51
|
Lu SR, Lai YH, Chen JH, Liu CY, Mong KKT. Dimethylformamide: An Unusual Glycosylation Modulator. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201100076] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
52
|
Lu SR, Lai YH, Chen JH, Liu CY, Mong KKT. Dimethylformamide: An Unusual Glycosylation Modulator. Angew Chem Int Ed Engl 2011; 50:7315-20. [DOI: 10.1002/anie.201100076] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Revised: 05/18/2011] [Indexed: 11/08/2022]
|
53
|
An ultrasonication-assisted extraction and derivatization protocol for GC/TOFMS-based metabolite profiling. Anal Bioanal Chem 2011; 400:1405-17. [PMID: 21448603 DOI: 10.1007/s00216-011-4880-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2010] [Revised: 02/02/2011] [Accepted: 03/07/2011] [Indexed: 10/18/2022]
Abstract
Conventional chemical derivatization of metabolites in biological specimens is time-consuming, which limits the throughput and efficiency of metabolite profiling using a gas chromatography/time-of-flight mass spectrometry (GC/TOFMS) platform. We report an ultrasonication-assisted protocol which reduces the derivatization time from hours to about 30 min and significantly enhances the derivatization efficiency prior to a GC/TOFMS analysis. The protocol was evaluated using 40 compounds representing different classes of human metabolites, and demonstrated good analytical precision and accuracy. In comparison with the conventional method, the new protocol was able to increase the intensity of most of the identified peaks (71.0%) in the GC/TOFMS chromatograms of human serum samples. The detected compounds with increased intensity include most amino acids, keto-containing organic acids, carbonyl-containing carbohydrates, and unsaturated fatty acids. We applied this protocol in a metabolomic study of human serum samples obtained from 34 patients diagnosed with hypertension and 29 age- and gender-matched healthy subjects. Metabolite markers associated with hypertension, including glucosamine, D-sorbitol, 1-stearoylglycerol, and homocysteine, were identified and validated by statistical methods and use of reference standards. Our work highlights the potential of this novel approach for the large-scale metabolite profiling of samples generated from plant, animal, and clinical and epidemiological studies.
Collapse
|
54
|
Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for the period 2005-2006. MASS SPECTROMETRY REVIEWS 2011; 30:1-100. [PMID: 20222147 DOI: 10.1002/mas.20265] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This review is the fourth update of the original review, published in 1999, on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2006. The review covers fundamental studies, fragmentation of carbohydrate ions, method developments, and applications of the technique to the analysis of different types of carbohydrate. Specific compound classes that are covered include carbohydrate polymers from plants, N- and O-linked glycans from glycoproteins, glycated proteins, glycolipids from bacteria, glycosides, and various other natural products. There is a short section on the use of MALDI-TOF mass spectrometry for the study of enzymes involved in glycan processing, a section on industrial processes, particularly the development of biopharmaceuticals and a section on the use of MALDI-MS to monitor products of chemical synthesis of carbohydrates. Large carbohydrate-protein complexes and glycodendrimers are highlighted in this final section.
Collapse
Affiliation(s)
- David J Harvey
- Department of Biochemistry, Oxford Glycobiology Institute, University of Oxford, Oxford OX1 3QU, UK.
| |
Collapse
|
55
|
Spain SG, Cameron NR. The binding of polyvalent galactosides to the lectin Ricinus communis agglutinin 120 (RCA120): an ITC and SPR study. Polym Chem 2011. [DOI: 10.1039/c1py00030f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
56
|
Hu AL, Yang W, Xu HH. Novel fluorescent conjugate containing glucose and NBD and its carrier-mediated uptake by tobacco cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY. B, BIOLOGY 2010; 101:215-23. [PMID: 20692850 DOI: 10.1016/j.jphotobiol.2010.07.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 07/09/2010] [Accepted: 07/09/2010] [Indexed: 02/01/2023]
Abstract
Some compounds that contain glucose groups can be transported across the plasma membrane into the cells through hexose transporters. To test the hypothesis that glucose-conjugated insecticides also have similar uptake and translocation properties, a novel fluorescent conjugate (12) was prepared by conjugating glucose and 7-nitrobenz-2-oxa-1,3-diazole with 4-iodo-1-phenylpyrazoles. Its fluorescence spectra and uptake by suspension-cultured tobacco (Nicotiana tabacum L.cv.) cells were studied. The fluorescence spectra showed long wavelengths with maximum emission at 530nm. After incubating tobacco cell suspensions in 10μM conjugate for 0.5h, green fluorescence of 12 was clearly visible in the cells under fluorescence microscopy. After 2h of incubation, more than 70% of 12 was absorbed. Carbonyl cyanide m-chlorophenylhydrazone, phloridzin and glucose drastically inhibited uptake. In concentration-dependent uptakes, the uptake rate of 12 showed a saturable component and was in accordance with Michaelis-Menten kinetics. The results proved that the glucose moiety can guide 12 into tobacco cells and that hexose transporters mediated the uptake.
