1
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Seitz A, Wende RC, Roesner E, Niedek D, Topp C, Colgan AC, McGarrigle EM, Schreiner PR. Site-Selective Acylation of Pyranosides with Oligopeptide Catalysts. J Org Chem 2021; 86:3907-3922. [PMID: 33617252 DOI: 10.1021/acs.joc.0c02772] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Herein, we report the oligopeptide-catalyzed site-selective acylation of partially protected monosaccharides. We identified catalysts that invert site-selectivity compared to N-methylimidazole, which was used to determine the intrinsic reactivity, for 4,6-O-protected glucopyranosides (trans-diols) as well as 4,6-O-protected mannopyranosides (cis-diols). The reaction yields up to 81% of the inherently unfavored 2-O-acetylated products with selectivities up to 15:1 using mild reaction conditions. We also determined the influence of protecting groups on the reaction and demonstrate that our protocol is suitable for one-pot reactions with multiple consecutive protection steps.
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Affiliation(s)
- Alexander Seitz
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Raffael C Wende
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Emily Roesner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Dominik Niedek
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Christopher Topp
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Avene C Colgan
- Centre for Synthesis & Chemical Biology, UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Eoghan M McGarrigle
- Centre for Synthesis & Chemical Biology, UCD School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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2
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Liu K, Wang L, Guo Z. An extensive review of studies on mycobacterium cell wall polysaccharide-related oligosaccharides – part III: synthetic studies and biological applications of arabinofuranosyl oligosaccharides and their analogs, derivatives and conjugates. J Carbohydr Chem 2019. [DOI: 10.1080/07328303.2019.1630841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji′nan, Shandong, China
| | - Lizhen Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Ji′nan, Shandong, China
| | - Zhongwu Guo
- Department of Chemistry, University of Florida, Gainesville, FL, USA
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3
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Inoue C, Okamoto Y, Vavricka CJ, Kiyota H, Izumi M. Synthesis of Halogenated-4-Nitrophenyl 2-deoxy-2-halogeno-pyranosides via N -Halogenosuccinimide Activated Glucal. Nat Prod Commun 2018. [DOI: 10.1177/1934578x1801300125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Reaction of 3,4,6-tri- O -acetyl-D-glucal with silver 4-nitrophenolate in the presence of N -iodosuccinimide and N -bromosuccinimide produced (2,6-dihalo-4-nitro)phenyl 2-halo-2-deoxy-α-D-glycopyranosides. Although bromination and iodination of the 4-nitrophenyl group could not be avoided, the resulting (2,6-dihalo-4-nitro)phenylated compounds can be used as substrates or covalent glycosidase inhibitors after deprotection. The stereoselectivity and regioselectivity of the halogenation reactions are described.
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Affiliation(s)
- Chieri Inoue
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Yumi Okamoto
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Christopher J. Vavricka
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
- Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan
| | - Hiromasa Kiyota
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
| | - Minoru Izumi
- Graduate School of Environmental and Life Science, Okayama University, 1-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan
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4
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Yoshida K, Kanoko Y, Takao K. Kinetically Controlled α-SelectiveO-Glycosylation of Phenol Derivatives Using 2-Nitroglycals by a Bifunctional Chiral Thiourea Catalyst. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Keisuke Yoshida
- Institute for Chemical Research; Kyoto University, Gokasho, Uji; Kyoto 611-0011 Japan
| | - Yohei Kanoko
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
| | - Kenichi Takao
- Department of Applied Chemistry; Keio University, Hiyoshi, Kohoku-ku; Yokohama 223-8522 Japan
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5
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Truncation of N- and C-terminal regions of Streptococcus mutans dextranase enhances catalytic activity. Appl Microbiol Biotechnol 2011; 91:329-39. [DOI: 10.1007/s00253-011-3201-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 02/16/2011] [Accepted: 02/18/2011] [Indexed: 10/18/2022]
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6
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Activity of Debaryomyces hansenii UFV-1 α-galactosidases against α-d-galactopyranoside derivatives. Carbohydr Res 2011; 346:602-5. [DOI: 10.1016/j.carres.2011.01.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2009] [Revised: 01/10/2011] [Accepted: 01/20/2011] [Indexed: 11/23/2022]
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7
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Stütz AE, Wrodnigg TM. Imino sugars and glycosyl hydrolases: historical context, current aspects, emerging trends. Adv Carbohydr Chem Biochem 2011; 66:187-298. [PMID: 22123190 DOI: 10.1016/b978-0-12-385518-3.00004-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Forty years of discoveries and research on imino sugars, which are carbohydrate analogues having a basic nitrogen atom instead of oxygen in the sugar ring and, acting as potent glycosidase inhibitors, have made considerable impact on our contemporary understanding of glycosidases. Imino sugars have helped to elucidate the catalytic machinery of glycosidases and have refined our methods and concepts of utilizing them. A number of new aspects have emerged for employing imino sugars as pharmaceutical compounds, based on their profound effects on metabolic activities in which glycosidases are involved. From the digestion of starch to the fight against viral infections, from research into malignant diseases to potential improvements in hereditary storage disorders, glycosidase action and inhibition are essential issues. This account aims at combining general developments with a focus on some niches where imino sugars have become useful tools for glycochemistry and glycobiology.
