Molecular Recognition of Human Angiotensin-Coverting Enzyme I (hACE I) and Different Inhibitors

Author(s): Huiying Chu, Hanyi Min, Mingbo Zhang, Hujun Shen, Guohui Li.

Journal Name: Current Topics in Medicinal Chemistry

Volume 13 , Issue 10 , 2013

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Abstract:

The human angiontensin-converting enzyme I (hACEI) is a zinc metalloproteinase that hydrolytically cleaves a C-terminal dipeptide from a wide range of peptide substrates, and it plays an important role in regulating blood pressure. MD simulations and interaction energy calculations for docking and crystal structures were performed to investigate the correct conformation of the ACE with enalaprilat and nanopepetide. The analysis of root-mean-squrared fluctuation (RMSF), which is usually applied to measure the mobility and flexibility of the proteins, and dynamic correlation of residues show that the fluctuation pattern of the each two structure of the same ligand is almost the same mode. Hydrogen bond analysis shows that the correct crystal conformation is more stable than a wrong docking conformation. In addition, we are demonstrating that calculating interaction energy between protein and its ligands is an accurate and efficient way to select the correct conformation from docking conformations.

Keywords: ACE, different conformations, binding mode, interaction energy.

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Article Details

VOLUME: 13
ISSUE: 10
Year: 2013
Page: [1211 - 1221]
Pages: 11
DOI: 10.2174/15680266113139990008
Price: $58

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