1
|
Wang S, Chen C, Gadi MR, Saikam V, Liu D, Zhu H, Bollag R, Liu K, Chen X, Wang F, Wang PG, Ling P, Guan W, Li L. Chemoenzymatic modular assembly of O-GalNAc glycans for functional glycomics. Nat Commun 2021; 12:3573. [PMID: 34117223 PMCID: PMC8196059 DOI: 10.1038/s41467-021-23428-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 04/29/2021] [Indexed: 01/16/2023] Open
Abstract
O-GalNAc glycans (or mucin O-glycans) play pivotal roles in diverse biological and pathological processes, including tumor growth and progression. Structurally defined O-GalNAc glycans are essential for functional studies but synthetic challenges and their inherent structural diversity and complexity have limited access to these compounds. Herein, we report an efficient and robust chemoenzymatic modular assembly (CEMA) strategy to construct structurally diverse O-GalNAc glycans. The key to this strategy is the convergent assembly of O-GalNAc cores 1-4 and 6 from three chemical building blocks, followed by enzymatic diversification of the cores by 13 well-tailored enzyme modules. A total of 83 O-GalNAc glycans presenting various natural glycan epitopes are obtained and used to generate a unique synthetic mucin O-glycan microarray. Binding specificities of glycan-binding proteins (GBPs) including plant lectins and selected anti-glycan antibodies towards these O-GalNAc glycans are revealed by this microarray, promoting their applicability in functional O-glycomics. Serum samples from colorectal cancer patients and healthy controls are assayed using the array reveal higher bindings towards less common cores 3, 4, and 6 than abundant cores 1 and 2, providing insights into O-GalNAc glycan structure-activity relationships.
Collapse
Affiliation(s)
- Shuaishuai Wang
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| | - Congcong Chen
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA ,grid.27255.370000 0004 1761 1174National Glycoengineering Research Center, Shandong Provincial Key Laboratory of Glycochemistry and Glycobiology, Shandong University, Qingdao, 266237 Shandong China ,grid.495839.aShandong Academy of Pharmaceutical Science, Key Laboratory of Biopharmaceuticals, Engineering Laboratory of Polysaccharide Drugs, National-Local Joint Engineering Laboratory of Polysaccharide Drugs, Jinan, 250101 Shandong China
| | - Madhusudhan Reddy Gadi
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| | - Varma Saikam
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| | - Ding Liu
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| | - He Zhu
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| | - Roni Bollag
- grid.410427.40000 0001 2284 9329Georgia Cancer Center, Augusta University, Augusta, GA 30912 USA
| | - Kebin Liu
- grid.410427.40000 0001 2284 9329Department of Biochemistry and Molecular Biology, Medical College of Georgia, Augusta, GA 30912 USA
| | - Xi Chen
- grid.27860.3b0000 0004 1936 9684Department of Chemistry, University of California, Davis, CA 95616 USA
| | - Fengshan Wang
- grid.27255.370000 0004 1761 1174Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Science, Shandong University, Jinan, 250012 Shandong China
| | - Peng George Wang
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA ,grid.263817.9Present Address: School of Medicine, Southern University of Science and Technology, Shenzhen, 518055 Guangdong China
| | - Peixue Ling
- grid.27255.370000 0004 1761 1174National Glycoengineering Research Center, Shandong Provincial Key Laboratory of Glycochemistry and Glycobiology, Shandong University, Qingdao, 266237 Shandong China ,grid.495839.aShandong Academy of Pharmaceutical Science, Key Laboratory of Biopharmaceuticals, Engineering Laboratory of Polysaccharide Drugs, National-Local Joint Engineering Laboratory of Polysaccharide Drugs, Jinan, 250101 Shandong China ,grid.27255.370000 0004 1761 1174Key Laboratory of Chemical Biology (Ministry of Education), Institute of Biochemical and Biotechnological Drug, School of Pharmaceutical Science, Shandong University, Jinan, 250012 Shandong China
| | - Wanyi Guan
- grid.256884.50000 0004 0605 1239College of Life Science, Hebei Normal University, Shijiazhuang, 050024 Hebei China
| | - Lei Li
- grid.256304.60000 0004 1936 7400Department of Chemistry, Georgia State University, Atlanta, GA 30303 USA
| |
Collapse
|
2
|
Labrada KP, Strobl S, Eckmair B, Blaukopf M, Dutkiewicz Z, Hykollari A, Malzl D, Paschinger K, Yan S, Wilson IBH, Kosma P. Zwitterionic Phosphodiester-Substituted Neoglycoconjugates as Ligands for Antibodies and Acute Phase Proteins. ACS Chem Biol 2020; 15:369-377. [PMID: 31935056 PMCID: PMC7046318 DOI: 10.1021/acschembio.9b00794] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Zwitterionic modifications of glycans, such as phosphorylcholine and phosphoethanolamine, are known from a range of prokaryotic and eukaryotic species and are recognized by mammalian antibodies and pentraxins; however, defined saccharide ligands modified with these zwitterionic moieties for high-throughput studies are lacking. In this study, we prepared and tested example mono- and disaccharides 6-substituted with either phosphorylcholine or phosphoethanolamine as bovine serum albumin neoglycoconjugates or printed in a microarray format for subsequent assessment of their binding to lectins, pentraxins, and antibodies. C-Reactive protein and anti-phosphorylcholine antibodies bound specifically to ligands with phosphorylcholine, but recognition by concanavalin A was abolished or decreased as compared with that to the corresponding nonzwitterionic compounds. Furthermore, in array format, the phosphorylcholine-modified ligands were recognized by IgG and IgM in sera of either non-infected or nematode-infected dogs and pigs. Thereby, these new compounds are defined ligands which allow the assessment of glycan-bound phosphorylcholine as a target of both the innate and adaptive immune systems in mammals.
