Download MendeleyEvaluation of Fluoropyruvate as Nucleophile in Reactions Catalysed by N-Acetyl Neuraminic Acid Lyase Variants: Scope, Limitations and Stereoselectivity.
Stockwell, J., Daniels, A.D., Windle, C.L., Harman, T.A., Woodhall, T., Lebl, T., Trinh, C.H., Mulholland, K., Pearson, A.R., Berry, A., Nelson, A.(2016) Org Biomol Chem 14: 105
- PubMed: 26537532
- DOI: https://doi.org/10.1039/c5ob02037a
- Primary Citation of Related Structures:
5A8G - PubMed Abstract:
The catalysis of reactions involving fluoropyruvate as donor by N-acetyl neuraminic acid lyase (NAL) variants was investigated. Under kinetic control, the wild-type enzyme catalysed the reaction between fluoropyruvate and N-acetyl mannosamine to give a 90 : 10 ratio of the (3R,4R)- and (3S,4R)-configured products; after extended reaction times, equilibration occurred to give a 30 : 70 mixture of these products. The efficiency and stereoselectivity of reactions of a range of substrates catalysed by the E192N, E192N/T167V/S208V and E192N/T167G NAL variants were also studied. Using fluoropyruvate and (2R,3S)- or (2S,3R)-2,3-dihydroxy-4-oxo-N,N-dipropylbutanamide as substrates, it was possible to obtain three of the four possible diastereomeric products; for each product, the ratio of anomeric and pyranose/furanose forms was determined. The crystal structure of S. aureus NAL in complex with fluoropyruvate was determined, assisting rationalisation of the stereochemical outcome of C-C bond formation.
Organizational Affiliation:
School of Chemistry, University of Leeds, Leeds, LS2 9JT, UK. a.s.nelson@leeds.ac.uk.
