<div dir="ltr">Dear all,<br>
<br>
I have a mutation free energy calculation from D(asp) to E(glu). The
charge is not changed for the overall mutation. However, following Dr.
David Mobley's suggetion, electrostatic and VDW interaction should be
modified separately, so in the first step we need to turn off the
charge from D(-1) to D(0).<br>
<br>
I learn from the mailing list that it is problematic to do FE calculations with different charges for initial and final states.<br>
So is that safe to turn off the charge for D and turn on the same charge for E in this case?<br>
If not, it that OK to perform mutation FE calculation in one step?<br>
or there is no safe way to handle this kind mutations, i.e. mutating charge groups, currently without special correction?<br>
<br>
thanks a lot<br>
<br>
Qiang</div>