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Affiliation(s)
- Arnold E Stütz
- Institut für Organische Chemie, Technische Universität Graz, Austria
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8
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Miyagawa A, Totani K, Matsuo I, Ito Y. Promiscuous activity of ER glucosidase II discovered through donor specificity analysis of UGGT. Biochem Biophys Res Commun 2010; 403:322-8. [PMID: 21075077 DOI: 10.1016/j.bbrc.2010.11.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2010] [Accepted: 11/08/2010] [Indexed: 10/18/2022]
Abstract
In glycoprotein quality control system in the endoplasmic reticulum (ER), UGGT (UDP-glucose:glycoprotein glucosyltransferase) and glucosidase II (G-II) play key roles. UGGT serves as a glycoprotein folding sensor by virtue of its unique specificity to glucosylate glycoproteins at incompletely folded stage. By using various UDP-Glc analogues, we first analyzed donor specificity of UGGT, which was proven to be rather narrow. However, marginal activity was observed with UDP-galactose and UDP-glucuronic acid as well as with 3-, 4- and 6-deoxy glucose analogues to give corresponding transfer products. Intriguingly, G-II smoothly converted all of them back to Man(9)GlcNAc(2), providing an indication that G-II has a promiscuous activity as a broad specificity hexosidase.
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Affiliation(s)
- Atsushi Miyagawa
- RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan.
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9
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Zhang J, Zhang QS, Tian GY. Study on Synthesis of Multivalent Neoglycoproteins and Their Binding Properties to Hepatic Stellate Cells. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20030210725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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10
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Trincone A, Pagnotta E, Giordano A, Perugino G, Rossi M, Moracci M. Enzymatic Synthesis of 2-Deoxyglycosides Using the ß-Glycosidase of the ArchaeonSulfolobus solfataricus. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/1024242031000076224] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Weignerová L, Simerská P, Křen V. α-Galactosidases and their applications in biotransformations. BIOCATAL BIOTRANSFOR 2009. [DOI: 10.1080/10242420802583416] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Raju R, Castillo BF, Richardson SK, Thakur M, Severins R, Kronenberg M, Howell AR. Synthesis and evaluation of 3''- and 4''-deoxy and -fluoro analogs of the immunostimulatory glycolipid, KRN7000. Bioorg Med Chem Lett 2009; 19:4122-5. [PMID: 19535248 DOI: 10.1016/j.bmcl.2009.06.005] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2009] [Revised: 05/28/2009] [Accepted: 06/01/2009] [Indexed: 12/25/2022]
Abstract
Four 3''- and 4''-deoxy and -fluorogalactosyl ceramides were synthesized, and their ability to stimulate iNKT cells, based on levels of IL-2 production, was assessed in three NKT cell receptor hybridomas. In two of the hybridomas, 1.2 and 2H4, all of the analogs were immunostimulatory, while in the 1.4 hybridoma only the 4''-fluoro analog led to the production of significant levels of IL-2.
