Correlation analyses on binding affinity of substituted benzenesulfonamides with carbonic anhydrase using ab initio MO calculations on their complex structures (II).

Abstract:

:We proposed a novel QSAR (quantitative structure-activity relationship) procedure called LERE (linear expression by representative energy terms)-QSAR involving molecular calculations such as ab initio fragment molecular orbital and generalized Born/surface area ones. We applied LERE-QSAR to two datasets for the free-energy changes during complex formation between carbonic anhydrase and a series of substituted benzenesulfonamides. The first compound set (Set I) and the second one (Set II) include relatively small substituents and alkyl chains of different lengths in the benzene ring, respectively. Variation of the inhibitory activity in Set I is expressed as the combination of Hammett σ and the hydrophobic substituent constant π in classical QSAR, and variation in Set II only by π. LERE-QSAR analyses clearly revealed that effects of σ and π on the activity variations in Sets I and II are consistently explainable with the energy terms in the LERE formulation, and provide more detailed and direct information as to the binding mechanism. The proposed procedure was demonstrated to provide a quantitative basis for understanding ligand-protein interactions at the electronic and atomic levels.

journal_name

Bioorg Med Chem Lett

authors

Munei Y,Shimamoto K,Harada M,Yoshida T,Chuman H

doi

10.1016/j.bmcl.2010.11.050

subject

Has Abstract

pub_date

2011-01-01 00:00:00

pages

141-4

issue

1

eissn

0960-894X

issn

1464-3405

pii

S0960-894X(10)01662-8

journal_volume

21

pub_type

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