On 5/2/19 6:59 AM, Saumyak Mukherjee wrote:
Dear All,

I have an insulin hexamer, which (because of PBC)  apparently breaks into
pieces after simulation.

To make the molecule whole, I use the following command:

gmx trjconv -f traj.xtc -s md.tpr -o traj_whole.xtc -pbc cluster

or

gmx trjconv -f traj.xtc -s md.tpr -o traj_whole.xtc -pbc mol -ur compact

This command(s) makes each chain (out of the 6) whole, but the chains do
not come together. So the hexamer as a whole still remains broken.

Is there a way to solve this problem?

Use -center with an index group corresponding to residues that constitute the interface of one protein.

-Justin

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Justin A. Lemkul, Ph.D.
Assistant Professor
Office: 301 Fralin Hall
Lab: 303 Engel Hall

Virginia Tech Department of Biochemistry
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jalem...@vt.edu | (540) 231-3129
http://www.thelemkullab.com

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