Hi Hernando, As mentioned you can't do it in Chimera. You would need to find some other program or server that does it (unfortunately I don't know of any ... other chimera-users, opinions?) or just write a script. Depending on how robust to different types of input it must be, the script could be fairly simple. I attach a little fortran program 'multichain.f' I just whipped up. If you are on some unix-type computer with a fortran compiler, you could just compile it with something like f77 multichain.f -o multichain then just enter multichain or whatever you called the executable at the command line, and it would prompt you for input and output file names. Disclaimers: This program worked fine on the one NMR ensemble I tested it on, but I did not test it comprehensively. It is pretty simple and does not change any atom or residue numbers, and does not add SEQRES, so if you need that stuff you would need to use something else. I only provided for up to 26 chains because I couldn't remember what IDs aresupposed be used after that, but it could easily be modified to accommodate more chains. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. meng@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 On Aug 31, 2008, at 6:54 AM, hsosa@aecom.yu.edu wrote:
Hi Elaine,
The problem I have is actually not whith chimera. itself. I can display all the models etc nicely within it. However, I want to make now a PDB file of a multi-protein complex in a format that can be deposited in the PDB database. Then I run into problems if the models are separated by Model ENDMDL lines or have chains with the same letter identifier. I was hoping to be able to generate a multi-protein PDB file from my chimera fitting without having to manually edit a lot of lines in the multimodel PDB file. Any suggestions on how to best do this would be appreciated.
Thanks
Hernando
Elaine Meng wrote:
Hi Hernando, Sorry, Chimera does not have an option for changing chain IDs.
However, in Chimera I find it more convenient to work with structures read as multiple models as opposed to multiple chains in a single model: