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Vucko T, Pellegrini Moïse N, Lamandé-Langle S. Value-added carbohydrate building blocks by regioselective O-alkylation of C-glucosyl compounds. Carbohydr Res 2019; 477:1-10. [DOI: 10.1016/j.carres.2019.03.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/19/2019] [Accepted: 03/19/2019] [Indexed: 10/27/2022]
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2
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Kumari N, Olesen JK, Pedersen CM, Bols M. Synthesis of 5-Bromomethylfurfural from Cellulose as a Potential Intermediate for Biofuel. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001539] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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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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Synthesis and biological activity of ester and ether analogues of alpha-galactosylceramide (KRN7000). Carbohydr Res 2010; 345:1663-84. [PMID: 20591421 DOI: 10.1016/j.carres.2010.05.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 04/28/2010] [Accepted: 05/06/2010] [Indexed: 11/23/2022]
Abstract
Alpha-Galactosylceramide (alphaGalCer, KRN7000) has been identified as a modulator of immunological processes through its capacity to bind iNKT cells mediated by CD1d molecules. Some analogues in while the amide group in alphaGalCer is replaced with ester or ether groups were synthesized from d-arabinitol or l-ribose to evaluate their ability to activate iNKT cells. Ester analogues 30a, 31a, and 61 showed activity for IFNgamma and IL-4 production of iNKT cells, while ether (31b) and 4-methoxy ester (76) analogues of alpha-galactosylceramide were not active for iNKT cells.
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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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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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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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8
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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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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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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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11
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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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12
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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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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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Sahin-Tóth M, Lawrence MC, Nishio T, Kaback HR. The C-4 hydroxyl group of galactopyranosides is the major determinant for ligand recognition by the lactose permease of Escherichia coli. Biochemistry 2001; 40:13015-9. [PMID: 11669639 DOI: 10.1021/bi011233l] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Binding specificity in lactose permease toward galactopyranosides is governed by H-bonding interactions at C-2, C-3, C-4, and C-6 OH groups, while binding affinity can be increased dramatically by nonspecific hydrophobic interactions with the non-galactosyl moiety [Sahin-Tóth, M., Akhoon, K. M., Runner, J., and Kaback, H. R. (2000) Biochemistry 39, 5097-5103]. To characterize the contribution of individual hydroxyls, binding of structural analogues of p-nitrophenyl alpha-D-galactopyranoside (NPG) was examined by site-directed N-[(14)C]ethylmaleimide (NEM) labeling of the substrate-protectable Cys148 in the binding site. NPG blocks NEM alkylation of Cys148 with an apparent affinity of approximately 14 microM. A deoxy derivative at position C-2 binds with 25-fold lower affinity (K(D) 0.35 mM), and the deoxy analogue at C-3 exhibits ca. 70-fold decreased binding (K(D) 1 mM), while binding of 6-deoxy-NPG is at least 130-fold diminished (K(D) 1.9 mM). Remarkably, the C-4 deoxy derivative of NPG binds with almost 1500-fold reduced affinity (K(D) approximately 20 mM). No significant substrate protection is afforded by NPG analogues with methoxy (CH(3)-O-) substitutions at positions C-3, C-4, and C-6. In contrast, the C-2 methoxy analogue binds almost normally (K(D) 26 microM). The results confirm and extend the observations that the C-2, C-3, C-4, and C-6 OH groups of galactopyranosides participate in important H-bonding interactions. Moreover, the C-4 hydroxyl is identified as the major determinant of ligand binding, suggesting that sugar recognition in lactose permease may have evolved to discriminate primarily between gluco- and galactopyranosides.
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Affiliation(s)
- M Sahin-Tóth
- Howard Hughes Medical Institute, University of California Los Angeles, Los Angeles, California 90095-1662, USA
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