Download MendeleyIn Situ Extension as an Approach for Identifying Novel alpha-Amylase Inhibitors.
Numao, S., Damager, I., Li, C., Wrodnigg, T.M., Begum, A., Overall, C.M., Brayer, G.D., Withers, S.G.(2004) J Biol Chem 279: 48282-48291
- PubMed: 15304511
- DOI: https://doi.org/10.1074/jbc.M406804200
- Primary Citation of Related Structures:
1U2Y, 1U30, 1U33 - PubMed Abstract:
A new approach for the discovery and subsequent structural elucidation of oligosaccharide-based inhibitors of alpha-amylases based upon autoglucosylation of known alpha-glucosidase inhibitors is presented. This concept, highly analogous to what is hypothesized to occur with acarbose, is demonstrated with the known alpha-glucosidase inhibitor, d-gluconohydroximino-1,5-lactam. This was transformed from an inhibitor of human pancreatic alpha-amylase with a K(i) value of 18 mm to a trisaccharide analogue with a K(i) value of 25 mum. The three-dimensional structure of this complex was determined by x-ray crystallography and represents the first such structure determined with this class of inhibitors in any alpha-glycosidase. This approach to the discovery and structural analysis of amylase inhibitors should be generally applicable to other endoglucosidases and readily adaptable to a high throughput format.
Organizational Affiliation:
Department of Chemistry, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