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Affiliation(s)
- Ravinder Raju
- Department of Chemistry, University of Connecticut, Storrs, CT 06269-3060, United States
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13
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Chang SS, Lin CC, Li YK, Mong KKT. A straightforward α-selective aromatic glycosylation and its application for stereospecific synthesis of 4-methylumbelliferyl α-T-antigen. Carbohydr Res 2009; 344:432-8. [DOI: 10.1016/j.carres.2008.12.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2008] [Revised: 12/07/2008] [Accepted: 12/11/2008] [Indexed: 11/24/2022]
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14
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Pathak AK, Pathak V, Suling WJ, Riordan JR, Gurcha SS, Besra GS, Reynolds RC. Synthesis of deoxygenated alpha(1-->5)-linked arabinofuranose disaccharides as substrates and inhibitors of arabinosyltransferases of Mycobacterium tuberculosis. Bioorg Med Chem 2009; 17:872-81. [PMID: 19056279 PMCID: PMC2707774 DOI: 10.1016/j.bmc.2008.11.027] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2008] [Revised: 11/10/2008] [Accepted: 11/12/2008] [Indexed: 10/21/2022]
Abstract
Arabinosyltransferases (AraTs) play a critical role in mycobacterial cell wall biosynthesis and are potential drug targets for the treatment of tuberculosis, especially multi-drug resistant forms of M. tuberculosis (MTB). Herein, we report the synthesis and acceptor/inhibitory activity of Araf alpha(1-->5) Araf disaccharides possessing deoxygenation at the reducing sugar of the disaccharide. Deoxygenation at either the C-2 or C-3 position of Araf was achieved via a free radical procedure using xanthate derivatives of the hydroxyl group. The alpha(1-->5)-linked disaccharides were produced by coupling n-octyl alpha-Araf 2-/3-deoxy, 2-fluoro glycosyl acceptors with an Araf thioglycosyl donor. The target disaccharides were tested in a cell free mycobacterial AraTs assay as well as an in vitro assay against MTB H(37)Ra and M. avium complex strains.
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Affiliation(s)
- Ashish K. Pathak
- Drug Discovery Division, Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255, USA
| | - Vibha Pathak
- Drug Discovery Division, Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255, USA
| | - William J. Suling
- Drug Discovery Division, Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255, USA
| | - James R. Riordan
- Drug Discovery Division, Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255, USA
| | - Sudagar S. Gurcha
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Gurdyal S. Besra
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Robert C. Reynolds
- Drug Discovery Division, Southern Research Institute, P.O. Box 55305, Birmingham, AL 35255, USA
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15
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16
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Hakamata W, Muroi M, Nishio T, Oku T, Takatsuki A, Osada H, Fukuhara K, Okuda H, Kurihara M. N-Linked Oligosaccharide Processing Enzymes as Molecular Targets for Drug Discovery. J Appl Glycosci (1999) 2006. [DOI: 10.5458/jag.53.149] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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17
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Ogawa M, Nishio T, Minoura K, Uozumi T, Wada M, Hashimoto N, Kawachi R, Oku T. Recombinant .ALPHA.-Glucosidase from Aspergillus niger. Overexpression by Emericella nidulans, Purification and Characterization. J Appl Glycosci (1999) 2006. [DOI: 10.5458/jag.53.13] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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18
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Hakamata W, Yamamoto E, Muroi M, Mochizuki M, Kurihara M, Okuda H, Fukuhara K. Design and Synthesis of .ALPHA.-Glucosidase Inhibitor Having DNA Cleaving Activity. J Appl Glycosci (1999) 2006. [DOI: 10.5458/jag.53.255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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19
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Hakamata W, Muroi M, Kadokura K, Nishio T, Oku T, Kimura A, Chiba S, Takatsuki A. Aglycon specificity profiling of α-glucosidases using synthetic probes. Bioorg Med Chem Lett 2005; 15:1489-92. [PMID: 15713413 DOI: 10.1016/j.bmcl.2004.12.086] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2004] [Revised: 12/27/2004] [Accepted: 12/28/2004] [Indexed: 11/30/2022]
Abstract
We designed and synthesized hydrogen bond based probes 1-8 with the exception of known glycosidase inhibition mechanisms, and aglycon specificity of 11 different sources of alpha-glucosidases were investigated using their probes. Probe 4 (2,6-anhydro-1-deoxy-1-[(1-oxopentyl-5-hydroxy)amino]-D-glycero-D-ido-heptitol) showed a potent inhibition of S. cerevisiae alpha-glucosidase among all alpha-glucosidases. Probe 4 was found to be a competitive inhibitor for S. cerevisiae alpha-glucosidase with Ki 0.13 mM.
