Chem. J. Chinese Universities

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Studies on the Heme Prosthetic Group’s Geometry by ABEEM/MM Method

CUI Bao-Qiu1,2, GUAN Qing-Mei1, GONG Li-Dong1, ZHAO Dong-Xia1, YANG Zhong-Zhi1*   

    1. College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China;
    2. Department of Chemistry, Jinzhou Teacher College, Jinzhou 121000, China
  • Received:2007-02-09 Revised:1900-01-01 Online:2008-03-10 Published:2008-03-10
  • Contact: YANG Zhong-Zhi

Abstract: Applying the developed parameters, the heme prosthetic group was simulated by the ABEEM/MM method. The results show that these simulations can reproduce better X-ray structures than CHARMM method. The distorted ruffing conformational energies obtained from the ABEEM/MM method agree well with those by B3LYP/6-31G* method. The linear correlation coefficient R is over 0.98. The investigations show that the twist-angles have important effects on the ruffing conformational energies. The accurate charge for Cytochrome c552 from ABEEM/MM method can be used to investigate better the polarization effects than those from CHARMM method.

Key words: ABEEM/MM method, Heme, Geometry, Conformational energy, Charge distribution

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