Collapse
Affiliation(s)
- An-Long Hu
- South China Agricultural University, Guangzhou, Guangdong 510642, China
| | | | | |
Collapse
|
57
|
Synthesis of the hexasaccharide repeating unit corresponding to the cell wall lipopolysaccharide of Azospirillum irakense KBC1. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
58
|
|
59
|
Jones RA, Davidson R, Tran AT, Smith N, Carmen Galan M. Iodine-catalyzed one-pot acetalation–esterification reaction for the preparation of orthogonally protected glycosides. Carbohydr Res 2010; 345:1842-5. [DOI: 10.1016/j.carres.2010.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2010] [Revised: 06/17/2010] [Accepted: 07/04/2010] [Indexed: 10/19/2022]
|
60
|
Synthesis of Hybrid Peptidomimetics and Neoglycoconjugates Employing Click Protocol: Dual Utility of Poc-Group for Inserting Carbamate-Triazole Units into Peptide Backbone. Int J Pept Res Ther 2010. [DOI: 10.1007/s10989-010-9228-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
61
|
Combination of solid phase and solution phase synthesis of oligosaccharides using sonication. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.06.027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
62
|
Yang L, Ye XS. A highly alpha-selective glycosylation for the convenient synthesis of repeating alpha-(1-->4)-linked N-acetyl-galactosamine units. Carbohydr Res 2010; 345:1713-21. [PMID: 20591420 DOI: 10.1016/j.carres.2010.05.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2010] [Revised: 05/24/2010] [Accepted: 05/31/2010] [Indexed: 11/24/2022]
Abstract
The repeating GalpNAc-alpha-(1-->4)-GalpNAc unit is part of a series of essential structures that can be found in many important biomolecules such as the glycoproteins and the O-antigenic polysaccharides of clinically important bacterial strains. In this paper, we describe an exclusive alpha-selective glycosylation reaction, using a 4,6-di-O-tert-butyldimethylsilyl-N-acetyloxazolidinone-protected thioglycoside as the glycosyl donor, under pre-activation conditions, with only half amount of the promoter, providing the product GalpNAc-alpha-(1-->4)-GalpNAc in high isolated yield. This reaction can be also applied to increasing the length of the repeating structure, which is of significant use in further synthesis of branched or linear oligosaccharides.
Collapse
Affiliation(s)
- Lin Yang
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Xue Yuan Road 38, Beijing 100191, China
| | | |
Collapse
|
63
|
Krag J, Christiansen MS, Petersen JG, Jensen HH. Direct chemical glycosylation with pentenyl- and thioglycoside donors of N-acetylglucosamine. Carbohydr Res 2010; 345:872-9. [PMID: 20304386 DOI: 10.1016/j.carres.2010.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 02/10/2010] [Accepted: 02/16/2010] [Indexed: 10/19/2022]
Abstract
The use of pentenyl and thiophenyl glycosides of N-acetylglucosamine (GlcNAc) as glycosyl donors for the direct preparation of O-glycosides of GlcNAc promoted by N-iodosuccinimide (NIS) and metal triflates in dichloromethane has been investigated. Both glycosyl acceptors 1-octanol and (-)-menthol resulted in good glycosylation yields for both types of donors with pentenyl glycosides being somewhat superior in terms of yield. Carbohydrate-based acceptors were reacted with a benzylated GlcNAc-pentenyl donor but only provided disaccharides in poor to moderate yields. The results show that a variety of metal triflates are capable of acting as an activator for both NIS and the intermediate oxazoline.
Collapse
Affiliation(s)
- Jonas Krag
- Department of Chemistry, Aarhus University, Langelandsgade 140, DK-8000 Aarhus C, Denmark
| | | | | | | |
Collapse
|
64
|
Wang P, Zhu J, Yuan Y, Danishefsky SJ. Total synthesis of the 2,6-sialylated immunoglobulin G glycopeptide fragment in homogeneous form. J Am Chem Soc 2010; 131:16669-71. [PMID: 19886622 DOI: 10.1021/ja907136d] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The 2,6-sialylated tridecasaccharide 1 associated with the Fc fragment of intravenous immunoglobulin has been synthesized.
Collapse
Affiliation(s)
- Ping Wang
- Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, New York 10065, USA
| | | | | | | |
Collapse
|
65
|
|
66
|
Rowan AS, Nicely NI, Cochrane N, Wlassoff WA, Claiborne A, Hamilton CJ. Nucleoside triphosphate mimicry: a sugar triazolyl nucleoside as an ATP-competitive inhibitor of B. anthracis pantothenate kinase. Org Biomol Chem 2009; 7:4029-36. [PMID: 19763307 PMCID: PMC6074028 DOI: 10.1039/b909729e] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of a library of nucleoside triphosphate mimetics is described where the Mg(2+) chelated triphosphate sidechain is replaced by an uncharged methylene-triazole linked monosaccharide sidechain. The compounds have been evaluated as inhibitors of Bacillus anthracis pantothenate kinase and a competitive inhibitor has been identified with a K(i) that is 3-fold lower than the K(m) value of ATP.