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Affiliation(s)
- Wataru Hakamata
- Animal and Cellular Systems Laboratory, The Institute of Physical and Chemical Research (RIKEN), 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
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20
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Nishio T, Hakamata W, Ogawa M, Nakajima K, Matsuishi Y, Kawachi R, Oku T. Investigations of a Useful .ALPHA.-Glycosidase for the Enzymatic Synthesis of Rare Sugar Oligosaccharides. J Appl Glycosci (1999) 2005. [DOI: 10.5458/jag.52.153] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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21
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Hakamata W, Muroi M, Nishio T, Oku T, Takatsuki A. Recognition Properties of Processing α‐Glucosidase I and α‐Glucosidase II. J Carbohydr Chem 2004. [DOI: 10.1081/car-120030022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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22
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Ogawa M, Nishio T, Hakamata W, Matsuishi Y, Hoshino S, Kondo A, Kitagawa M, Kawachi R, Oku T. Substrate Hydroxyl Groups Are Involved in the Ionization of Catalytic Carboxyl Groups of Aspergillus niger .ALPHA.-Glucosidase. J Appl Glycosci (1999) 2004. [DOI: 10.5458/jag.51.9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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23
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Nishio T, Kanai C, Hakamata W, Ogawa M, Nakajima K, Hoshino S, Matsuishi A, Kawachi R, Oku T. Glycosidase-catalyzed deoxy oligosaccharide synthesis. Practical synthesis of monodeoxy analogs of ethyl beta-thioisomaltoside using Aspergillus niger alpha-glucosidase. Biosci Biotechnol Biochem 2003; 67:1024-9. [PMID: 12834279 DOI: 10.1271/bbb.67.1024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Enzymatic transglycosylation using four possible monodeoxy analogs of p-nitrophenyl alpha-D-glucopyranoside (Glc alpha-O-pNP), modified at the C-2, C-3, C-4, and C-6 positions (2D-, 3D-, 4D-, and 6D-Glc alpha-O-pNP, respectively), as glycosyl donors and six equivalents of ethyl beta-D-thioglucopyranoside (Glc beta-S-Et) as a glycosyl acceptor, to yield the monodeoxy derivatives of glucooligosaccharides were done. The reaction was catalyzed using purified Aspergillus niger alpha-glucosidase in a mixture of 50 mM sodium acetate buffer (pH 4.0)/CH3CN (1:1 v/v) at 37 degrees C. High activity of the enzyme was observed in the reaction between 2D-Glc alpha-O-pNP and Glc beta-S-Et to afford the monodeoxy analogs of ethyl beta-thiomaltoside and ethyl beta-thioisomaltoside that contain a 2-deoxy alpha-D-glucopyranose moiety at their glycon portions, namely ethyl 2-deoxy-alpha-D-arabino-hexopyranosyl-(1,4)-beta-D-thioglucopyranoside and ethyl 2-deoxy-alpha-D-arabino-hexopyranosyl-(1,6)-beta-D-thioglucopyranoside, in 6.72% and 46.6% isolated yields (based on 2D-Glc alpha-O-pNP), respectively. Moreover, from 3D-Glc alpha-O-pNP and Glc beta-S-Et, the enzyme also catalyzed the synthesis of the 3-deoxy analog of ethyl beta-thioisomaltoside that was modified at the glycon alpha-D-glucopyranose moiety, namely ethyl 3-deoxy-alpha-D-ribo-hexopyranosyl-(1,6)-beta-D-thioglucopyranoside, in 23.0% isolated yield (based on 3D-Glc alpha-O-pNP). Products were not obtained from the enzymatic reactions between 4D- or 6D-Glc alpha-O-pNP and Glc beta-S-Et.
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Affiliation(s)
- Toshiyuki Nishio
- Laboratory of Bio-organic Chemistry, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-8510, Japan.
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24
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Mikkelsen LM, Skrydstrup T. Synthesis of the C-linked disaccharide alpha-D-Man-(1-->4)-D-Man employing a SmI(2)-mediated C-glycosylation step: en route to cyclic C-oligosaccharides. J Org Chem 2003; 68:2123-8. [PMID: 12636370 DOI: 10.1021/jo020585a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigations are reported on the assembly of the C-linked disaccharide alpha-D-Man-(1-->4)-D-Man, representing the first steps in our projected synthesis of a cyclic C-oligomer containing repeating units of this C-dimer. The key step in this synthesis uses a SmI(2)-mediated coupling of 2,3,4,6-tetra-O-benzyl-alpha-D-mannopyranosyl 2'-pyridyl sulfone with a C4-formyl branched mannopyranoside unit, affording the C-disaccharide derivative with complete stereocontrol at the two new stereogenic centers. Subsequently, a modified tin hydride based deoxygenation produced the target carbohydrate analogue. The synthesis of the C4-formyl monosaccharide makes use of a stereoselective radical-based allylation followed by double bond migration and ozonolysis.
