Unknown

Dataset Information

0

Cl-pi interactions in protein-ligand complexes.


ABSTRACT: During systematic analysis of nonbonded contacts in protein-ligand complexes derived from crystal structures in the Protein Data Bank, Cl-pi interactions have been found, not only in the well-documented serine proteases but also, to a lesser extent, in other proteins. From geometric analysis of such Cl-pi interactions in the crystal structures, two distinct geometries were found: the "edge-on" approach of a Cl atom to a ring atom or C-C bond and the "face-on" approach toward the ring centroid with an average interatomic distance of 3.6 A. High-level ab initio calculations using benzene-chlorohydrocarbon model systems elucidated that the calculated Cl-pi interaction energy is -2.01 kcal/mol, and the dispersion force is the major source of attraction. We also discussed the geometric flexibility in Cl-pi interactions and a relationship between the intensity of the pi density in an aromatic ring and the interaction position of the Cl atom.

SUBMITTER: Imai YN 

PROVIDER: S-EPMC2442010 | biostudies-literature | 2008 Jul

REPOSITORIES: biostudies-literature

altmetric image

Publications

Cl-pi interactions in protein-ligand complexes.

Imai Yumi N YN   Inoue Yoshihisa Y   Nakanishi Isao I   Kitaura Kazuo K  

Protein science : a publication of the Protein Society 20080423 7


During systematic analysis of nonbonded contacts in protein-ligand complexes derived from crystal structures in the Protein Data Bank, Cl-pi interactions have been found, not only in the well-documented serine proteases but also, to a lesser extent, in other proteins. From geometric analysis of such Cl-pi interactions in the crystal structures, two distinct geometries were found: the "edge-on" approach of a Cl atom to a ring atom or C-C bond and the "face-on" approach toward the ring centroid wi  ...[more]

Similar Datasets

| S-EPMC7496880 | biostudies-literature
| S-EPMC4077163 | biostudies-literature
| S-EPMC10448718 | biostudies-literature
| S-EPMC6776977 | biostudies-literature
| S-EPMC9114321 | biostudies-literature
| S-EPMC9298319 | biostudies-literature
| S-EPMC9305286 | biostudies-literature
| S-EPMC4584387 | biostudies-literature
| S-EPMC4836644 | biostudies-literature
| S-EPMC3897944 | biostudies-literature