Hi Paul,

Usually I just Sketch the molecule, I make sure that the bond types are OK (single, double, aromatic etc.) and I do an idealization in Sketcher, then use the resulting .cif file in RefMac.

Flip

Paul Lindblom wrote:
Hi all,

I need to create a cif file for a new ligand that does not exist in the pdb, so far. Normally refmac created such a cif file when I merged the ligand to the structure, but this time it stops with a "fatal error". I think the alternatives are "sketcher" and the prodrg server. Can anybody tell me if I have to define the geometric restraints by myself, or is it possible to take just the output files and put them into refmac.? And if I have to define the geometric restraints, how to do this?

Thanks,

Paul

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