[Chimera-users] Cannot save PDB as multiple chains of a single model.

[Elaine Meng]

Dear Teige,
You need to first combine the models into a multichain single model, then save the single model.

One way is in Model Panel (show this tool from the Favorites menu): with the mouse, highlight the rows of the models that you want to combine (left side of dialog), and click the “copy/combine” button (list of functions in right side of dialog).  In the resulting dialog, choose the “rename them uniquely” option for chain IDs.  Set other options as you like.
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/modelpanel.html>

The other way is with the “combine” command, which has analogous keyword options.
<http://www.rbvi.ucsf.edu/chimera/docs/UsersGuide/midas/combine.html>

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Mar 9, 2018, at 7:51 AM, Matthews-Palmer, Teige Rowan Seal <t.matthews-palmer14 at imperial.ac.uk> wrote:
> 
> Dear Chimera-users,
> 
> I have a PDB file containing a single chain, that I have copied and applied turns about a symmetry axis. So now I have several models with transformed positions. When I save PDB>save multiple models in a single file, my output PDB does not seem to handle CHAINID properly.
> If my input PDB has CHAINID A and ends with TER, then my output PDB has everything as CHAINID A, no TER, and instead separates the models by 
> MODEL		1  
> […] 
> ENDMDL
> MODEL		2
> [...etcetera]
> 
> I would like to save a PDB with these symmetrical copies as different chains A,B,C… (and not different models). Can anyone suggest a way to do this?
> Help greatly appreciated.
> Teige