1
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González-Cuesta M, Herrera-González I, García-Moreno MI, Ashmus RA, Vocadlo DJ, García Fernández JM, Nanba E, Higaki K, Ortiz Mellet C. sp 2-Iminosugars targeting human lysosomal β-hexosaminidase as pharmacological chaperone candidates for late-onset Tay-Sachs disease. J Enzyme Inhib Med Chem 2022; 37:1364-1374. [PMID: 35575117 PMCID: PMC9126592 DOI: 10.1080/14756366.2022.2073444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The late-onset form of Tay-Sachs disease displays when the activity levels of human β-hexosaminidase A (HexA) fall below 10% of normal, due to mutations that destabilise the native folded form of the enzyme and impair its trafficking to the lysosome. Competitive inhibitors of HexA can rescue disease-causative mutant HexA, bearing potential as pharmacological chaperones, but often also inhibit the enzyme O-glucosaminidase (GlcNAcase; OGA), a serious drawback for translation into the clinic. We have designed sp2-iminosugar glycomimetics related to GalNAc that feature a neutral piperidine-derived thiourea or a basic piperidine-thiazolidine bicyclic core and behave as selective nanomolar competitive inhibitors of human Hex A at pH 7 with a ten-fold lower inhibitory potency at pH 5, a good indication for pharmacological chaperoning. They increased the levels of lysosomal HexA activity in Tay-Sachs patient fibroblasts having the G269S mutation, the highest prevalent in late-onset Tay-Sachs disease.
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Affiliation(s)
- Manuel González-Cuesta
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - Irene Herrera-González
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - M Isabel García-Moreno
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
| | - Roger A Ashmus
- Department of Chemistry and Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, Canada
| | - David J Vocadlo
- Department of Chemistry and Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, Canada
| | - José M García Fernández
- Instituto de Investigaciones Químicas (IIQ), Consejo Superior de Investigaciones Científicas (CSIC) - Universidad de Sevilla, Sevilla, Spain
| | - Eiji Nanba
- Organization for Research Initiative and Promotion, Tottori University, Yonago, Japan
| | - Katsumi Higaki
- Organization for Research Initiative and Promotion, Tottori University, Yonago, Japan
| | - Carmen Ortiz Mellet
- Department of Organic Chemistry, Faculty of Chemistry, University of Seville, Sevilla, Spain
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2
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Sato M, Liebschner D, Yamada Y, Matsugaki N, Arakawa T, Wills SS, Hattie M, Stubbs KA, Ito T, Senda T, Ashida H, Fushinobu S. The first crystal structure of a family 129 glycoside hydrolase from a probiotic bacterium reveals critical residues and metal cofactors. J Biol Chem 2017; 292:12126-12138. [PMID: 28546425 DOI: 10.1074/jbc.m117.777391] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 05/22/2017] [Indexed: 11/06/2022] Open
Abstract
The α-N-acetylgalactosaminidase from the probiotic bacterium Bifidobacterium bifidum (NagBb) belongs to the glycoside hydrolase family 129 and hydrolyzes the glycosidic bond of Tn-antigen (GalNAcα1-Ser/Thr). NagBb is involved in assimilation of O-glycans on mucin glycoproteins by B. bifidum in the human gastrointestinal tract, but its catalytic mechanism has remained elusive because of a lack of sequence homology around putative catalytic residues and of other structural information. Here we report the X-ray crystal structure of NagBb, representing the first GH129 family structure, solved by the single-wavelength anomalous dispersion method based on sulfur atoms of the native protein. We determined ligand-free, GalNAc, and inhibitor complex forms of NagBb and found that Asp-435 and Glu-478 are located in the catalytic domain at appropriate positions for direct nucleophilic attack at the anomeric carbon and proton donation for the glycosidic bond oxygen, respectively. A highly conserved Asp-330 forms a hydrogen bond with the O4 hydroxyl of GalNAc in the -1 subsite, and Trp-398 provides a stacking platform for the GalNAc pyranose ring. Interestingly, a metal ion, presumably Ca2+, is involved in the recognition of the GalNAc N-acetyl group. Mutations at Asp-435, Glu-478, Asp-330, and Trp-398 and residues involved in metal coordination (including an all-Ala quadruple mutant) significantly reduced the activity, indicating that these residues and the metal ion play important roles in substrate recognition and catalysis. Interestingly, NagBb exhibited some structural similarities to the GH101 endo-α-N-acetylgalactosaminidases, but several critical differences in substrate recognition and reaction mechanism account for the different activities of these two enzymes.