Collapse
Affiliation(s)
- Karell Pérez Labrada
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Sebastian Strobl
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Barbara Eckmair
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Markus Blaukopf
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Zuzanna Dutkiewicz
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Alba Hykollari
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Daniel Malzl
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Katharina Paschinger
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | | | - Iain B. H. Wilson
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| | - Paul Kosma
- Department of Chemistry, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria
| |
Collapse
|
3
|
Paramasivam S, Fairbanks AJ. Rapid synthesis of N-glycan oxazolines from locust bean gum via the Lafont rearrangement. Carbohydr Res 2019; 477:11-19. [DOI: 10.1016/j.carres.2019.03.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 03/20/2019] [Indexed: 12/16/2022]
|
4
|
Xolin A, Norsikian S, Boyer FD, Beau JM. Iron(III)-Triflate-Catalyzed Multiple Glycosylations with Peracetylated β-d-Glucosamine. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600457] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Amandine Xolin
- Institut de Chimie des Substances Naturelles; CNRS UPR2301; Univ. Paris-Sud; Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Stéphanie Norsikian
- Institut de Chimie des Substances Naturelles; CNRS UPR2301; Univ. Paris-Sud; Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
| | - François-Didier Boyer
- Institut de Chimie des Substances Naturelles; CNRS UPR2301; Univ. Paris-Sud; Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
- Institut Jean-Pierre Bourgin; INRA; AgroParisTech; CNRS; Université Paris-Saclay; RD10 78026 Versailles France
| | - Jean-Marie Beau
- Institut de Chimie des Substances Naturelles; CNRS UPR2301; Univ. Paris-Sud; Université Paris-Saclay; 1 av. de la Terrasse 91198 Gif-sur-Yvette France
- Laboratoire de Synthèse de Biomolécules; Institut de Chimie Moléculaire et des Matériaux d'Orsay; Univ. Paris-Sud; Université Paris-Saclay; 91405 Orsay France
| |
Collapse
|
5
|
Aly MRES, El Ashry ESH. Recent Advances Toward Robust N-Protecting Groups for Glucosamine as Required for Glycosylation Strategies. Adv Carbohydr Chem Biochem 2016; 73:117-224. [PMID: 27816106 DOI: 10.1016/bs.accb.2016.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
2-Amino-2-deoxy-d-glucose (d-glucosamine) is among the most abundant monosaccharides found in natural products. This constituent, recognized for its ubiquity, is presented in most instances as its N-acetyl derivative 2-acetamido-2-deoxy-d-glucopyranose (N-acetylglucosamine, GlcNAc, NAG). It occurs as the β-linked pyranosyl group in polysaccharides and oligosaccharides, and sometimes as the monosaccharide itself, either in its native state or as a glycoconjugate. The compound's acylation profile and other aspects of its structure are important elements in determining the variety of reactivities and functions of the molecule as a whole. Methods elaborated to investigate these challenges have been intensively reviewed; however, a relatively more comprehensive reviewing of this subject is introduced here to cover some aspects that have not been sufficiently covered. This might enable those who are beginners in this field to be aware of the subject in a more comprehensive context. 2-Amino-2-deoxy-d-glucosylation strategies demand robust amino-protecting groups that survive under a variety of chemical conditions, yet provide groups that can be deprotected under relatively mild conditions. At the end of this review, a table that includes all the N-protecting groups that have been used for glucosamine is provided to introduce them at a glance to aid in constructing building blocks that will act as useful 2-amino-2-deoxy-d-glucosyl donors.
Collapse
Affiliation(s)
- Mohamed Ramadan El Sayed Aly
- Faculty of Science, Taif University, Taif, Kingdom of Saudi Arabia; Faculty of Science, Port Said University, Port Said, Egypt
| | - El Sayed H El Ashry
- Faculty of Science, Alexandria University, Alexandria, Egypt; Universität Konstanz, Konstanz, Germany
| |
Collapse
|
6
|
Baum D, Kosma P, Zamyatina A. Synthesis of zwitterionic 1,1'-glycosylphosphodiester: a partial structure of galactosamine-modified Francisella lipid A. Org Lett 2014; 16:3772-5. [PMID: 25003818 PMCID: PMC4106266 DOI: 10.1021/ol501639c] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Indexed: 02/08/2023]
Abstract
Synthesis of a "double glycosidic" phosphodiester comprising anomeric centers of two 2-amino-2-deoxy-sugars is reported. The carbohydrate epitope of Francisella lipid A modified with α-d-galactosamine at the anomerically linked phosphate has been stereoselectively prepared and coupled to maleimide-activated bovine serum albumin via an amide-linked thiol-terminated spacer group. H-Phosphonate and phosphoramidite approaches have been explored for the coupling of 4,6-DTBS-2-azido-protected GalN lactol and peracetylated spacer-equipped reducing βGlcN(1→6)GlcN disaccharide via phosphodiester linkage. Deprotection conditions preserving the integrity of the labile glycosidic zwitterionic phosphodiester were elaborated.
