1U2Y image
Entry Detail
PDB ID:
1U2Y
Keywords:
Title:
In situ extension as an approach for identifying novel alpha-amylase inhibitors, structure containing D-gluconhydroximo-1,5-lactam
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2004-07-20
Release Date:
2004-09-07
Method Details:
Experimental Method:
Resolution:
1.95 Å
R-Value Free:
0.19
R-Value Work:
0.16
R-Value Observed:
0.16
Space Group:
P 21 21 21
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:Alpha-amylase, pancreatic
Chain IDs:A
Chain Length:496
Number of Molecules:1
Biological Source:Homo sapiens
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
ASN A ASN GLYCOSYLATION SITE
PCA A GLN PYROGLUTAMIC ACID
Primary Citation
In Situ Extension as an Approach for Identifying Novel alpha-Amylase Inhibitors.
J.Biol.Chem. 279 48282 48291 (2004)
PMID: 15304511 DOI: 10.1074/jbc.M406804200

Abstact

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.

Legend

Protein

Chemical

Disease

Primary Citation of related structures