[Chimera-users] Merging models

[Elaine Meng]

On Apr 30, 2009, at 1:45 PM, #MAZIAR SOLEYMANI ARDEJANI# wrote:

> Hi everybody,
>
> I'm working with a pdb file (http://www.rcsb.org/pdb/files/2vxi.pdb1.gz 
> ) made of two models. I need to merge this two models into one. How  
> can I do that?
>
> Thanks in advance,
>
> Maziar S. Ardejani
> Lab 9, The Orner Lab
> Division of Chemistry and Biological Chemistry
> School of Physical and Mathematical Sciences
> 21 Nanyang Link
> Nanyang Technological University
> Singapore 637371
>

Hi Maziar,
In general, you can merge models with the "copy/combine" button on the  
right side of the Model Panel (Favorites... Model Panel) or with the  
"combine" command.
<http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/modelpanel.html>
<http://www.cgl.ucsf.edu/chimera/docs/UsersGuide/midas/combine.html>

However, I opened 2vxi from the PDB and it is only one model, not  
two.   Maybe you opened it two times by mistake?
<http://www.rcsb.org/pdb/explore/explore.do?structureId=2VXI>

There are a few cases where structures have so many atoms or chains  
that the PDB has split them into multiple files (e.g. 3bz1 and 3bz2).   
If those parts collectively have more than 63 chains it won't work to  
merge them with Chimera because there are only 63 possible different  
chain ID symbols.

Please send Chimera questions to chimera-users at cgl.ucsf.edu and not to  
me directly, and if possible use an informative "subject" line - thanks!

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                          meng at cgl.ucsf.edu
UCSF Computer Graphics Lab (Chimera team) and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco
                      http://www.cgl.ucsf.edu/home/meng/index.html