151
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Talancé VLD, Massinon O, Baati R, Wagner A, Vincent SP. First steps towards conformationally selective artificial lectins: the chair-boat discrimination by molecularly imprinted polymers. Chem Commun (Camb) 2012; 48:10684-6. [DOI: 10.1039/c2cc35386e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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152
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Merino-Montiel P, López Ó, Fernández-Bolaños JG. Unprecedented spiro-annelated sugar isoureas, guanidines and amidines as new families of glycosidase inhibitors. RSC Adv 2012. [DOI: 10.1039/c2ra21561f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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153
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Kyne SH, Miles JAL, Percy JM, Singh K. Executing and Rationalizing the Synthesis of a Difluorinated Analogue of a Ring-Expanded Calystegine B2. J Org Chem 2011; 77:991-8. [DOI: 10.1021/jo2022845] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sara H. Kyne
- WestCHEM, Department of Pure
and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U. K
| | - Jonathan A. L. Miles
- Department of Chemistry, University of Leicester, University Road, Leicester
LE1 7RH, U. K
| | - Jonathan M. Percy
- WestCHEM, Department of Pure
and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U. K
| | - Kuldip Singh
- Department of Chemistry, University of Leicester, University Road, Leicester
LE1 7RH, U. K
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154
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Manavalan A, Adav SS, Sze SK. iTRAQ-based quantitative secretome analysis of Phanerochaete chrysosporium. J Proteomics 2011; 75:642-54. [DOI: 10.1016/j.jprot.2011.09.001] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 08/11/2011] [Accepted: 09/03/2011] [Indexed: 10/17/2022]
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155
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Lieberman RL. A Guided Tour of the Structural Biology of Gaucher Disease: Acid-β-Glucosidase and Saposin C. Enzyme Res 2011; 2011:973231. [PMID: 22145077 PMCID: PMC3226326 DOI: 10.4061/2011/973231] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Accepted: 09/07/2011] [Indexed: 01/27/2023] Open
Abstract
Mutations in both acid-β-glucosidase (GCase) and saposin C lead to Gaucher disease, the most common lysosomal storage disorder. The past several years have seen an explosion of structural and biochemical information for these proteins, which have provided new insight into the biology and pathogenesis of Gaucher disease, as well as opportunities for new therapeutic directions. Nearly 20 crystal structures of GCase are now available, from different heterologous sources, complexed with different ligands in the active site, in different glycosylation states, as well as one that harbors a prevalent disease-causing mutation, N370S. For saposin C, two NMR and 3 crystal structures have been solved, each with its unique snapshot. This review focuses on the details of these structures to highlight salient common and disparate features that contribute to our current state of knowledge of this complex orphan disease.
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Affiliation(s)
- Raquel L. Lieberman
- School of Chemistry & Biochemistry, Institute for Bioscience and Bioengineering, Georgia Institute of Technology, 901 Atlantic Drive NW Atlanta, GA 30332-0400, USA
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156
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Crich D. Methodology development and physical organic chemistry: a powerful combination for the advancement of glycochemistry. J Org Chem 2011; 76:9193-209. [PMID: 21919522 PMCID: PMC3215858 DOI: 10.1021/jo2017026] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This Perspective outlines work in the Crich group on the diastereoselective synthesis of the so-called difficult classes of glycosidic bond: the 2-deoxy-β-glycopyranosides, the β-mannopyranosides, the α-sialosides, the α-glucopyranosides, and the β-arabinofuranosides with an emphasis on the critical interplay between mechanism and methodology development.
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Affiliation(s)
- David Crich
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202, USA.
