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

Elaine Meng meng at cgl.ucsf.edu
Fri Mar 9 09:18:00 PST 2018

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.

The other way is with the “combine” command, which has analogous keyword options.

I hope this helps,
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  
> […] 
> 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

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