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Affiliation(s)
- Mayo Sato
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Dorothee Liebschner
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Yusuke Yamada
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Naohiro Matsugaki
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Takatoshi Arakawa
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Siobhán S Wills
- School of Molecular Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Mitchell Hattie
- School of Molecular Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Keith A Stubbs
- School of Molecular Sciences, University of Western Australia, Crawley, Western Australia 6009, Australia
| | - Tasuku Ito
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
| | - Toshiya Senda
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba 305-0801, Japan
| | - Hisashi Ashida
- Faculty of Biology-Oriented Science and Technology, Kindai University, 930 Nishimitani, Kinokawa-shi, Wakayama 649-6493, Japan
| | - Shinya Fushinobu
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan.
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3
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Alteen MG, Oehler V, Nemčovičová I, Wilson IBH, Vocadlo DJ, Gloster TM. Mechanism of Human Nucleocytoplasmic Hexosaminidase D. Biochemistry 2016; 55:2735-47. [PMID: 27149221 PMCID: PMC4878814 DOI: 10.1021/acs.biochem.5b01285] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
Mammalian
β-hexosaminidases have been shown to play essential
roles in cellular physiology and health. These enzymes are responsible
for the cleavage of the monosaccharides N-acetylglucosamine
(GlcNAc) and N-acetylgalactosamine (GalNAc) from
cellular substrates. One of these β-hexosaminidases, hexosaminidase
D (HexD), encoded by the HEXDC gene, has received
little attention. No mechanistic studies have focused on the role
of this unusual nucleocytoplasmically localized β-hexosaminidase,
and its cellular function remains unknown. Using a series of kinetic
and mechanistic investigations into HexD, we define the precise catalytic
mechanism of this enzyme and establish the identities of key enzymic
residues. The preparation of synthetic aryl N-acetylgalactosaminide
substrates for HexD in combination with measurements of kinetic parameters
for wild-type and mutant enzymes, linear free energy analyses of the
enzyme-catalyzed hydrolysis of these substrates, evaluation of the
reaction by nuclear magnetic resonance, and inhibition studies collectively
reveal the detailed mechanism of action employed by HexD. HexD is
a retaining glycosidase that operates using a substrate-assisted catalytic
mechanism, has a preference for galactosaminide over glucosaminide
substrates, and shows a pH optimum in its second-order rate constant
at pH 6.5–7.0. The catalytically important residues are Asp148
and Glu149, with Glu149 serving as the general acid/base residue and
Asp148 as the polarizing residue. HexD is inhibited by Gal-NAG-thiazoline
(Ki = 420 nM). The fundamental insights
gained from this study will aid in the development of potent and selective
probes for HexD, which will serve as useful tools to improve our understanding
of the physiological role played by this unusual enzyme.