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Affiliation(s)
- Lise Munch Mikkelsen
- Department of Chemistry, University of Aarhus, Langelandsgade 140, 8000 Aarhus C, Denmark
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25
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Chiocconi A, Marino C, Otal E, de Lederkremer RM. Photoinduced electron transfer and chemical alpha-deoxygenation of D-galactono-1,4-lactone. Synthesis of 2-deoxy-D-lyxo-hexofuranosides. Carbohydr Res 2002; 337:2119-26. [PMID: 12433476 DOI: 10.1016/s0008-6215(02)00118-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Two simple procedures for the synthesis of 2-deoxy-D-lyxo-hexono-1,4-lactone are described. Reductive cleavage of a 2-O-tosyl derivative of D-galactono-1,4-lactone in the presence of sodium iodide afforded the 2-deoxy derivative. On the other hand, alpha-deoxygenation of D-galactono-1,4-lactone was easily achieved by photochemical electron transfer deoxygenation of HO-2 as the 3-(trifluoromethyl)benzoate. Methyl 2-deoxy-beta-D-lyxo-hexafuranoside ('methyl 2-deoxy-beta-D-galactofuranoside') was synthesized and tested as substrate for exo beta-D-galactofuranosidase from Penicillium fellutanum. The reaction was followed by HPAEC, showing that methyl 2-deoxy-beta-D-galactofuranoside was not hydrolyzed by incubation with the enzyme. Neither the 2-deoxy lactone, nor the 2-deoxy-beta-D-galactofuranoside acted as inhibitors of the reaction with the 4-nitrophenyl beta-D-galactofuranoside. The present and our previous results show that the hydroxyl groups at C-2, C-3 and C-6 of the galactofuranoside are essential for interaction with the exo beta-D-galactofuranosidase.
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Affiliation(s)
- Alejandro Chiocconi
- CIHIDECAR, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
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26
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Nishio T, Hakamata W, Kimura A, Chiba S, Takatsuki A, Kawachi R, Oku T. Glycon specificity profiling of alpha-glucosidases using monodeoxy and mono-O-methyl derivatives of p-nitrophenyl alpha-D-glucopyranoside. Carbohydr Res 2002; 337:629-34. [PMID: 11909596 DOI: 10.1016/s0008-6215(02)00026-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Hydrolysis of probe substrates, eight possible monodeoxy and mono-O-methyl analogs of p-nitrophenyl alpha-D-glucopyranoside (pNP alpha-D-Glc), modified at the C-2, C-3, C-4, and C-6 positions, was studied as part of investigations into the glycon specificities of seven alpha-glucosidases (EC 3.2.1.20) isolated from Saccharomyces cerevisiae, Bacillus stearothermophilus, honeybee (two enzymes), sugar beet, flint corn, and Aspergillus niger. The glucosidases from sugar beet, flint corn, and A. niger were found to hydrolyze the 2-deoxy analogs with substantially higher activities than against pNP alpha-D-Glc. Moreover, the flint corn and A. niger enzymes showed hydrolyzing activities, although low, for the 3-deoxy analog. The other four alpha-glucosidases did not exhibit any activities for either the 2- or the 3-deoxy analogs. None of the seven enzymes exhibited any activities toward the 4-deoxy, 6-deoxy, or any of the methoxy analogs. The hydrolysis results, with the deoxy substrate analogs, demonstrated that alpha-glucosidases having remarkably different glycon specificities exist in nature. Further insight into the hydrolysis of deoxyglycosides was obtained by determining the kinetic parameters (k(cat) and K(m)) for the reactions of sugar beet, flint corn, and A. niger enzymes.
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Affiliation(s)
- Toshiyuki Nishio
- Laboratory of Bio-organic Chemistry, Department of Biological Chemistry, College of Bioresource Sciences, Nihon University, 1866 Kameino, Fujisawa-shi, Kanagawa 252-8510, Japan.
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Graziani A, Passacantilli P, Piancatelli G, Tani S. A mild and efficient approach for the regioselective silyl-mediated protection–deprotection of C-4 hydroxyl group on carbohydrates. Tetrahedron Lett 2001. [DOI: 10.1016/s0040-4039(01)00611-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Hakamata W, Nishio T, Sato R, Mochizuki T, Tsuchiya K, Yasuda M, Oku T. Synthesis of Monomethyl Derivatives ofP-Nitrophenyl α-D-Gluco, Galacto, and Mannopyranosides and their Hydrolytic Properties Against α-Glycosidases. J Carbohydr Chem 2000. [DOI: 10.1080/07328300008544084] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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