期刊
JOURNAL OF COMPUTATIONAL CHEMISTRY
卷 32, 期 5, 页码 932-942出版社
WILEY-BLACKWELL
DOI: 10.1002/jcc.21678
关键词
AMBER-GAUSSIAN interface; ab initio QM/MM-MD simulation; free energy gradient method; The CHIEF charge
资金
- Ministry of Education, Culture, Sport, Science and Technology (MEXT) in Japan
- Japan Science and Technology Agency (JST)
- Grants-in-Aid for Scientific Research [23370068, 23550021] Funding Source: KAKEN
For applying to a number of theoretical methodologies based on an ab initio quantum mechanical/molecular mechanical (QM/MM) molecular dynamics method connecting AMBER9 with GAUSSIAN03, we have developed an AMBER-GAUSSIAN interface (AG-IF), which can be one of the simplest architectures. In the AG-IF, only a few subroutines addition is necessary to retrieve the QM/MM energy and forces, obtained by GAUSSIAN, for solving a set of Newtonian equations of motion in AMBER. It is, therefore, easy to be modified for individual applications since AG-IF utilizes most of those functions originally equipped not only in AMBER but also in GAUSSIAN. In the present minimal implementation, only AMBER is modified, whereas GAUSSIAN is left unchanged. Moreover, a different method of calculating electrostatic forces of MM atoms interacting with QM region is proposed. Using the AG-IF, we also demonstrate three examples of application: (i) the QM versus MM comparison in the radial distribution function, (ii) the free energy gradient method, and (iii) the charge from interaction energy and forces. (C) 2010 Wiley Periodicals, Inc. J Comput Chem 32: 932-942, 2011
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