Collapse
Affiliation(s)
- Andrew S Rowan
- School of Chemistry and Chemical Engineering, David Keir Building, Stranmillis Road, Queen's University Belfast, Belfast, BT9 5AG
| | | | | | | | | | | |
Collapse
|
67
|
Abstract
We have investigated the use of sonication for the synthesis of oligomannosides. A convenient sonication-mediated glycosylation protocol that is applicable to traditional glycosylation methods has been developed. This protocol can be applicable for activating glycosyl donors that are known to have low reactivity which enable the synthesis of oligomannosides of particular biological interest with the same efficiency.
Collapse
Affiliation(s)
- Christabel T Tanifum
- Department of Chemistry and Biochemistry, Utah State University, 0300 Old Main Hill, Logan, Utah 84322-0300, USA
| | | |
Collapse
|
68
|
Coumarins Preparation by Pechmann Reaction Under Ultrasound Irradiation. Synthesis of Hymecromone as Insecticide Intermediate. Catal Letters 2008. [DOI: 10.1007/s10562-008-9709-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
69
|
Weïwer M, Sherwood T, Green DE, Chen M, DeAngelis PL, Liu J, Linhardt RJ. Synthesis of uridine 5'-diphosphoiduronic acid: a potential substrate for the chemoenzymatic synthesis of heparin. J Org Chem 2008; 73:7631-7. [PMID: 18759479 PMCID: PMC2639712 DOI: 10.1021/jo801409c] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An improved understanding of the biological activities of heparin requires structurally defined heparin oligosaccharides. The chemoenzymatic synthesis of heparin oligosaccharides relies on glycosyltransferases that use UDP-sugar nucleotides as donors. Uridine 5'-diphosphoiduronic acid (UDP-IdoA) and uridine 5'-diphosphohexenuronic acid (UDP-HexUA) have been synthesized as potential analogues of uridine 5'-diphosphoglucuronic acid (UDP-GlcA) for enzymatic incorporation into heparin oligosaccharides. Non-natural UDP-IdoA and UDP-HexUA were tested as substrates for various glucuronosyltransferases to better understand enzyme specificity.
Collapse
Affiliation(s)
- Michel Weïwer
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180
| | - Trevor Sherwood
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180
| | - Dixy E. Green
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., Oklahoma City, Oklahoma
| | - Miao Chen
- University of North Carolina School of Pharmacy, Division of Medicinal Chemistry and Natural Products, CB no. 7360 Beard Hall, Room 309, Chapel Hill, North Carolina 27599-7360
| | - Paul L. DeAngelis
- Department of Biochemistry and Molecular Biology, University of Oklahoma Health Sciences Center, 940 Stanton L. Young Blvd., Oklahoma City, Oklahoma
| | - Jian Liu
- University of North Carolina School of Pharmacy, Division of Medicinal Chemistry and Natural Products, CB no. 7360 Beard Hall, Room 309, Chapel Hill, North Carolina 27599-7360
| | - Robert J. Linhardt
- Department of Chemistry and Chemical Biology, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180
- Department of Chemical and Biological Engineering and Department of Biology, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180
| |
Collapse
|
70
|
|
71
|
Leonelli F, Capuzzi M, Bodo E, Passacantilli P, Piancatelli G. Synthesis of new 2-phosphono-α-d-glycoside derivatives by stereoselective oxa-Michael addition to a d-galacto derived enone. Carbohydr Res 2008; 343:1133-41. [DOI: 10.1016/j.carres.2008.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2008] [Revised: 02/28/2008] [Accepted: 03/06/2008] [Indexed: 10/22/2022]
|
72
|
Synthesis and anticancer activity studies of cyclopamine derivatives. Bioorg Med Chem Lett 2008; 18:1359-63. [DOI: 10.1016/j.bmcl.2008.01.017] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2007] [Revised: 12/28/2007] [Accepted: 01/03/2008] [Indexed: 11/17/2022]
|
73
|
Cameron NR, Spain SG, Kingham JA, Weck S, Albertin L, Barker CA, Battaglia G, Smart T, Blanazs A. Synthesis of well-defined glycopolymers and some studies of their aqueous solution behaviour. Faraday Discuss 2008; 139:359-68; discussion 399-417, 419-20. [DOI: 10.1039/b717177c] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
74
|
A Facile Synthesis of C-terminal Neoglycopeptides: Incorporation of Urea Moiety between Sugars and Peptides Employing Curtius Rearrangement. Int J Pept Res Ther 2007. [DOI: 10.1007/s10989-007-9101-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
75
|
|
76
|
Santoyo-González F, Hernández-Mateo F. Azide–Alkyne 1,3-Dipolar Cycloadditions: a Valuable Tool in Carbohydrate Chemistry. HETEROCYCLES FROM CARBOHYDRATE PRECURSORS 2007. [DOI: 10.1007/7081_2007_050] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|