Collapse
Affiliation(s)
- David Baum
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
| | - Paul Kosma
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
| | - Alla Zamyatina
- Department
of Chemistry, University of Natural Resources
and Life Sciences, Muthgasse
18, A-1190 Vienna, Austria
| |
Collapse
|
7
|
Wang S, Lafont D, Rahkila J, Picod B, Leino R, Vidal S. Glycosylation of ‘basic’ alcohols: methyl 6-(hydroxymethyl)picolinate as a case study. Carbohydr Res 2013; 372:35-46. [DOI: 10.1016/j.carres.2013.02.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Revised: 02/14/2013] [Accepted: 02/15/2013] [Indexed: 11/28/2022]
|
8
|
Graham ME, Stone RS, Robinson PJ, Payne RJ. Synthesis and protein binding studies of a peptide fragment of clathrin assembly protein AP180 bearing an O-linked β-N-acetylglucosaminyl-6-phosphate modification. Org Biomol Chem 2012; 10:2545-51. [DOI: 10.1039/c2ob07139h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
9
|
Koizumi A, Yamano K, Schweizer F, Takeda T, Kiuchi F, Hada N. Synthesis of the carbohydrate moiety from the parasite Echinococcus multilocularis and their antigenicity against human sera. Eur J Med Chem 2011; 46:1768-78. [DOI: 10.1016/j.ejmech.2011.02.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 02/10/2011] [Accepted: 02/14/2011] [Indexed: 10/18/2022]
|
10
|
Unverzagt C, Gundel G, Eller S, Schuberth R, Seifert J, Weiss H, Niemietz M, Pischl M, Raps C. Synthesis of multiantennary complex type N-glycans by use of modular building blocks. Chemistry 2010; 15:12292-302. [PMID: 19806620 DOI: 10.1002/chem.200901908] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
A modular set of oligosaccharide building blocks was developed for the synthesis of multiantennary N-glycans of the complex type, which are commonly found on glycoproteins. The donor building blocks were laid out for the elongation of a core trisaccharide acceptor (beta-mannosyl chitobiose) conveniently protected with a single benzylidene moiety at the beta-mannoside. Through two consecutive regio- and stereoselective couplings the donors gave N-glycans with three to five antennae in high yields. Due to the consistent protection group pattern of the donors the deprotection of the final products can be performed by using a general reaction sequence.
Collapse
Affiliation(s)
- Carlo Unverzagt
- Bioorganische Chemie, Universität Bayreuth, Gebäude NW1, 95440 Bayreuth, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Kurosu M, Li K. MILD AND SELECTIVE O-GLYCOSYLATIONS OF PRIMARY ALCOHOLS WITH THE THIOGLUCOSAMINIDE DERIVATIVE PROMOTED BY N-IODOSUCCINIMIDE AND HBF(4)-ADOSROBED ON SILICA GEL. HETEROCYCLES 2010; 80:115-123. [PMID: 23239901 PMCID: PMC3518929 DOI: 10.3987/com-09-s(s)24] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Selective glycosylations of primary alcohols with the thioglucosaminide 1 are achieved by using NIS and HBF(4)-SiO(2). HBF(4)-SiO(2) is a mild Brønsted acid which requires primary alcohols or phenols to effectively activate 1 with NIS at rt. A wide range of functional groups are tolerated under these conditions.
Collapse
Affiliation(s)
- Michio Kurosu
- Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 1682 Campus Delivery, Fort Collins, CO 80523-1682, USA
| | - Kai Li
- Department of Microbiology, Immunology, and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, 1682 Campus Delivery, Fort Collins, CO 80523-1682, USA
| |
Collapse
|
12
|
Karskela M, Virta P, Malinen M, Urtti A, Lönnberg H. Synthesis and cellular uptake of fluorescently labeled multivalent hyaluronan disaccharide conjugates of oligonucleotide phosphorothioates. Bioconjug Chem 2009; 19:2549-58. [PMID: 19053300 DOI: 10.1021/bc800260y] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Clustered hyaluronan disaccharides were studied as mediators of cellular delivery of antisense oligonucleotides through receptor-mediated endocytosis. For this purpose, a synthetic route for preparation of an appropriately protected hyaluronic acid dimer bearing an aldehyde tether (1) was devised. Up to three non-nucleosidic phosphoramidite building blocks (2), each bearing two phthaloyl protected aminooxy groups, were then inserted into the 3'-terminus of the desired phosphorothioate oligodeoxyribonucleotide, and 6-FAM phosphoramidite was introduced into the 5'-terminus. After completion of the chain assembly, the aldehyde-tethered sugar ligands were attached to the deprotected aminooxy functions by on-support oximation. Three fluorescein-labeled phosphorothioate oligonucleotide glycoconjugates (28-30) containing two, four, or six hyaluronan disaccharides were prepared. The influence of the hyaluronan moieties on the cellular uptake of the thioated oligonucleotides was tested in a cell line expressing the hyaluronan receptor CD44. Specific uptake was not detected with this combination of multiple hyaluronan disaccharides.