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Affiliation(s)
- Matthew G Alteen
- Department of Chemistry, Simon Fraser University , 8888 University Drive, Burnaby, BC V5A 1S6, Canada.,Biomedical Sciences Research Complex, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Verena Oehler
- Biomedical Sciences Research Complex, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Ivana Nemčovičová
- Department für Chemie, Universität für Bodenkultur , Muthgasse 18, A-1190 Wien, Austria
| | - Iain B H Wilson
- Department für Chemie, Universität für Bodenkultur , Muthgasse 18, A-1190 Wien, Austria
| | - David J Vocadlo
- Department of Chemistry, Simon Fraser University , 8888 University Drive, Burnaby, BC V5A 1S6, Canada
| | - Tracey M Gloster
- Biomedical Sciences Research Complex, University of St Andrews , North Haugh, St Andrews, Fife KY16 9ST, U.K
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4
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Krejzová J, Kulik N, Slámová K, Křen V. Expression of human β-N-acetylhexosaminidase B in yeast eases the search for selective inhibitors. Enzyme Microb Technol 2016; 89:1-6. [PMID: 27233122 DOI: 10.1016/j.enzmictec.2016.03.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 02/29/2016] [Accepted: 03/07/2016] [Indexed: 11/27/2022]
Abstract
Human lysosomal β-N-acetylhexosaminidases from the family 20 of glycoside hydrolases are dimeric enzymes catalysing the cleavage of terminal β-N-acetylglucosamine and β-N-acetylgalactosamine residues from a broad spectrum of glycoconjugates. Here, we present a facile, robust, and cost-effective extracellular expression of human β-N-acetylhexosaminidase B in Pichia pastoris KM71H strain. The prepared Hex B was purified in a single step with 33% yield obtaining 10mg of the pure enzyme per 1L of the culture media. The enzyme was used in the inhibition assays with the known mechanism-based inhibitor NAG-thiazoline and a wide variety of its derivatives in the search for specific inhibitors of the human GH20 β-N-acetylhexosaminidases over the human GH84 β-N-acetylglucosaminidase, which was expressed, purified and used in the inhibition experiments as well. Moreover, enzyme-inhibitor complexes were analysed employing computational tools in order to reveal the structural basis of the results of the inhibition assays, showing the importance of water-mediated interactions between the enzyme and respective ligands. The presented method for the heterologous expression of human Hex B is robust, it significantly reduces the costs and equipment demands in comparison to the expression in mammalian cell lines. This will enhance accessibility of this human enzyme to the broad scientific community and may speed up the research of specific inhibitors of this physiologically important glycosidase family.
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Affiliation(s)
- Jana Krejzová
- Laboratory of Biotransformation, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; Department of Biochemistry and Microbiology, University of Chemistry and Technology Prague, Technická 5, CZ 16628 Praha 6, Czech Republic.
| | - Natallia Kulik
- Department of Structure and Function of Proteins, Institute of Microbiology, Czech Academy of Sciences, Zámek 136, CZ 37333 Nové Hrady, Czech Republic.
| | - Kristýna Slámová
- Laboratory of Biotransformation, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic.
| | - Vladimír Křen
- Laboratory of Biotransformation, Institute of Microbiology, Czech Academy of Sciences, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic.
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5
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Krejzová J, Kalachova L, Šimon P, Pelantová H, Slámová K, Křen V. Inhibition of microbial β-N-acetylhexosaminidases by 4-deoxy- and galacto-analogues of NAG-thiazoline. Bioorg Med Chem Lett 2014; 24:5321-3. [PMID: 25442323 DOI: 10.1016/j.bmcl.2014.09.066] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 09/11/2014] [Accepted: 09/12/2014] [Indexed: 11/24/2022]
Abstract
NAG-thiazoline is a well-established competitive inhibitor of two physiologically relevant glycosidase families-β-N-acetylhexosaminidases (GH20) and β-N-acetylglucosaminidases (GH84). Based on the different substrate flexibilities of these enzyme groups, we designed and synthesized the 4-deoxy derivative of NAG-thiazoline aiming at the selective inhibition of GH20 β-N-acetylhexosaminidases. One GH84 and two GH20 microbial glycosidases were employed as model enzymes for the inhibition assays. Surprisingly, the new compound 4-deoxy-thiazoline exhibited no activity inhibition with either of the enzyme families of interest. Unlike with the substrates, the 4-hydroxyl group of the inhibitor's sugar ring seems to be crucial for binding the inhibitor to the active sites of these enzymes.
