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Citation: CUI Bao-Qiu, NG Li-Dong, ZHAO Dong-Xia. Molecular Dynamics Simulation of Microperoxidase in Aqueous Solution in Terms of the ABEEM/MM Method[J]. Acta Physico-Chimica Sinica, ;2008, 24(06): 1035-1040. doi: 10.3866/PKU.WHXB20080621 shu

Molecular Dynamics Simulation of Microperoxidase in Aqueous Solution in Terms of the ABEEM/MM Method

1.
College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, Liaoning Province, P. R. China; Department of Chemistry, Jinzhou Teacher College, Jinzhou 121000, Liaoning Province, P. R. China

Received Date: 4 December 2007
Available Online: 9 April 2008

In terms of the atom-bond electronegativity equilization fluctuating charge molecularmechanics(ABEEM/MM), molecular dynamics simulation on aqueous microperoxidases (MP) was performed. The impact of water molecules on the structure of MP, the ruffling conformation of the heme, and the orientation of the axially ligated imidazole were investigated. Results show that, in the aqueous solution, the backbone amino acids of the MP are stable, while the ruffling conformation of heme turns to be planar, which comes from the interaction between water and MP. The orientation of the axially coordinated imidazole is mainly determined by the histidine bonded with the imidazole, while the electrostatic force between the imidazole and the side-chained propionic acid group of the heme is only a subsidiary factor.
- ABEEM/MMfluctuating charge molecular force field; Microperoxidase; Heme; Conformation; Molecular dynamics simulation
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