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157
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Rönnols J, Burkhardt A, Cumpstey I, Widmalm G. pKa-Determination and Conformational Studies by NMR Spectroscopy of D-Altrose-Containing and other Pseudodisaccharides as Glycosidase Inhibitor Candidates. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101385] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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158
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Orwig SD, Tan YL, Grimster NP, Yu Z, Powers ET, Kelly JW, Lieberman RL. Binding of 3,4,5,6-tetrahydroxyazepanes to the acid-β-glucosidase active site: implications for pharmacological chaperone design for Gaucher disease. Biochemistry 2011; 50:10647-57. [PMID: 22047104 DOI: 10.1021/bi201619z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Pharmacologic chaperoning is a therapeutic strategy being developed to improve the cellular folding and trafficking defects associated with Gaucher disease, a lysosomal storage disorder caused by point mutations in the gene encoding acid-β-glucosidase (GCase). In this approach, small molecules bind to and stabilize mutant folded or nearly folded GCase in the endoplasmic reticulum (ER), increasing the concentration of folded, functional GCase trafficked to the lysosome where the mutant enzyme can hydrolyze the accumulated substrate. To date, the pharmacologic chaperone (PC) candidates that have been investigated largely have been active site-directed inhibitors of GCase, usually containing five- or six-membered rings, such as modified azasugars. Here we show that a seven-membered, nitrogen-containing heterocycle (3,4,5,6-tetrahydroxyazepane) scaffold is also promising for generating PCs for GCase. Crystal structures reveal that the core azepane stabilizes GCase in a variation of its proposed active conformation, whereas binding of an analogue with an N-linked hydroxyethyl tail stabilizes GCase in a conformation in which the active site is covered, also utilizing a loop conformation not seen previously. Although both compounds preferentially stabilize GCase to thermal denaturation at pH 7.4, reflective of the pH in the ER, only the core azepane, which is a mid-micromolar competitive inhibitor, elicits a modest increase in enzyme activity for the neuronopathic G202R and the non-neuronopathic N370S mutant GCase in an intact cell assay. Our results emphasize the importance of the conformational variability of the GCase active site in the design of competitive inhibitors as PCs for Gaucher disease.
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Affiliation(s)
- Susan D Orwig
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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159
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A neutral diphosphate mimic crosslinks the active site of human O-GlcNAc transferase. Nat Chem Biol 2011; 8:72-7. [PMID: 22082911 PMCID: PMC3241908 DOI: 10.1038/nchembio.711] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 08/31/2011] [Indexed: 12/29/2022]
Abstract
Glycosyltransferases (Gtfs) catalyze the formation of a diverse array of glycoconjugates. Small molecule inhibitors to manipulate Gtf activity in cells have long been sought as tools to understand Gtf function. Success has been limited due to challenges in designing inhibitors that mimic the negatively-charged diphosphate substrates. Here we report the mechanism of action of a small molecule that inhibits O-GlcNAc transferase (OGT), an essential human enzyme that modulates cell signaling pathways by catalyzing a unique intracellular post translational modification, β-O-GlcNAcylation. The molecule contains a five heteroatom dicarbamate core that functions as a neutral diphosphate mimic. One dicarbamate carbonyl reacts with an essential active site lysine that anchors the diphosphate of the nucleotide-sugar substrate. The lysine adduct reacts again with a nearby cysteine to crosslink the OGT active site. While this unprecedented mechanism reflects the unique architecture of the OGT active site, related dicarbamate scaffolds may inhibit other enzymes that bind diphosphate containing substrates.
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160
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Decroocq C, Rodríguez-Lucena D, Russo V, Mena Barragán T, Ortiz Mellet C, Compain P. The Multivalent Effect in Glycosidase Inhibition: Probing the Influence of Architectural Parameters with Cyclodextrin-based Iminosugar Click Clusters. Chemistry 2011; 17:13825-31. [DOI: 10.1002/chem.201102266] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Indexed: 11/08/2022]
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161
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Schramm VL. Enzymatic transition states, transition-state analogs, dynamics, thermodynamics, and lifetimes. Annu Rev Biochem 2011; 80:703-32. [PMID: 21675920 DOI: 10.1146/annurev-biochem-061809-100742] [Citation(s) in RCA: 165] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Experimental analysis of enzymatic transition-state structures uses kinetic isotope effects (KIEs) to report on bonding and geometry differences between reactants and the transition state. Computational correlation of experimental values with chemical models permits three-dimensional geometric and electrostatic assignment of transition states formed at enzymatic catalytic sites. The combination of experimental and computational access to transition-state information permits (a) the design of transition-state analogs as powerful enzymatic inhibitors, (b) exploration of protein features linked to transition-state structure, (c) analysis of ensemble atomic motions involved in achieving the transition state, (d) transition-state lifetimes, and (e) separation of ground-state (Michaelis complexes) from transition-state effects. Transition-state analogs with picomolar dissociation constants have been achieved for several enzymatic targets. Transition states of closely related isozymes indicate that the protein's dynamic architecture is linked to transition-state structure. Fast dynamic motions in catalytic sites are linked to transition-state generation. Enzymatic transition states have lifetimes of femtoseconds, the lifetime of bond vibrations. Binding isotope effects (BIEs) reveal relative reactant and transition-state analog binding distortion for comparison with actual transition states.
