Hi Prathvi,
There is no OPM fetch -- instead you go to the OPM database website and download the file(s) that you want onto your computer.  Then you use "open" to open a local PDB file.
I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Mar 15, 2023, at 12:33 AM, Prathvi Singh via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
>
> Hi Elaine,
> I was wondering where it is possible to use the "open" command to import PDB structures of membrane proteins from OPM. I see in: https://www.cgl.ucsf.edu/chimerax/docs/user/commands/open.html#fetch that we can fetch data from various sources but OPM was not listed there. If this were possible, we could directly import membrane protein structures from OPM which have dummy residues that can be used to define membrane boundaries via the define plane command.
> Thank you
> --
> Prathvi Singh,
> Research Fellow,
> Department of Biological Sciences & Bioengineering,
> Indian Institute of Technology, Kanpur-208016