Title

Three-Dimensional Quantitative Structure-Activity Relationship and Comparative Molecular Field Analysis of Dipeptide Hydroxamic Acid Helicobacter pylori Urease Inhibitors

Document Type

Article

Publication Date

8-2002

Publication Source

Antimicrobial Agents and Chemotherapy

Abstract

A homology model of Helicobacter pylori urease was developed by using the crystal structure of urease from Klebsiella aerogenes (EC 3.5.1.5) as a template. The acetohydroxamic acid moiety was docked into the active pocket of the enzyme model, followed by relaxation of the complex by use of molecular dynamics. The resulting conformation was used as a template to construct 24 potential dipeptide hydroxamic acid inhibitors with which comparative molecular field analysis (CoMFA) was performed. The resulting model provided a cross-validation correlation coefficient (q2L00) of 0.610, a conventional r2 value of 0.988, and an F (Fisher indication of statistical significance) value of 294.88. We were able to validate the CoMFA model by using the 50% inhibitory concentrations of six compounds that were not included in the construction of the model. A very good structural correlation was observed between the amino acids in the model urease's active pocket and the contour maps derived from the CoMFA model. This correlation, accompanied by the validation supplied by use of the CoMFA data, illustrates that the model can aid in the prediction and design of novel H. pyloriurease inhibitors.

Inclusive pages

2613-2618

ISBN/ISSN

0066-4804

Comments

Permission documentation is on file.

Publisher

American Society for Microbiology

Volume

46

Issue

8

Peer Reviewed

yes