Journal
CHEMBIOCHEM
Volume 9, Issue 3, Pages 433-438Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.200700470
Keywords
amylase; diabetes; enzymes; glucosidase; high-throughput screening; montbretin; obesity
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Specific inhibitors of human pancreatic a-amylase (HPA) have potential as oral agents for the control of blood glucose levels in the treatment of diabetes and obesity. In a search for novel inhibitors, a library of 30000 crude biological extracts of terrestrial and marine origin has been screened. A number of inhibitory extracts were identified, of which the most potent was subjected to 1 bioassay-guided purification. A family of three glycosylated acyl flavonols, montbretins A-C-1 was thereby identified and characterized as competitive amylase inhibitors, with K-i values ranging from 8.1-6100 nm. Competitive inhibition by myricetin, which corresponds to the flavone core, and noncompetitive inhibition by a second fragment, ethyl caffeiate, suggest a binding mode for these inhibitors.
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