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Affiliation(s)
- Vern L Schramm
- Department of Biochemistry, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
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162
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Burland PA, Osborn HM, Turkson A. Synthesis and glycosidase inhibitory profiles of functionalised morpholines and oxazepanes. Bioorg Med Chem 2011; 19:5679-92. [DOI: 10.1016/j.bmc.2011.07.019] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2011] [Revised: 07/06/2011] [Accepted: 07/10/2011] [Indexed: 12/12/2022]
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163
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Saibi W, Gargouri A. Hydroxyl distribution in sugar structure and its contributory role in the inhibition of Stachybotrys microspora β-glucosidase (bglG). Carbohydr Res 2011; 346:1848-54. [DOI: 10.1016/j.carres.2011.06.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2011] [Revised: 06/08/2011] [Accepted: 06/14/2011] [Indexed: 11/29/2022]
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164
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Lee SS, Hong SY, Errey JC, Izumi A, Davies GJ, Davis BG. Mechanistic evidence for a front-side, SNi-type reaction in a retaining glycosyltransferase. Nat Chem Biol 2011; 7:631-8. [DOI: 10.1038/nchembio.628] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Accepted: 06/10/2011] [Indexed: 01/14/2023]
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165
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Clark LF, Johnson JV, Horenstein NA. Identification of a Gene Cluster that Initiates Azasugar Biosynthesis in Bacillus amyloliquefaciens. Chembiochem 2011; 12:2147-50. [DOI: 10.1002/cbic.201100347] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Indexed: 11/10/2022]
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166
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Saibi W, Gargouri A. Cellobiose dehydrogenase influences the production of S. microspora β-glucosidase. World J Microbiol Biotechnol 2011; 28:23-9. [PMID: 22806776 DOI: 10.1007/s11274-011-0787-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2011] [Accepted: 05/09/2011] [Indexed: 12/16/2022]
Abstract
BglG, a Stachybotrys microspora β-glucosidase produced in the presence of glucose and cellobiose, was used individually as sole carbon source. The time course synthesis of BglG showed two aspects: (1) an exponential curve, observed in glucose Mandels medium, and (2) a cloche curve, observed in cellobiose containing cultures. A decrease was observed in bglG production at the 6th, 8th and 10th days during mycelium growth in cellobiose Mandels medium, which allowed for the assumption that the anabolism of a bglG inhibitor factor was produced with cellobiose but not with glucose. Cellobiose dehydrogenases (CDH) activity was, on another hand detected in cellobiose grown cultures but not in glucose containing ones. The aliquots, withdrawn at the time course of bglG production in the presence of cellobiose, gave rise to an inhibitory effect on bglG activity. This result was obtained with and without the heat treatment (5 min at 100°C) of the aliquots, which supported the non-proteinaceous nature of the inhibitor factor. Furthermore, sugar chromatographic analyses revealed the appearance of a secondary metabolite in the cellobiose Mandels medium and indicated that the factor behind the bglG activity cloche curve was a δ-gluconolactone. Seeing that the latter follows a strong inhibitory effect on bglG activity, it is speculated that the decrease in bglG activity during the time course of bglG synthesis in cellobiose Mandels medium is assigned to the release of δ-gluconolactone. This paper presents and validates an explanatory model for this hypothesis.
