AMBER Archive (2006)Subject: Re: AMBER: angle between planes
From: Chris Moth (chris.moth_at_vanderbilt.edu)
Date: Fri Apr 07 2006  16:19:26 CDT
This is low tech  but.....
Wth ptraj you could certainly strip out all atoms but the 6 of interest,
trajout these out to a file, and then, with a bit of manipulation,
import them into,say, Excel for final calculation of angles between
planes (which will be calculation of angle between vectors normal to
planes).
I hope someone suggests something a bit more elegant...
Chris
John wrote:
> Dear All,
>
> I would like to calculate the relative orientation between side chains of
> opposite peptide strands. I believe that this can be done by defining a
> plane for each side chain using 3 carbon atoms from each side chain and then
> calculating the angle between the two planes by stepping through the
> trajectory frames. Is it possible to do something like this with ptraj? The
> "angle" function if I understand correctly calculates angles between 3 atoms
> and I don’t think it would give a meaningful result for my problem.
>
> Thank you very much for any advice.
>
> Regards,
>
> John
>
>

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