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Milton, M. J., Harris, R., Probert, M. A., Field, R. A. 
ORCID: https://orcid.org/0000-0001-8574-0275 and Homans, S. W.
(1998)
New conformational constraints in isotopically (13C) enriched oligosaccharides.
Glycobiology, 8 (2).
pp. 147-153.
ISSN 0959-6658
Abstract
Multidimensional heteronuclear NMR studies have been applied to the resonance assignment and conformational analysis of 13C-enriched Neu5Acα2-3Galβ1-4Glc. It is demonstrated that three-dimensional ROESY-HSQC experiments provide through-space distance restraints which cannot be observed with conventional homonuclear 1H techniques due to resonance overlap, In particular, connectivities demonstrating the existence of the 'anti' conformation about the Galβ1-4Glc glycosidic linkage are unambiguously observed. It is shown that 13C isotopic enrichment of the trisaccharide at a level > 95% enables straightforward measurement of trans-glycosidic 1H-13C and 13C-13C coupling constants and a Karplus-type relation is derived for the latter. In total 15 conformational restraints were obtained for the trisaccharide in aqueous solution, all of which were in excellent agreement with theoretical parameters computed from a 5 ns molecular dynamics simulation of the glycan.
| Item Type: | Article |
|---|---|
| Additional Information: | Funding Information: This work was supported by Wellcome Trust Grant Ref. 041973/Z/94/Z/JRS/RF to S.W.H. and 042472/Z/94/Z to R.A.F. We thank Dr. P. Lightfoot for performing the crystallographic analysis of 2,3-O-isopropylidene 1,6-anhydro-D-mannopyranose. |
| Uncontrolled Keywords: | conformational analysis,nmr,oligosaccharide,resonance,structure,biochemistry ,/dk/atira/pure/subjectarea/asjc/1300/1303 |
| Faculty \ School: | Faculty of Science > School of Chemistry, Pharmacy and Pharmacology |
| Related URLs: | |
| Depositing User: | LivePure Connector |
| Date Deposited: | 11 Sep 2024 09:30 |
| Last Modified: | 25 Sep 2024 18:09 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/96698 |
| DOI: | 10.1093/glycob/8.2.147 |
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