[Chimera-users] matching peptides with altenate locations

[Elaine Meng]

Hi Sumitro,
OK, I have 1akj as model 0 and 2gtz as model 1.  The second command  
you gave will work if you remove the spaces before and after "|":

match #0:1-5.c at ca #1:1-3.c at ca|#1:4-5.c at ca.a

The space is used to separate the two sets of atoms.  The first  
command you gave wouldn't work because only some of the residues in #1  
have alternate locations.

If you want to use all nine residues, here is one possibility:

match #0:1-9.c at ca #1:1-9.c at ca&~@.b

meaning ...and not alternate location B.  If there were more alternate  
locations (C,D,...) you would also need to exclude those.  I hope this  
helps,
Elaine
-----
Elaine C. Meng, Ph.D.                          meng at cgl.ucsf.edu
UCSF Computer Graphics Lab and Babbitt Lab
Department of Pharmaceutical Chemistry
University of California, San Francisco
                      http://www.cgl.ucsf.edu/home/meng/index.html

On Dec 14, 2009, at 11:23 AM, Sumitro Harjanto wrote:

> Hi,
> I would like to match two peptides; one with alternate conformations  
> in residue 4 and 5. I have tried:
>
> match   #0:1-9.c at ca   #1:1-9.c at ca.a
>
> match   #0:1-5.c at ca   #1:1-3.c at ca   |   #1:4-5.c at ca.a
>
> but both don’t work and give me the “unequal number of atom chosen”  
> error message.
>
> I tried changing match to sel in the latter case and I can get 10  
> atoms; 5 from each model, which is what I intended.
> How should I deal with this?
> Thanks,
> Sumitro