[AMBER] Is minimization and equilibration needed in umbrella sampling?

From: Qing Lv <lvqingjiejie.163.com>
Date: Fri, 10 Jan 2020 23:46:29 +0800 (CST)

Dear Colleagues,

I am doing a QM/MM umbrella sampling to calculate the PMF of an enzymatic reaction. The initial coordinates (with solvents and ions) for each sampling window were extracted from previous trajectories and the velocities were generated with ig=-1. The reaction coordinate (bond length difference) of each initial frame was closed to the center of the window. So, need I do energy-minimization and equilibration for each window? Since each initial conformation has no bad clashes (actually they can run MD well without minimizations) and is closed to the window center, I cannot understand why minimization and equilibration are still needed (as a lot of references do so).

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Received on Fri Jan 10 2020 - 08:00:02 PST
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