From: Jeffrey Potoff (
Date: Sun Apr 21 2013 - 13:24:20 CDT

On 4/21/2013 3:10 AM, Ganesh Shahane wrote:
> Dear all,
> Is there a way to calculate the dihedral angles (e.g
> chi1) of a particular amino acid along the entire trajectory using
> VMD? The angle measures should be presented in a graphical format,
> with the measure of angle on Y-axis and time on X-axis.
> --
> Ganesh
> MSc Bioinformatics
> University of Pune.

You should look at the "measure dihedral" command

This is a good example:

Someone else has written a TCL script to do this (don't know how well it
works, but it does exist)

Jeffrey J. Potoff
Associate Professor			  Wayne State University
Department of Chemical Engineering and Materials Science
5050 Anthony Wayne Dr			  Phone:(313)577-9357		
Detroit, MI 48202  	                  Fax:  (313)578-5815