| Literature DB >> 19375693 |
Paul Guyett1, John Glushka, Xiaogang Gu, Maor Bar-Peled.
Abstract
The conversion of UDP-alpha-d-glucuronic acid to UDP-alpha-d-xylose and UDP-alpha-d-apiose by a bifunctional potato enzyme UDP-apiose/UDP-xylose synthase was studied using real-time nuclear magnetic resonance (NMR) spectroscopy. UDP-alpha-d-glucuronic acid is converted via the intermediate uridine 5'-beta-l-threo-pentapyranosyl-4''-ulose diphosphate to UDP-alpha-d-apiose and simultaneously to UDP-alpha-d-xylose. The UDP-alpha-d-apiose that is formed is unstable and is converted to alpha-d-apio-furanosyl-1,2-cyclic phosphate and UMP. High-resolution real-time NMR spectroscopy is a powerful tool for the direct and quantitative characterization of previously undetected transient and labile components formed during a complex enzyme-catalyzed reaction.Entities:
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Year: 2009 PMID: 19375693 PMCID: PMC4000172 DOI: 10.1016/j.carres.2009.03.026
Source DB: PubMed Journal: Carbohydr Res ISSN: 0008-6215 Impact factor: 2.104