Collapse
Affiliation(s)
- Marika Karskela
- Department of Chemistry, University of Turku, FI-20014 Turku, Finland.
| | | | | | | | | |
Collapse
|
13
|
Pyruvated saccharides — Novel strategies for oligosaccharide synthesis. Top Curr Chem (Cham) 2008. [DOI: 10.1007/bfb0119224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
14
|
Unverzagt C, Eller S, Mezzato S, Schuberth R. A Double Regio- and Stereoselective Glycosylation Strategy for the Synthesis of N-Glycans. Chemistry 2008; 14:1304-11. [DOI: 10.1002/chem.200701251] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
15
|
Rising TWDF, Claridge TDW, Davies N, Gamblin DP, Moir JWB, Fairbanks AJ. Synthesis of N-glycan oxazolines: donors for endohexosaminidase catalysed glycosylation. Carbohydr Res 2006; 341:1574-96. [PMID: 16584712 DOI: 10.1016/j.carres.2006.03.007] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2006] [Revised: 02/24/2006] [Accepted: 03/07/2006] [Indexed: 11/20/2022]
Abstract
Oxazoline mono-, di-, tri- and hexasaccharides, corresponding to the core components of N-linked glycoprotein high mannose glycans, are synthesised as potential glycosyl donors for endohexosaminidase catalysed glycosylation of glycopeptides and glycoprotein remodelling. The crucial beta-D-Manp-(1-->4)-D-GlcpNAc linkage is synthesised via epimerisation of gluco disaccharide substrates by sequential triflation and nucleophilic substitution. Oxazolines are formed directly from the anomeric OPMP protected N-acetyl glucosamine derivatives. Efficient endohexosaminidase catalysed glycosylation of a synthetic beta-D-GlcpNAcAsn glycosyl amino acid is demonstrated with the trisaccharide oxazoline donor.
Collapse
Affiliation(s)
- Thomas W D F Rising
- Chemistry Research Laboratory, Oxford University, Mansfield Road, Oxford OX1 3TA, UK
| | | | | | | | | | | |
Collapse
|
16
|
Blattner R, Furneaux RH, Ludewig M. Syntheses of oligomannosides in solution and on a soluble polymer support: a comparison. Carbohydr Res 2006; 341:299-321. [PMID: 16364272 DOI: 10.1016/j.carres.2005.11.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Accepted: 11/28/2005] [Indexed: 11/26/2022]
Abstract
The alpha-(1-->6)-linked and the alpha-(1-->2)-linked linear mannotetraose glycosides and, respectively, and the branched mannopentaoside [R=CH2(CH2)2CH2Cl] were synthesised by conventional methods in solution, using trichloroacetimidate donors, and the products were obtained in 39%, 42% and 40% overall yield, respectively. For comparative purposes, the same two linear tetrasaccharides were prepared by use of MPEG as a soluble polymer support, the yields being 34% and 14%, respectively. An attempted MPEG-supported synthesis of the branched pentasaccharide was unsuccessful. The merits and shortcomings of oligosaccharide syntheses on MPEG are discussed.
Collapse
Affiliation(s)
- Regine Blattner
- Industrial Research Limited, PO Box 31 310, Lower Hutt, New Zealand
| | | | | |
Collapse
|
17
|
Efficient synthesis of core 2 class glycosyl amino acids by one-pot glycosylation approach. Tetrahedron Lett 2004. [DOI: 10.1016/j.tetlet.2003.12.042] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
18
|
Hirooka M, Yoshimura A, Saito I, Ikawa F, Uemoto Y, Koto S, Takabatake A, Taniguchi A, Shinoda Y, Morinaga A. Glycosylation Using Hemiacetal Sugar Derivatives: Synthesis ofO-α-D-Rhamnosyl-(1→3)-O-α-D-rhamnosyl-(1→2)-d-rhamnose andO-α-D-Tyvelosyl-(1→3)-O-α-D-mannosyl-(1→4)-L-rhamnose. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2003. [DOI: 10.1246/bcsj.76.1409] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
19
|
Heng L, Ning J, Kong F. Facile synthesis of a comb-like mannohexaose: a trimer of the disaccharide repeating unit of the cell-wall mannans of Aphanoascus mephitatus and related species. Carbohydr Res 2001; 331:431-7. [PMID: 11398985 DOI: 10.1016/s0008-6215(01)00059-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
An efficient method for the preparation of a comb-like mannohexaose having alpha-(1-->6) and alpha-(1-->2) linkages has been described using 6-O-acetyl-2-O-benzoyl-3,4-di-O-benzyl-alpha-D-mannopyranosyl trichloroacetimidate as the key glycosyl donor in an 'inverse Schmidt' procedure.
Collapse
Affiliation(s)
- L Heng
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, People's Republic of China
| | | | | |
Collapse
|
20
|
Nicolaou KC, Fylaktakidou KC, Mitchell HJ, van Delft FL, Rodríguez RM, Conley SR, Jin Z. Total synthesis of everninomicin 13,384-1--Part 4: explorations of methodology; stereocontrolled synthesis of 1,1'-disaccharides, 1,2-seleno migrations in carbohydrates, and solution- and solid-phase synthesis of 2-deoxy glycosides and orthoesters. Chemistry 2000; 6:3166-85. [PMID: 11002995 DOI: 10.1002/1521-3765(20000901)6:17<3166::aid-chem3166>3.0.co;2-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Methods for the stereocontrolled construction of 1,1'-disaccharides, 2-deoxy glycosides, and orthoesters are reported. Specifically, a tin-acetal moiety was utilized to fix the anomeric stereochemistry of a carbohydrate acceptor leading to an efficient and stereoselective synthesis of 1,1'-disaccharides, while a newly discovered 1,2-phenylseleno migration reaction in carbohydrates opened entries to 2-deoxy glycosides and orthoesters. Thus, reaction of 2-hydroxy phenylselenoglycosides with DAST led to 2-phenylselenoglycosyl fluorides which reacted with carbohydrate acceptors to afford, stereoselectively, 2-phenylselenoglycosides. The latter compounds could be reductively deselenated to 2-deoxy glycosides or oxidatively converted to orthoesters via the corresponding ketene acetals.
