylation catalysed by the mycobacterial cell envelope enzyme fraction. RSC Adv 2013. [DOI: 10.1039/c3ra43575j] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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16
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Cao B, White JM, Williams SJ. Synthesis of glycoconjugate fragments of mycobacterial phosphatidylinositol mannosides and lipomannan. Beilstein J Org Chem 2011; 7:369-77. [PMID: 21512604 PMCID: PMC3079179 DOI: 10.3762/bjoc.7.47] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2011] [Accepted: 03/11/2011] [Indexed: 11/23/2022] Open
Abstract
Mycobacterium tuberculosis, the causitive agent of tuberculosis (TB), possesses a complex cell wall containing mannose-rich glycophospholids termed phosphatidylinositol mannosides (PIMs), lipomannan (LM), and lipoarabinomannan (LAM). These glycophospholipids play important roles in cell wall function and host–pathogen interactions. Synthetic PIM/LM/LAM substructures are useful biochemical tools to delineate and dissect the fine details of mannose glycophospholipid biosynthesis and their interactions with host cells. We report the efficient synthesis of a series of azidooctyl di- and trimannosides possessing the following glycan structures: α-Man-1,6-α-Man, α-Man-1,6-α-Man-1,6-α-Man, α-Man-1,2-α-Man-1,6-α-Man and 2,6-di-(α-Man)-α-Man. The synthesis includes the use of non-benzyl protecting groups compatible with the azido group and preparation of the branched trisaccharide structure 2,6-di-(α-Man)-α-Man through a double glycosylation of a 3,4-butanediacetal-protected mannoside. The azidooctyl groups of these synthetic mannans were elaborated to fluorescent glycoconjugates and squaric ester derivatives useful for further conjugation studies.
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Affiliation(s)
- Benjamin Cao
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Parkville, Victoria, Australia, ; Tel: +61 3 8344 2422
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Lo Conte M, Marra A, Chambery A, Gurcha SS, Besra GS, Dondoni A. Modular approach to triazole-linked 1,6-α-D-oligomannosides to the discovery of inhibitors of Mycobacterium tuberculosis cell wall synthetase. J Org Chem 2011; 75:6326-36. [PMID: 20822121 DOI: 10.1021/jo100928g] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aiming at developing inhibitors of mannosyltransferases, the enzymes that participate in the biosynthesis of the cell envelope of Mycobacterium tuberculosis, the synthesis of a range of designed triazole-linked 1,6-oligomannosides up to a hexadecamer has been accomplished by a modular approach centered on the Cu(I)-catalyzed azide-alkyne cycloaddition as key process. The efficiency and fidelity of the cycloaddition are substantiated by high yields (76-96%) and exclusive formation of the expected 1,4-disubstituted triazole ring in all oligomer assembling reactions. Key features of oligomers thus prepared are the anomeric carbon-carbon bond of all mannoside residues and the 6-deoxymannoside capping residue. Suitable bioassays with dimer, tetramer, hexamer, octamer, decamer, and hexadecamer showed variable inhibitor activity against mycobacterial α-(1,6)-mannosyltransferases, the highest activity (IC(50) = 0.14-0.22 mM) being registered with the hexamannoside and octamannoside.
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Affiliation(s)
- Mauro Lo Conte
- Dipartimento di Chimica, Laboratorio di Chimica Organica, Università di Ferrara, Via L. Borsari 46, I-44100 Ferrara, Italy
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18
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Synthesis of alkyl and cycloalkyl α-d-mannopyranosides and derivatives thereof and their evaluation in the mycobacterial mannosyltransferase assay. Carbohydr Res 2010; 345:1339-47. [DOI: 10.1016/j.carres.2010.03.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Revised: 03/05/2010] [Accepted: 03/09/2010] [Indexed: 10/19/2022]
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19
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Umesiri FE, Sanki AK, Boucau J, Ronning DR, Sucheck SJ. Recent advances toward the inhibition of mAG and LAM synthesis in Mycobacterium tuberculosis. Med Res Rev 2010; 30:290-326. [DOI: 10.1002/med.20190] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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20
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Cao B, Williams SJ. Chemical approaches for the study of the mycobacterial glycolipids phosphatidylinositol mannosides, lipomannan and lipoarabinomannan. Nat Prod Rep 2010; 27:919-47. [DOI: 10.1039/c000604a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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21
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Tam PH, Lowary TL. Epimeric and amino disaccharide analogs as probes of an alpha-(1-->6)-mannosyltransferase involved in mycobacterial lipoarabinomannan biosynthesis. Org Biomol Chem 2009; 8:181-92. [PMID: 20024149 DOI: 10.1039/b916580k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mycobacterial lipoarabinomannan (LAM) is an important, immunologically active glycan found in the cell wall of mycobacteria, including the human pathogen Mycobacterium tuberculosis. At the core of LAM is a mannan domain comprised of alpha-(1-->6)-linked-mannopyranose (Manp) residues. Previously, we and others have demonstrated that alpha-Manp-(1-->6)-alpha-Manp disaccharides (e.g., Manp-(1-->6)-alpha-ManpOctyl, ) are the minimum acceptor substrates for enzymes involved in the assembly of the LAM mannan core. We report here the synthesis five epimeric and three amino analogs of , and their subsequent biochemical evaluation against an alpha-(1-->6)-ManT activity present in a membrane preparation from M. smegmatis. Changing the manno- configuration of either residue of to talo- or gluco- led to a reduction or loss of activity, thus confirming earlier work showing that the C-2 and C-4 hydroxyl groups of each monosaccharide were important for enzymatic recognition. Characterization of the products formed from these analogs was done using a combination of mass spectrometry and glycosidase digestion, and full substrate kinetics were also performed. The analogs in which the acceptor hydroxyl group had been replaced with an amino group were, as expected, not substrates for the enzyme, but were weak inhibitors.
