6 Jul
2020
6 Jul
'20
4:01 p.m.
Hi, I'd like to generate mmCIF files (using my own software) that can be read by Chimera. The problem is that sometimes I don't know the full sequence (SEQRES), so I don't know values for _atom_site.label_seq_id. If I skip label_seq_id entirely, the file doesn't load. ChimeraX gives warning: "Skipping atom_site category: Missing column 'label_seq_id'". If I set all label_seq_id values to null ('.') I get warning: "Unable to infer polymer connectivity due to unspecified label_seq_id for residue "ARG" near line 125" and all residues are disconnected. How should the mmCIF look like so that Chimera infers the connectivity in the same way as it does for PDB files? Cheers, Marcin