[Chimera-users] Saving multiple identical PDB in a single file with unique chain ID

[Elaine Meng]

Hi Ahmad,
The “copy/combine” dialog has a choice “If original moleculea have duplicate single-letter chain IDs, then: rename them uniquely”  which is the default.  Make sure that that option is chosen (or if you are using the “combine” command, it also has “newchainids true” by default).

Also make sure you choose with the mouse in that dialog all the models you want to combine (highlight all the rows for those models).

Maybe it is confusing that your original models are still open at the same time as the new combined model.  If you look only at the new combined model, it should not have any duplicate chain IDs if the default option mentioned above is used. 

Your question confuses me because if the starting structure is a monomer, it would only contain A (not B).  However, even if your original structure is a dimer (A and B) if you combine multiples of either one, you should end up with only one A and only one B, etc. in the single combined model.

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

> On Apr 19, 2018, at 8:34 AM, Ahmad Abdelzaher <underoath006 at gmail.com> wrote:
> 
> Hello,
> 
> I'm building a tubulin lattice. I want to save the structure as a single model, however, the chain ID for each monomer should be different from the other ones. If I copy/combine my alpha-beta tubulin monomer, I get another structure with A and B chains. What I want is different chain letters. 
> 
> How can I do it?
> 
> Regards.