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Affiliation(s)
- Jana Krejzová
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic; Department of Biochemistry and Microbiology, Institute of Chemical Technology Prague, Technická 5, CZ 16628 Praha 6, Czech Republic
| | - Lubica Kalachova
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic
| | - Petr Šimon
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic
| | - Helena Pelantová
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic
| | - Kristýna Slámová
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic.
| | - Vladimír Křen
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, CZ 14220 Praha 4, Czech Republic
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6
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Inhibition of GlcNAc-processing glycosidases by C-6-azido-NAG-thiazoline and its derivatives. Molecules 2014; 19:3471-88. [PMID: 24658571 PMCID: PMC6271965 DOI: 10.3390/molecules19033471] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/06/2014] [Accepted: 03/13/2014] [Indexed: 01/13/2023] Open
Abstract
NAG-thiazoline is a strong competitive inhibitor of GH20 β-N-acetyl- hexosaminidases and GH84 β-N-acetylglucosaminidases. Here, we focused on the design, synthesis and inhibition potency of a series of new derivatives of NAG-thiazoline modified at the C-6 position. Dimerization of NAG-thiazoline via C-6 attached triazole linkers prepared by click chemistry was employed to make use of multivalency in the inhibition. Novel compounds were tested as potential inhibitors of β-N-acetylhexosaminidases from Talaromyces flavus, Streptomyces plicatus (both GH20) and β-N-acetylglucosaminidases from Bacteroides thetaiotaomicron and humans (both GH84). From the set of newly prepared NAG-thiazoline derivatives, only C-6-azido-NAG-thiazoline displayed inhibition activity towards these enzymes; C-6 triazole-substituted NAG-thiazolines lacked inhibition activity against the enzymes used. Docking of C-6-azido-NAG-thiazoline into the active site of the tested enzymes was performed. Moreover, a stability study with GlcNAc-thiazoline confirmed its decomposition at pH < 6 yielding 2-acetamido-2-deoxy-1-thio-α/β-D-glucopyranoses, which presumably dimerize oxidatively into S-S linked dimers; decomposition products of NAG-thiazoline are void of inhibitory activity.
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7
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Ito T, Katayama T, Hattie M, Sakurama H, Wada J, Suzuki R, Ashida H, Wakagi T, Yamamoto K, Stubbs KA, Fushinobu S. Crystal structures of a glycoside hydrolase family 20 lacto-N-biosidase from Bifidobacterium bifidum. J Biol Chem 2013; 288:11795-806. [PMID: 23479733 DOI: 10.1074/jbc.m112.420109] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Human milk oligosaccharides contain a large variety of oligosaccharides, of which lacto-N-biose I (Gal-β1,3-GlcNAc; LNB) predominates as a major core structure. A unique metabolic pathway specific for LNB has recently been identified in the human commensal bifidobacteria. Several strains of infant gut-associated bifidobacteria possess lacto-N-biosidase, a membrane-anchored extracellular enzyme, that liberates LNB from the nonreducing end of human milk oligosaccharides and plays a key role in the metabolic pathway of these compounds. Lacto-N-biosidase belongs to the glycoside hydrolase family 20, and its reaction proceeds via a substrate-assisted catalytic mechanism. Several crystal structures of GH20 β-N-acetylhexosaminidases, which release monosaccharide GlcNAc from its substrate, have been determined, but to date, a structure of lacto-N-biosidase is unknown. Here, we have determined the first three-dimensional structures of lacto-N-biosidase from Bifidobacterium bifidum JCM1254 in complex with LNB and LNB-thiazoline (Gal-β1,3-GlcNAc-thiazoline) at 1.8-Å resolution. Lacto-N-biosidase consists of three domains, and the C-terminal domain has a unique β-trefoil-like fold. Compared with other β-N-acetylhexosaminidases, lacto-N-biosidase has a wide substrate-binding pocket with a -2 subsite specific for β-1,3-linked Gal, and the residues responsible for Gal recognition were identified. The bound ligands are recognized by extensive hydrogen bonds at all of their hydroxyls consistent with the enzyme's strict substrate specificity for the LNB moiety. The GlcNAc sugar ring of LNB is in a distorted conformation near (4)E, whereas that of LNB-thiazoline is in a (4)C1 conformation. A possible conformational pathway for the lacto-N-biosidase reaction is discussed.