Collapse
Affiliation(s)
- K C Nicolaou
- Department of Chemistry and The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, California 92037, USA.
| | | | | | | | | | | | | |
Collapse
|
21
|
Figueroa-Pérez S, Verez-Bencomo V. Synthesis of dimeric Lewis X antigenic determinant with azido-type spacer arm by a sequence of regioselective glycosylation steps. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)02104-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
22
|
E. Aly MR, Castro-Palomino JC, I. Ibrahim ES, El-Ashry ESH, Schmidt RR. The Dimethylmaleoyl Group as Amino Protective Group – Application to the Synthesis of Glucosamine-Containing Oligosaccharides. European J Org Chem 1998. [DOI: 10.1002/(sici)1099-0690(199811)1998:11<2305::aid-ejoc2305>3.0.co;2-w] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
23
|
Lay L, Manzoni L, Schmidt RR. Synthesis of N-acetylglucosamine containing Lewis A and Lewis X building blocks based on N-tetrachlorophthaloyl protection--synthesis of Lewis X pentasaccharide. Carbohydr Res 1998; 310:157-71. [PMID: 9809410 DOI: 10.1016/s0008-6215(98)00148-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Phenyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-1-thio-beta-D- glucopyranoside (5a) and thexyldimethylsilyl 6-O-benzyl-2-deoxy-2-tetrachlorophthalimido-beta-D- glucopyranoside (5b) gave with O-(2,3,4,6-tetra-O-acetyl-alpha-D-galactopyranosyl)trichloroacetimida te (8) in the presence of BF3.Et2O as catalyst exclusively lactosamine derivatives 7a and 7b, respectively, in high yields. Ensuing reaction with O-(3, 4-di-O-acetyl-2-O-benzyl-alpha-L-fucopyranosyl) trichloroacetimidate (9) in the presence of TMSOTf as catalyst afforded Le(x) trisaccharide intermediates 10a,b. With fucosyl donor 9 and 5a,b as acceptors in the presence of TMSOTf as catalyst glycosylation either at the 3-O or the 4-O was observed, thus leading to mixtures of disaccharides 11a/12a and 11b/12b, respectively; their reaction with 8 furnished Le(x) trisaccharide intermediates 10a,b and Le(a) trisaccharide intermediates 14a,b. Transformation of 10b into the corresponding trichloroacetimidate 17 and reaction with lactose acceptor 19 in the presence of Zn(OTf)2 as catalyst gave protected Le(x) pentasaccahride intermediate 21, which on deprotection led to unprotected Le(x) pentasaccharide 1.
Collapse
Affiliation(s)
- L Lay
- Fakultät Chemie, Universität Konstanz, Germany
| | | | | |
Collapse
|
24
|
Weiler S, Schmidt RR. A versatile strategy for the synthesis of complex type N-Glycans: Synthesis of diantennary and bisected diantennary oligosaccharides. Tetrahedron Lett 1998. [DOI: 10.1016/s0040-4039(98)00246-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
25
|
Abstract
A partial structure of many glycoproteins, a glycosylated asparagine carrying a complex type undecasaccharide N-glycan (Neu5Ac(alpha 2-6)Gal(beta 1-4)GlcNAc(beta 1-2)Man alpha 1-3) [Neu5Ac(alpha 2-6)Gal(beta 1-4)GlcNAc(beta 1-2)Man(alpha 1-6)]Man(beta 1-4) GlcNAc(beta 1-4)GlcNAc-Asn) was obtained by total synthesis. As a starting material served a chemically synthesized diantennary heptasaccharide azide which was deprotected in a three-step sequence in high yield. The reduction of the anomeric azide was accomplished with propanedithiol in methanol-ethyldiisopropylamine. Coupling of the glycosyl amine to an activated aspartic acid gave the benzyl protected asparagine conjugate. After removal of the six benzyl functions the resulting free heptasaccharide asparagine was elongated enzymatically in the oligosaccharide part. The use of beta-1,4-galactosyltransferase and alpha-2,6-sialytransferase in the presence of alkaline phosphatase allowed the efficient transfer of four sugar units to the acceptor resulting in a full length N-glycan, a sialyated diantennary undecasaccharide-asparagine of the complex type.
