We added small molecule cif support in ChimeraX 1.6. So you need to update your version of ChimeraX. If a .cif file isn't a mmCIF, it will try to open it as a small molecule cif file. And, in your case, you can open the CIR ligand without downloading it first with: open cir from ccd or: open ccd:cir ccd stands for the PDB's Chemical Component Dictionary that has all of the PDB's residue information, including the ligands. -- Greg On 10/16/2023 8:47 AM, Jaremko, Matt Joseph via ChimeraX-users wrote:
Sorry, this was the original error message:
*From: *"Jaremko, Matt Joseph" <matt.jaremko@merck.com> *Date: *Monday, October 16, 2023 at 11:45 AM *To: *ChimeraX Users Help <chimerax-users@cgl.ucsf.edu> *Subject: *Open small molecule cif
Hello,
How do you open cifs for ligands? I’ve downloaded citrulline from the PDB database (attached), but I can’t open in ChimeraX:
Thank you,
Matt
*Matt J. Jaremko, Ph.D. (He|Him)*
Senior Scientist | Protein & Structural Chemistry
Merck Research Labs | 2000 Galloping Hill Rd. | Kenilworth, NJ 07033
Office: 908.740.5613 | Cell: 808.741.6277 | Email: matt.jaremko@merck.com <mailto:matt.jaremko@merck.com>
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