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Affiliation(s)
- Tasuku Ito
- Department of Biotechnology, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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8
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Vaaje-Kolstad G, Horn SJ, Sørlie M, Eijsink VGH. The chitinolytic machinery ofSerratia marcescens- a model system for enzymatic degradation of recalcitrant polysaccharides. FEBS J 2013; 280:3028-49. [DOI: 10.1111/febs.12181] [Citation(s) in RCA: 210] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 01/30/2013] [Accepted: 02/05/2013] [Indexed: 01/13/2023]
Affiliation(s)
- Gustav Vaaje-Kolstad
- Department of Chemistry; Biotechnology and Food Science; Norwegian University of Life Sciences; Ås; Norway
| | - Svein J. Horn
- Department of Chemistry; Biotechnology and Food Science; Norwegian University of Life Sciences; Ås; Norway
| | - Morten Sørlie
- Department of Chemistry; Biotechnology and Food Science; Norwegian University of Life Sciences; Ås; Norway
| | - Vincent G. H. Eijsink
- Department of Chemistry; Biotechnology and Food Science; Norwegian University of Life Sciences; Ås; Norway
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9
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Krejzová J, Šimon P, Vavříková E, Slámová K, Pelantová H, Riva S, Spiwok V, Křen V. Enzymatic synthesis of new C-6-acylated derivatives of NAG-thiazoline and evaluation of their inhibitor activities towards fungal β-N-acetylhexosaminidase. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.molcatb.2012.10.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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10
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Hattie M, Debowski AW, Stubbs KA. Development of tools to study lacto-N-biosidase: an important enzyme involved in the breakdown of human milk oligosaccharides. Chembiochem 2012; 13:1128-31. [PMID: 22514018 DOI: 10.1002/cbic.201200135] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Indexed: 01/15/2023]
Abstract
Milk and sugar? The elucidation of the catalytic mechanism and the development of the first known inhibitor for lacto-N-biosidases, which are important enzymes involved in the breakdown of human milk oligosaccharides, are described.
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Affiliation(s)
- Mitchell Hattie
- School of Chemistry and Biochemistry, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
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11
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Sumida T, Stubbs KA, Ito M, Yokoyama S. Gaining insight into the inhibition of glycoside hydrolase family 20 exo-β-N-acetylhexosaminidases using a structural approach. Org Biomol Chem 2012; 10:2607-12. [PMID: 22367352 DOI: 10.1039/c2ob06636j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
One useful methodology that has been used to give insight into how chemically synthesized inhibitors bind to enzymes and the reasons underlying their potency is crystallographic studies of inhibitor-enzyme complexes. Presented here is the X-ray structural analysis of a representative family 20 exo-β-N-acetylhexosaminidase in complex with various known classes of inhibitor of these types of enzymes, which highlights how different inhibitor classes can inhibit the same enzyme. This study will aid in the future development of inhibitors of not only exo-β-N-acetylhexosaminidases but also other types of glycoside hydrolases.
