Check out Robert Campbell's Pymol script repository.
I think align_all_to_all.py should do what you want, including exporting 
RMSD values.

http://pldserver1.biochem.queensu.ca/~rlc/work/pymol/

Jed


On 1/7/2014 11:58 AM, Om Shiv wrote:
> Hello All
>
> I am a new user to Pymol and Python.
>
> I have a PDB Structure with single chain (A) and I have modeled 500
> single point mutants of this wild structure.
>
> Now for each such 500 modeled structures, I would like to calculate RMSD
> (ALL ATOMS) with the wild type PDB structure.
>
> Can anybody help me with the script to automate calculation of 500 RMSD
> calculations using PYMOL ?
>
> Secondly, what threshold value of RMSD can be considered above which we
> can say that the mutant structure is considerably different than the
> wild type ?
>
> Thanks in advance.
>
>
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-- 
------------------------
Jed Goldstone, PhD
Research Specialist
Woods Hole Oceanographic Institution
Redfield 3-52 MS#32
Woods Hole, MA 02543
http://www.whoi.edu/hpb/Site.do?id=481
Phone: 508-289-4823

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