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Affiliation(s)
- Walid Saibi
- Laboratoire de Valorisation de la Biomasse et Production de Protéines chez les Eucaryotes, Centre de Biotechnologie de Sfax, Université de Sfax, B.P'1177', 3018, Sfax, Tunisia.
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167
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Lammerts van Bueren A, Ficko-Blean E, Pluvinage B, Hehemann JH, Higgins M, Deng L, Ogunniyi A, Stroeher U, El Warry N, Burke R, Czjzek M, Paton J, Vocadlo D, Boraston A. The Conformation and Function of a Multimodular Glycogen-Degrading Pneumococcal Virulence Factor. Structure 2011; 19:640-51. [DOI: 10.1016/j.str.2011.03.001] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 02/22/2011] [Accepted: 03/03/2011] [Indexed: 11/28/2022]
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168
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Roldós V, Cañada FJ, Jiménez-Barbero J. Carbohydrate-Protein Interactions: A 3D View by NMR. Chembiochem 2011; 12:990-1005. [DOI: 10.1002/cbic.201000705] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Indexed: 12/29/2022]
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169
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Trapero A, Alfonso I, Butters TD, Llebaria A. Polyhydroxylated Bicyclic Isoureas and Guanidines Are Potent Glucocerebrosidase Inhibitors and Nanomolar Enzyme Activity Enhancers in Gaucher Cells. J Am Chem Soc 2011; 133:5474-84. [DOI: 10.1021/ja111480z] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Ana Trapero
- Research Unit on Bioactive Molecules (RUBAM), Departament de Química Biomèdica, Institut de Química Avançada de Catalunya (IQAC−CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Ignacio Alfonso
- Departament de Química Biològica y Modelització Molecular, IQAC−CSIC, Jordi Girona 18-26, 08034, Barcelona, Spain
| | - Terry D. Butters
- Oxford Glycobiology Institute, Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, United Kingdom
| | - Amadeu Llebaria
- Research Unit on Bioactive Molecules (RUBAM), Departament de Química Biomèdica, Institut de Química Avançada de Catalunya (IQAC−CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
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170
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171
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GlaxoSmithKline Award Lecture. The O-GlcNAc modification: three-dimensional structure, enzymology and the development of selective inhibitors to probe disease. Biochem Soc Trans 2011; 38:1179-88. [PMID: 20863281 DOI: 10.1042/bst0381179] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Carbohydrates, their structures and the enzymes responsible for their synthesis and degradation, offer numerous possibilities for the design and application of probes with which to study and treat disease. The intracellular dynamic O-GlcNAc (O-linked β-N-acetylglucosamine) modification is one such glycosylation with considerable medical interest, reflecting its implication in diseases such as Type 2 diabetes and neurodegeneration. In the present paper, we review recent structural and mechanistic studies into the enzymes responsible for this modification, highlighting how mechanism-inspired small-molecule probes may be applied to study potential disease processes. Such studies have questioned a causal link between O-GlcNAc and Type 2 diabetes, but do offer potential for the study, and perhaps the treatment, of tauopathies.
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172
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173
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Goddard-Borger ED, Carapito R, Jeltsch JM, Phalip V, Stick RV, Varrot A. α-l-Arabinofuranosylated pyrrolidines as arabinanase inhibitors. Chem Commun (Camb) 2011; 47:9684-6. [DOI: 10.1039/c1cc13675e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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174
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John Pal AP, Kadigachalam P, Mallick A, Doddi VR, Vankar YD. Synthesis of sugar-derived spiroaminals via lactamization and metathesis reactions. Org Biomol Chem 2011; 9:809-19. [DOI: 10.1039/c0ob00555j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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175
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John Pal AP, Gupta P, Suman Reddy Y, Vankar YD. Synthesis of Fused Oxa-Aza Spiro Sugars from D-Glucose-Derived δ-Lactone as Glycosidase Inhibitors. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001102] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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176
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Bowen EG, Wardrop DJ. Diastereoselective nitrenium ion-mediated cyclofunctionalization: total synthesis of (+)-castanospermine. Org Lett 2010; 12:5330-3. [PMID: 20964285 DOI: 10.1021/ol102371x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The asymmetric total synthesis of the α-glucosidase inhibitor (+)-castanospermine is reported. The central theme in our approach to this polyhydroxylated alkaloid is the simultaneous generation of the piperidine ring and the C-1/8a erythro stereodiad through the diastereoselective, oxamidation of an unsaturated O-alkyl hydroxamate. This process is believed to proceed sequentially via singlet acylnitrenium and aziridinium ion intermediates.
