Ragothaman Yennamalli wrote:
Hi,
While viewing a trajectory I am trying to see how a particular part or group is behaving, while keeping the rest frozen (I dont want them to move). For example, in a two domain protein keeping one domain frozen and seeing the other domain movement or in a protein ligand complex keeing the protein frozen and seeing the movement of the ligand. I tried -center in trjconv and selected the group that I need to center. Any other suggestions?

Use trjconv -fit rot+trans with a custom index group of whatever you'd like to keep (somewhat) fixed. You cannot fix any group's position with trjconv; you can only remove periodicity and to least-squares fitting to get a smooth trajectory.

-Justin

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Justin A. Lemkul
Ph.D. Candidate
ICTAS Doctoral Scholar
MILES-IGERT Trainee
Department of Biochemistry
Virginia Tech
Blacksburg, VA
jalemkul[at]vt.edu | (540) 231-9080
http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin

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