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Affiliation(s)
- Tomomi Sumida
- RIKEN Systems and Structural Biology Center, 1-7-22 Suehiro-cho, Tsurumi, Yokohama 230-0045, Japan
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12
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Usuki H, Yamamoto Y, Kumagai Y, Nitoda T, Kanzaki H, Hatanaka T. MS/MS fragmentation-guided search of TMG-chitooligomycins and their structure–activity relationship in specific β-N-acetylglucosaminidase inhibition. Org Biomol Chem 2011; 9:2943-51. [DOI: 10.1039/c0ob01090a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Slámová K, Bojarová P, Petrásková L, Křen V. β-N-Acetylhexosaminidase: What's in a name…? Biotechnol Adv 2010; 28:682-93. [DOI: 10.1016/j.biotechadv.2010.04.004] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 04/17/2010] [Accepted: 04/24/2010] [Indexed: 01/28/2023]
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14
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Goddard-Borger ED, Stubbs KA. An improved route to PUGNAc and its galacto-configured congener. J Org Chem 2010; 75:3931-4. [PMID: 20443616 DOI: 10.1021/jo100614b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
An efficient, scalable, and reliable synthesis of PUGNAc and its galacto-configured congener is reported.
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Affiliation(s)
- Ethan D Goddard-Borger
- Chemistry M313, School of Biomedical, Biomolecular and Chemical Sciences, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
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15
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Kim EJ, Love DC, Darout E, Abdo M, Rempel B, Withers SG, Rablen PR, Hanover JA, Knapp S. OGA inhibition by GlcNAc-selenazoline. Bioorg Med Chem 2010; 18:7058-64. [PMID: 20822912 DOI: 10.1016/j.bmc.2010.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2010] [Revised: 08/03/2010] [Accepted: 08/04/2010] [Indexed: 12/26/2022]
Abstract
The title compound, which differs from the powerful O-GlcNAcase (OGA) inhibitor GlcNAc-thiazoline only at the chalcogen atom (Se for S), is a much weaker inhibitor in a direct OGA assay. In human cells, however, the selenazoline shows comparable ability to induce hyper-O-GlcNAc-ylation, and the two show similar reduction of insulin-stimulated translocation of glucose transporter 4 in differentiated 3T3 adipocytes.
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Affiliation(s)
- Eun Ju Kim
- Department of Science Education-Chemistry Major, Daegu University, Gyeongbuk 712-714, Republic of Korea
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16
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Knapp S, Fash D, Abdo M, Emge TJ, Rablen PR. GlcNAc-Thiazoline conformations. Bioorg Med Chem 2009; 17:1831-6. [PMID: 19223181 DOI: 10.1016/j.bmc.2009.01.066] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 01/22/2009] [Accepted: 01/24/2009] [Indexed: 11/25/2022]
Abstract
The title compound, a powerful inhibitor of retaining N-acetylhexosaminidases, can move freely among three pyranose solution conformations of similar energy-two twist boats and the (4)C(1) chair-as revealed by NMR, calculational, and crystallographic studies. It binds in the enzyme active site only in the pseudo-(4)C(1) conformation, however, in which it most closely resembles the hypothetical bound substrate transition state, a (4)E sofa that is approximately trigonal bipyramidal at the anomeric carbon.
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Affiliation(s)
- Spencer Knapp
- Department of Chemistry and Chemical Biology, Rutgers The State University of New Jersey, Piscataway, NJ 08854, USA.
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17
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Stubbs K, Macauley M, Vocadlo D. A Selective Inhibitor Gal-PUGNAc of Human Lysosomal β-Hexosaminidases Modulates Levels of the Ganglioside GM2 in Neuroblastoma Cells. Angew Chem Int Ed Engl 2009; 48:1300-3. [DOI: 10.1002/anie.200804583] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Stubbs K, Macauley M, Vocadlo D. A Selective Inhibitor Gal-PUGNAc of Human Lysosomal β-Hexosaminidases Modulates Levels of the Ganglioside GM2 in Neuroblastoma Cells. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200804583] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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López Ó, Zafra E, Maya I, Fuentes J, Diánez MJ, Estrada MD, Pérez-Garrido S, Fernández-Bolaños JG. cis-Fused bicyclic sugar thiocarbamates. Reactivity towards amines. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.09.093] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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