Collapse
Affiliation(s)
- C Unverzagt
- Institut für Organische Chemie und Biochemie, TU München, Garching, Germany
| |
Collapse
|
26
|
Castro-Palomino JC, Ritter G, Fortunato SR, Reinhardt S, Old LJ, Schmidt RR. Eine effiziente Synthese von Gangliosid GM2 für die Verwendung in Tumorimpfstoffen. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091820] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
27
|
Schleyer A, Meldal M, Renil M, Paulsen H, Bock K. Direkte Festphasen-Glycosylierung von Peptiden an einem neuartigen Polyethylenglycol-Harz. Angew Chem Int Ed Engl 1997. [DOI: 10.1002/ange.19971091814] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
28
|
|
29
|
Lindhorst TK. An Unusual Side Reaction in the Rearrangement of 3,4,6-Tri-O-Acetyl-1,2-O-(Allyloxyethylidene)-β-D-Mannopyranose with TMS-Triflate: Formation of an α(1→2)-Linked Disaccharide. J Carbohydr Chem 1997. [DOI: 10.1080/07328309708006524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
30
|
Dullenkopf W, Castro-Palomino JC, Manzoni L, Schmidt RR. N-trichloroethoxycarbonyl-glucosamine derivatives as glycosyl donors. Carbohydr Res 1996; 296:135-47. [PMID: 9008845 DOI: 10.1016/s0008-6215(96)00237-6] [Citation(s) in RCA: 133] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
D-Glucosamine can be readily transformed into 1,3,4,6-tetra-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino+ ++) -D-glucopyranose (2). From this intermediate valuable glycosyl donors can be obtained; reaction with ethanethiol in the presence of boron trifluoride etherate afforded ethyl 3,4,6-tri-O-acetyl-2-deoxy-1-thio-2-(2,2, 2-trichloroethoxycarbonylamino)-beta-D-glucopyranoside (4) which gave, upon N-acetylation, the N-acetyl-N-trichloroethoxycarbonyl derivative (5). Selective removal of the 1-O-acetyl group in 2 followed by treatment with trichloroacetonitrile in the presence of base afforded 3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)- alpha -D-glucopyranosyl trichloroacetimidate (6). Reaction of 5 with five selectively protected glycosides as glycosyl acceptors in the presence of N-iodosuccinimide/trifluoromethanesulfonic acid as the promoter system furnished the corresponding beta-glycosides in good yields, thus exhibiting the valuable glycosyl donor properties of 5. Reductive removal of the trichloroethoxycarbonyl (Teoc) group afforded the corresponding N-acetyl-protected saccharides in high yields. The imidate 6 reacted with three of the above acceptors in the presence of catalytic amounts of trimethylsilyl trifluoromethanesulfonate to give the beta-linked disaccharides in even better yields. The direct replacement of the N-Teoc group by the N-acetyl group using zinc/acetic anhydride, via the free amines as transient intermediates, adds to the high efficiency and convenience of this methodology.
Collapse
Affiliation(s)
- W Dullenkopf
- Fakultät für Chemie, Universität Konstanz, Germany
| | | | | | | |
Collapse
|
31
|
Unverzagt C. Chemoenzymatische Synthese eines sialylierten Undecasaccharid-Asparagins. Angew Chem Int Ed Engl 1996. [DOI: 10.1002/ange.19961082012] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
32
|
Schüle G, Ziegler T. Efficient convergent block synthesis of a pyruvated tetrasaccharide 5-aminopentyl glycoside related to Streptococcus pneumoniae type 27. Tetrahedron 1996. [DOI: 10.1016/0040-4020(95)01093-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
33
|
Abstract
N-Troc-protected (Troc = 2,2,2-trichloroethoxycarbonyl) glucosamine and galactosamine glycosyl donors (1-O-acetyl sugar, bromo sugar, and thioglycoside) were compared with the corresponding N-Phth-protected derivatives in glycosylations of 2-(trimethylsilyl)ethanol, 2-bromoethanol, methyl 3-mercaptopropionate, N-Fmoc-protected serine, and 2-(trimethylsilyl)ethyl 6-O-benzyl-2-deoxy-2-phthalimido-beta-D-glucopyranoside. The N-Troc-protected donors gave pure beta-glycosides in somewhat higher yields than the N-Phth-protected counterparts. The N-Troc protecting group can be removed by reduction with zinc, which allows selective N-deprotection in oligosaccharides containing both N-Troc and N-Phth groups.
Collapse
Affiliation(s)
- U Ellervik
- Chemical Center, Lund Institute of Technology, University of Lund, Sweden
| | | |
Collapse
|
34
|
Efficient synthesis of O-(2-acetamido-2-deoxy-β-d-glucopyranosyl)-ser/thr building blocks for spps of o-glcnac glycopeptides. Tetrahedron Lett 1995. [DOI: 10.1016/0040-4039(95)01941-a] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Paulsen H, Springer M, Reck F, Brockhausen I, Schachter H. [Synthesis of modified tetrasaccharides as analog acceptor-inhibitors of N-acetylglucosaminyltransferase II]. Carbohydr Res 1995; 275:403-11. [PMID: 8529232 DOI: 10.1016/0008-6215(95)00056-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- H Paulsen
- Institut für Organische Chemie der Universität Hamburg, Deutschland
| | | | | | | | | |
Collapse
|
36
|
Ziegler T. Synthesis of the 5-aminopentyl glycoside of beta-D-Gal p-(1-->4)-beta-D-Glc p NAc-(1-->3)-L-Fuc p and fragments thereof related to glycopeptides of human Christmas factor and the marine sponge Microciona prolifera. Carbohydr Res 1994; 262:195-212. [PMID: 7982215 DOI: 10.1016/0008-6215(94)84179-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The marine sponge Microciona prolifera and human coagulation factor IX (Christmas factor)-related mono- to tri-saccharide 5-aminopentyl glycosides beta-D-Gal p-R (5), beta-D-Glc pNAc-R (16), beta-D-Gal p-(1-->4)-beta-D-Glc p NAc-R (26), beta-D-Glc p NAc-(1-->3)-beta-L-Fuc p-R (39), beta-D-Glc pNAc-(1-->3)-alpha-L-Fuc p-R (43), beta-D-Gal p-(1-->4)-beta-D- Glc pNAc-(1-->3)-beta-L-Fuc p-R (45), and beta-D-Gal p-(1-->4)-beta-D-Glc p NAc-(1-->3)-alpha-L-Fuc p-R (47), where R is a 5-aminopentyloxy spacer moiety, which allowed the construction of glycoconjugates, were prepared. Thus, 3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2- trichloroethoxycarbonyl-amino)-alpha-D-glucopyranosyl trichloroacetimidate (10) and 1,3,4,6-tetra-O-acetyl-2-chloro-acetamido-2- deoxy-beta-D-glucopyranose (13) were condensed with N-Z-protected 5-amino-pentanol (2) followed by conversion of the coupling products into the corresponding N-acetylglucosamine derivatives, to give compound 16 after deblocking. Similarly, the donors 10 and 13 were coupled to position 3 of suitably protected aminopentyl beta- (32) and alpha- (37) -L-fucopyranosides, to give the disaccharides 39 and 43, respectively. Starting from lactose, O-(2,3,4,6-tetra-O-benzoyl-beta-D-galactopyranosyl)-(1-->4)-3,6-di-O- benzoyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-alpha-D-glu copyranosyl trichloroacetimidate (23) was prepared and used as an efficient disaccharide donor for the construction of ligand 26 from 2 and of the trisaccharide ligands 45 and 47 from fucosides 32 and 37, respectively.