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Affiliation(s)
- Edward G Bowen
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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177
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Eskandari R, Jones K, Rose DR, Pinto BM. Probing the active-site requirements of human intestinal N-terminal maltase glucoamylase: The effect of replacing the sulfate moiety by a methyl ether in ponkoranol, a naturally occurring α-glucosidase inhibitor. Bioorg Med Chem Lett 2010; 20:5686-9. [DOI: 10.1016/j.bmcl.2010.08.020] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Revised: 08/03/2010] [Accepted: 08/04/2010] [Indexed: 10/19/2022]
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178
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Hitaoka S, Harada M, Yoshida T, Chuman H. Correlation Analyses on Binding Affinity of Sialic Acid Analogues with Influenza Virus Neuraminidase-1 Using ab Initio MO Calculations on Their Complex Structures. J Chem Inf Model 2010; 50:1796-805. [DOI: 10.1021/ci100225b] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seiji Hitaoka
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Masataka Harada
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Tatsusada Yoshida
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
| | - Hiroshi Chuman
- Institute of Health Biosciences, The University of Tokushima Graduate School, 1-78 Shomachi, Tokushima 770-8505, Japan
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179
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Gunasundari T, Chandrasekaran S. Enantioselective and Protecting Group-Free Synthesis of 1-Deoxythionojirimycin, 1-Deoxythiomannojirimycin, and 1-Deoxythiotalonojirimycin. J Org Chem 2010; 75:6685-8. [DOI: 10.1021/jo1010125] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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180
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Mahapatra T, Nanda S. Asymmetric synthesis of hydroxy-skipped bishomo-inositols as potential glycosidase inhibitors. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.07.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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181
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Bonaccini C, Chioccioli M, Parmeggiani C, Cardona F, Lo Re D, Soldaini G, Vogel P, Bello C, Goti A, Gratteri P. Synthesis, Biological Evaluation and Docking Studies of Casuarine Analogues: Effects of Structural Modifications at Ring B on Inhibitory Activity Towards Glucoamylase. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000632] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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182
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He Y, Bubb AK, Stubbs KA, Gloster TM, Davies GJ. Inhibition of a bacterial O-GlcNAcase homologue by lactone and lactam derivatives: structural, kinetic and thermodynamic analyses. Amino Acids 2010; 40:829-39. [PMID: 20689974 DOI: 10.1007/s00726-010-0700-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 07/13/2010] [Indexed: 11/26/2022]
Abstract
The dynamic, intracellular, O-GlcNAc modification is of continuing interest and one whose study through targeted "chemical genetics" approaches is set to increase. Of particular importance is the inhibition of the O-GlcNAc hydrolase, O-GlcNAcase (OGA), since this provides a route to elevate cellular O-GlcNAc levels, and subsequent phenotypic evaluation. Such a small molecule approach complements other methods and potentially avoids changes in protein-protein interactions that manifest themselves in molecular biological approaches to O-GlcNAc transferase knockout or over-expression. Here we describe the kinetic, thermodynamic and three-dimensional structural analysis of a bacterial OGA analogue from Bacteroides thetaiotaomicron, BtGH84, in complex with a lactone oxime (LOGNAc) and a lactam form of N-acetylglucosamine and compare their binding signatures with that of the more potent inhibitor O-(2-acetamido-2-deoxy-D-glucopyranosylidene)amino N-phenyl carbamate (PUGNAc). We show that both LOGNAc and the N-acetyl gluconolactam are significantly poorer inhibitors than PUGNAc, which may reflect poorer mimicry of transition state geometry and steric clashes with the enzyme upon binding; drawbacks that the phenyl carbamate adornment of PUGNAc helps mitigate. Implications for the design of future generations of inhibitors are discussed.
