I have downloaded from PDB 291 mmCIF files that have information for P53 structures. 289 of them have information for experimental strutures: 248 files correspond to X-RAY diffraction structures, 30 for NMR and 11 for EM. I would like to perform a quality control of the files, but I'm new to this format and I don't know which metrics I should check. Considering that the structures come from three different types of experiments, which metrics do you recommend checking in each type of experiment and is there any recommended threshold for them?
Thanks in advance