Hello Elaine, That is perfect. Thank you very much! Carlos Sent with ProtonMail Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Monday, September 16, 2019 1:44 PM, Elaine Meng <meng@cgl.ucsf.edu> wrote:
Hello Carlos, Try these commands:
select ligand & nucleic acid z<10 ~select protein z<10
I tried it on examples of nucleic acid structures with ligand and with and without protein: 6raw and 6gld, respectively.
If you want just one line of commands, you can put them together with a semicolon between. 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 Sep 13, 2019, at 11:52 AM, Carlos G. Oliver cgoliver@protonmail.com wrote: Hello, I would like to select all ligands that are within a distance of nucleic acids but above a distance from proteins. The selection command I have so far is: `select nucleic acid z<10 & protein z>10 & ligand` This works for PDBs that contain both nucleic acids and protein. However, some will only contain nucleic acids, and in this case the `protein z>10` condition will result in an empty selection even when there is a valid ligand. I was wondering if there was a way to check whether the model contains protein to run a different selection command for each case, or to use a different selection command which handles both cases. Thanks! Carlos G. Oliver