Hi Abhik

Additional to Phils suggestions, you can use chimera to superpose and render 
the images right away.

For this, load the pdb codes right into chimera (file -> fetch ID), then tools 
-> structure comparison -> match maker

Change the Chain pairing to specific chains in ref and match structures and 
choose the according chains. After the rigid body match, just save the session 
as is and render the images.


best, matthias


Dr. Matthias Barone

AG Kuehne, Rational Drug Design

Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP)
Robert-Rössle-Strasse 10
13125 Berlin

Germany
Phone: +49 (0)30 94793-284

________________________________
From: CCP4 bulletin board <[email protected]> on behalf of Philip D. 
Jeffrey <[email protected]>
Sent: Monday, September 14, 2020 11:10:20 PM
To: [email protected]
Subject: Re: [ccp4bb] How to save two superposed protein structures in PDB 
format

Hello Abhik

In coot use: Calculate>Merge Molecules to append one structure to another.  
Coot will change the chain labels for you, which might work out OK in this case.

Alternatively, I've done a lot of this in my time:
Make a copy of the reference PDB file
Open it in a simple text edit (emacs, vi etc)
Go to the end, remove the PDB 'END' statement
(Many programs stop reading a PDB file when they see an END)
Append the second, superimposed file.
For most chain labels you can also change them in a text editor but 'C' 'O' and 
'N' will cause you trouble.  You can do it easily in Coot.
This would take no more than 15 seconds in emacs.

>From the command line:
grep -v 'END' reference.pdb > reference2.pdb
egrep '^ATOM|^HETATM' superimposed.pdb >> reference2.pdb
(text editor to change chain labels, if you care, but there are ways to do that 
from the command line too)

Cheers
Phil Jeffrey
Princeton

________________________________
From: CCP4 bulletin board <[email protected]> on behalf of Abhik 
Mukhopadhyay <[email protected]>
Sent: Monday, September 14, 2020 4:55 PM
To: [email protected] <[email protected]>
Subject: [ccp4bb] How to save two superposed protein structures in PDB format

Hi,
How can I save two superposed protein structures in  PDB format? Is there any 
way I can do this in coot or pymol? There is only one chain in those two PDB 
structures.

Thanks in advance,
Abhik



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