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Affiliation(s)
- Yuan He
- York Structural Biology Laboratory, Department of Chemistry, The University of York, York, UK
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183
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Frantom PA, Coward JK, Blanchard JS. UDP-(5F)-GlcNAc acts as a slow-binding inhibitor of MshA, a retaining glycosyltransferase. J Am Chem Soc 2010; 132:6626-7. [PMID: 20411981 DOI: 10.1021/ja101231a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Glycosyltransferase enzymes play important roles in numerous cellular pathways. Despite their participation in many therapeutically relevant pathways, there is a paucity of information on how to effectively inhibit this class of enzymes. Here we report that UDP-(5F)-GlcNAc acts as a slow-binding, competitive inhibitor of the retaining glycosyltransferase MshA from Corynebacterium glutamicum (K(i) approximately 1.6 muM). The kinetic data are consistent with a single-step inhibition mechanism whose equilibration is slow relative to catalysis. We believe that this is the first slow-onset inhibitor to be reported for the glycosyltransferase family of enzymes. The potent inhibition of the enzyme by the fluoro-substituted substrate is consistent with the involvement of an oxocarbenium transition-state structure, which has been previously proposed for this family of enzymes. Additionally, although several members of the GT-B enzyme family, including MshA, have been shown to undergo a conformational change upon UDP-GlcNAc binding, the kinetic data are inconsistent with a two-step inhibition mechanism. This suggests that there may be other conformations of the enzyme that are useful for the design of inhibitors against the large family of GT-B glycosyltransferase enzymes.
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Affiliation(s)
- Patrick A Frantom
- Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA.
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184
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Lammerts van Bueren A, Popat SD, Lin CH, Davies GJ. Structural and Thermodynamic Analyses of α-L-Fucosidase Inhibitors. Chembiochem 2010; 11:1971-4. [DOI: 10.1002/cbic.201000339] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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185
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Compain P, Decroocq C, Iehl J, Holler M, Hazelard D, Mena Barragán T, Ortiz Mellet C, Nierengarten JF. Glycosidase Inhibition with Fullerene Iminosugar Balls: A Dramatic Multivalent Effect. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002802] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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186
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Compain P, Decroocq C, Iehl J, Holler M, Hazelard D, Mena Barragán T, Ortiz Mellet C, Nierengarten JF. Glycosidase Inhibition with Fullerene Iminosugar Balls: A Dramatic Multivalent Effect. Angew Chem Int Ed Engl 2010; 49:5753-6. [DOI: 10.1002/anie.201002802] [Citation(s) in RCA: 163] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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187
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Synthesis of 3,5-diazabicyclo [5.1.0] octenes. A new platform to mimic glycosidase transition states. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.05.064] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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188
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Synthesis of α- and β-d-glucopyranosyl triazoles by CuAAC ‘click chemistry’: reactant tolerance, reaction rate, product structure and glucosidase inhibitory properties. Carbohydr Res 2010; 345:1123-34. [DOI: 10.1016/j.carres.2010.03.041] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2010] [Revised: 03/25/2010] [Accepted: 03/31/2010] [Indexed: 11/21/2022]
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189
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Desmet T, Claeyssens M, Piens K, Nerinckx W. Synthesis and Evaluation of 2-Deoxy-2-amino-β-cellobiosides as Cellulase Inhibitors. J Carbohydr Chem 2010. [DOI: 10.1080/07328303.2010.508142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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190
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Wardrop DJ, Waidyarachchi SL. Synthesis and biological activity of naturally occurring α-glucosidase inhibitors. Nat Prod Rep 2010; 27:1431-68. [DOI: 10.1039/b914958a] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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