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AMBER Archive (2008)Subject: AMBER: For help: how to perform double decoupling thermodynamic integration calculation in AMBER10
From: yongleli (yongleli_at_itcc.nju.edu.cn)
Dear Amber Users,
I am trying to calculate absolute binding free energy using termodynamic integration with double decoupling method(D. Hamelberg and J. A. McCammon, J. Am. Chem. Soc. 126, 7683, 2004). Assume A is a protein binding a ligand B,
A:B(sol)-------->A(sol)+B(gas) dG1
In my knowledge of AMBER, In TI calculation there are two prmtop files defining initiate state and final state. Here the final state seems to be a protein molecule in water and a ligand in vacuum. But I can only prepare a parmtop file containing a single protein in water. How can I deal with the ligand in gas phase?
yongleli
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