Collapse
Affiliation(s)
- T Ziegler
- Institut für Organische Chemie und Isotopenforschung, Universität Stuttgart, Germany
| |
Collapse
|
37
|
Ziegler T, Herold G. Preparation of Diastereomeric 3,4-O-Pyruvate Acetal-ContainingD-Galactopyranose Derivatives, Structural Assignment and Use for Oligosaccharide Synthesis. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/jlac.199419940903] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
38
|
Unverzagt C. Synthesis of a Biantennary Heptasaccharide by Regioselective Glycosylations. ACTA ACUST UNITED AC 1994. [DOI: 10.1002/anie.199411021] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
39
|
Unverzagt C. Synthese eines verzweigten Heptasaccharids durch regioselektive Glycosylierungen. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061024] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
40
|
Goddat J, Grey AA, Hricovíni M, Grushcow J, Carver JP, Shah RN. Synthesis of di- and tri-saccharides with intramolecular NH-glycosidic linkages: molecules with flexible and rigid glycosidic bonds for conformational studies. Carbohydr Res 1994; 252:159-70. [PMID: 8137358 DOI: 10.1016/0008-6215(94)90013-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Attempted dephthalimidation of the trisaccharide 1-O-acetyl-3,4-di-O-benzyl- 2,6-di-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl )-alpha-D-mannopyranose (1) and its derivatives 2 and 3, as well as the disaccharide 1-O-acetyl-3,4,6-tri-O-benzyl-2-O-(3,4,6-tri-O-acetyl- 2-deoxy-2-phthalimido-beta-D-glucopyranosyl)-alpha-D-mannopyranose (13), with hydrazine hydrate in ethanol at 80 degrees C, produced the trisaccharide-6-O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-beta-D- glucopyranosyl)-3,4-di-O-benzyl-beta-D-mannopyranose-3',4',6'-tri-O-a cet yl- beta-D-glucopyranose 1,2'-N:1',2-O-dianhydride (4) and 3,4,6-tri-O-benzyl-beta-D-mannopyranose 3',4',6'-tri-O-acetyl-beta-D-glucopyranose 1,2'-N:1',2-O-dianhydride (14), respectively, containing an intramolecular NH-glycosidic linkage. The conventional deblocking of compounds 4 and 14 gave the completely deblocked trisaccharide 6-O-(2-acetamido-2-deoxy-beta-D-glucopyranosyl)-beta-D-mannopyranose beta-D-glucopyranose 1,2'-N:1',2-O-dianhydride (6) and the disaccharide beta-D-mannopyranose beta-D-glucopyranose 1,2'-N:1',2-O-dianhydride (16), respectively, containing an intact intramolecular NH-glycosidic bond. The unusual intra NH-glycosyl character makes the linkage rigid, and therefore these compounds should not only be useful for NMR studies but also as substrates or inhibitors of GlcNAc-transferases.
Collapse
Affiliation(s)
- J Goddat
- Department of Molecular and Medical Genetics, University of Toronto, Ontario, Canada
| | | | | | | | | | | |
Collapse
|
41
|
Affiliation(s)
- S Aoki
- Department of Chemistry, Scripps Research Institute, La Jolla, California 92037
| | | | | |
Collapse
|
42
|
Schmidt RR, Kinzy W. Anomeric-oxygen activation for glycoside synthesis: the trichloroacetimidate method. Adv Carbohydr Chem Biochem 1994; 50:21-123. [PMID: 7942254 DOI: 10.1016/s0065-2318(08)60150-x] [Citation(s) in RCA: 673] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- R R Schmidt
- Fakultät für Chemie, Universität Konstanz, Germany
| | | |
Collapse
|
43
|
Douglas SP, Whitfield DM, Krepinsky JJ. Silver Trifluoromethanesulfonate(Triflate) Activation of Trichloroacetimidates in Glycosylation Reactions. J Carbohydr Chem 1993. [DOI: 10.1080/07328309308018547] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
44
|
Paulsen H, Wilkens R, Reck F, Brockhausen I. Bausteine von Oligosacchariden, CIV. Synthese von verzweigten Tetrasaccharid- und Pentasaccharid-Strukturen vonN-Glycoproteinen, methyliert an 4′-OH des Verzweigungsgliedes. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/jlac.1992199201215] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
45
|
Paulsen H, Reck F, Brockhausen I. [Synthesis of modified oligosaccharides of the N-glycoprotein as substrate for N-acetylglucosaminyltransferase I]. Carbohydr Res 1992; 236:39-71. [PMID: 1291062 DOI: 10.1016/0008-6215(92)85006-l] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
In the synthesis of modified derivatives of octyl O-(alpha-D-mannopyranosyl)-(1-->3)-O-[(alpha-D-mannopyranosyl)-(1-->6)]- beta-D-mannopyranoside, 4.,5-epoxypentyl, a 4-diazirinopentyl, and a 5-(iodoacetamido)pentyl group were attached to the 3''-OH of the trisaccharide. The diazirino derivative may be especially suitable for photolabeling of the active site of N-acetylglucosaminyltransferase I (GlcNAcT-I). In addition, the 2'-OH group of the above-mentioned trisaccharide was reduced to a 2'-deoxy group and substituted 2'-O-methyl group.
