[gmx-users] EM and positional restrain
zhoumadison at gmail.com
Fri Jul 1 17:47:24 CEST 2005
I am doing a simulation with a protein-ligand system. According to
standard protocol, there should be energy minimization (EM) steps
before and after adding ions. Should I do positional restrain on
protein-ligand (put define= -DPOSRES into em.mdp file), or just use
flexible water (put define= -DFLEXIBLE into em.mdp file) during both
EM steps? If I don't restrain the position of protein-ligand, will the
EM change the starting structure?
I saw some people using flexible water here. What is the reason for that?
For the two EMs, should I use steep for both or use steep + cg?
Thanks in advance.
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