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Affiliation(s)
- Pui Hang Tam
- Alberta Ingenuity Centre for Carbohydrate Science and Department of Chemistry, The University of Alberta, Gunning-Lemieux Chemistry Centre, Edmonton, AB T6G 2G2, Canada
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22
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Xue J, Kumar V, Khaja SD, Chandrasekaran E, Locke RD, Matta KL. Syntheses of fluorine-containing mucin core 2/core 6 structures using novel fluorinated glucosaminyl donors. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.07.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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23
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Efficient regeneration of the 5-acetamido group of a neuraminic acid aryl glycoside from the O-nethyl acetimidate function under acidic conditions. Russ Chem Bull 2009. [DOI: 10.1007/s11172-010-0030-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Ghosh S, Tiwari P, Pandey S, Misra AK, Chaturvedi V, Gaikwad A, Bhatnagar S, Sinha S. Synthesis and evaluation of antitubercular activity of glycosyl thio- and sulfonyl acetamide derivatives. Bioorg Med Chem Lett 2008; 18:4002-5. [DOI: 10.1016/j.bmcl.2008.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 05/08/2008] [Accepted: 06/03/2008] [Indexed: 10/22/2022]
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25
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Exploring the Substrate Specificity of a Mycobacterial Polyprenol Monophosphomannose-Dependent α-(1→6)-Mannosyltransferase. Chembiochem 2008; 9:267-78. [DOI: 10.1002/cbic.200700391] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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26
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Tam PH, Lowary TL. Synthesis of deoxy and methoxy analogs of octyl alpha-D-mannopyranosyl-(1-->6)-alpha-D-mannopyranoside as probes for mycobacterial lipoarabinomannan biosynthesis. Carbohydr Res 2007; 342:1741-72. [PMID: 17553471 DOI: 10.1016/j.carres.2007.05.001] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2007] [Revised: 04/26/2007] [Accepted: 05/01/2007] [Indexed: 11/16/2022]
Abstract
A panel of analogs of the disaccharide alpha-D-Manp-(1-->6)-alpha-D-Manp-OOctyl, a known acceptor substrate for a polyprenol monophosphomannose-dependent alpha-(1-->6)-mannosyltransferase involved in the assembly of the alpha-(1-->6)-linked mannan core of mycobacterial lipoarabinomannan, has been synthesized. Described are synthetic routes to the target deoxy and methoxy analogs in which one of the hydroxyl groups of the parent disaccharide has been modified. All glycosylation reactions involved the use of octyl glycoside acceptors and thioglycoside donors using iodonium-ion activation, and the stereochemistry of the mannopyranoside bond formed was established by measurement of the 1J(C-1,H-1). Depending on the target, the key methylation or deoxygenation reactions were carried out on either mono- or disaccharide substrates. This series of analogs will be useful for probing the substrate specificity of the enzyme, in particular, its steric and hydrogen-bonding requirements.
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Affiliation(s)
- Pui-Hang Tam
- Alberta Ingenuity Centre for Carbohydrate Science and Department of Chemistry, The University of Alberta, Gunning-Lemieux Chemistry Centre, Edmonton, AB, Canada T6G 2G2
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Xia J, Xue J, Locke RD, Chandrasekaran EV, Srikrishnan T, Matta KL. Synthesis of Fluorinated Mucin Core 2 Branched Oligosaccharides with the Potential of Novel Substrates and Enzyme Inhibitors for Glycosyltransferases and Sulfotransferases. J Org Chem 2006; 71:3696-706. [PMID: 16674039 DOI: 10.1021/jo052626j] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Syntheses of fluorinated mucin core 2 tri- and tetrasaccharides modified at the C-3 or C-4 position of the pertinent galactose residue are reported. These compounds were used for the study of sialyltransferases and 3-O-sulfotransferases involved in the biosynthesis of O-glycans. Our acceptor substrate specificity studies on three cloned sialyltransferases (Sia-Ts) revealed that a 3- or 4-fluoro substituent in beta1,4Gal resulted in poor acceptors for alpha2,6(N)Sia-T and alpha2,3(N)Sia-T, whereas 4-fluoro-Galbeta1,3GalNAcalpha was a good acceptor for alpha2,3(O)Sia-T. Uniquely, 4-F-Galbeta1,4GlcNAcbeta1,6(Galbeta1,3)GalNAcalpha-OBn was an inhibitor of alpha2,6(N)Sia-T activity but not alpha2,3(N)Sia-T activity. Further we found that the activities of only Gal 3-O-sulfotransferases and not sialyltransferases were adversely affected by a C-3 fluoro substituent at the other Gal terminal of mucin core 2. The strategy of building branched mucin core 2 structures by three glycosidation sequence coupling three classes of glycosyl donors with the reactivity-matching acceptors proved to be successful in syntheses of modified mucin-type core structures of O-glycan. The relative poor yields of the glycosylations using fluorinated galactosyl donors indicated that the fluorine modification dramatically decreased the donor reactivity due to electron-withdrawing effect.
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Affiliation(s)
- Jie Xia
- Department of Cancer Biology, Roswell Park Cancer Institute, Buffalo, New York 14263, USA
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