Collapse
Affiliation(s)
- H Paulsen
- Institut für Organische Chemie, Universität Hamburg, Deutschland
| | | | | |
Collapse
|
46
|
Brockhausen I, Möller G, Yang JM, Khan SH, Matta KL, Paulsen H, Grey AA, Shah RN, Schachter H. Control of glycoprotein synthesis. Characterization of (1-->4)-N-acetyl-beta-D-glucosaminyltransferases acting on the alpha-D-(1-->3)- and alpha-D-(1-->6)-linked arms of N-linked oligosaccharides. Carbohydr Res 1992; 236:281-99. [PMID: 1291052 DOI: 10.1016/0008-6215(92)85022-r] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Hen oviduct membranes contain at least three N-acetyl-beta-D-glucosaminyltransferases (GlcNAc-T) that attach a beta GlcNAc residue in (1-4)-linkage to a D-Man p residue of the N-linked oligosaccharide core, i.e., (1-->4)-beta-D-GlcNAc-T III which adds a "bisecting" GlcNAc group to form the beta-D-GlcpNAc-(1-->4)-beta-D-Man p-(1-->4)-D-GlcNAc moiety; (1-->2)-beta-D-GlcNAc-T IV which adds a GlcNAc group to the (1-->3)-alpha-D-Man arm to form the beta-D-GlcpNAc-(1-->4)-[beta-D- GlcpNAc-(1-->2)]-alpha-D-Man p-(1-->3)-beta-D-Man p-(1-->4)-D-GlcpNAc component; and (1-->4)-beta-D-GlcNAc-T VI which adds a GlcNAc group to the alpha-D-Man p residue of beta-D-GlcpNAc-(1-->6)-[beta-D-GlcpNAc- (1-->2)]-alpha-D-Man p-R to form beta-D-GlcpNAc-(1-->6)-[beta-D-GlcpNAc-(1-->4)]-[beta-D-GlcpNAc- (1-->2)]-alpha-D-Man p-R. We now report a novel (1-->4)-beta-D-GlcNAc-T activity (GlcNAc-T VI') in hen oviduct membranes that transfers GlcNAc to beta-D-GlcpNAc-(1-->2)-alpha-D-Man p-(1-->6)-beta-D-Man p-R to form beta-D-GlcpNAc-(1-->4)-[beta-D-GlcpNAc-(1-->2)]-alpha-D-Man p-(1-->6)- beta-D-Man p-R. The structure of the enzyme product was confirmed by 1H NMR spectroscopy, FAB-mass spectrometry and methylation analysis. Previous work with GlcNAc-T IV was carried out with biantennary substrates; we now show that hen oviduct membrane GlcNAc-T IV can also transfer GlcNAc to monoantennary beta-D-GlcpNAc-(1-->2)-alpha-D-Manp-(1-->3)-beta-D-Man p-R to form beta-D-GlcpNAc-(1-->4)-[beta-D-GlcpNAc-(1-->2)]-alpha-D-Man p- (1-->3)-beta-D-Man p-R. The findings that GlcNAc-T VI' and IV have similar kinetic characteristics and that hen oviduct membranes can convert methyl beta-D-GlcpNAc-(1-->2)-alpha-D-Man p to methyl beta-D-GlcpNAc-(1-->4)-[beta-D-GlcpNAc-(1-->2)]-alpha-D-Man p suggest that these two activities may be due to the same enzyme. The R-group of the beta-D-GlcpNAc-(1-->2)-alpha-D-Man p-(1-->6)-beta-D-Man p (or Glcp)-R substrate has an important influence on GlcNAc-T VI' enzyme activity.(ABSTRACT TRUNCATED AT 400 WORDS)
Collapse
Affiliation(s)
- I Brockhausen
- Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Paulsen H, Meinjohanns E. Synthesis of modified oligosaccharides of N-Glycoproteins intended for substrate specificity studies of N-Acetylglucosaminyltransferases II-V. Tetrahedron Lett 1992. [DOI: 10.1016/s0040-4039(00)60178-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
48
|
Paulsen H, van Dorst JALM, Reck F, Meinjohanns E. Bausteine von Oligosacchariden, CI. Synthese von modifizierten Oligosacchariden derN-Glycoproteine zur Untersuchung der Substratspezifität derN-Acetylglucosaminyltransferase II des Trimming-Prozesses. ACTA ACUST UNITED AC 1992. [DOI: 10.1002/jlac.199219920189] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|