Dear all,
I've been lecturing in a structural bioinformatics course where graduate students (always consisting of people without crystallography background to that point) are expected to understand the basics on how x-ray structures are obtained, so that they know what
they are using in their bioinformatics projects. Practices include letting them manually build a segment from an excellent map and also using Coot to check problems in not so good structures.
I wonder if there's a list of problematic structures somewhere that I could use for that practice? Apart from a few ones I'm aware of because of (bad) publicity, what I usually do is an advanced search on PDB for entries with poor resolution and bound ligands,
then checking then manually, hopefully finding some examples of creative map interpretation. But it would be nice to have specific examples for each thing that can go wrong in a PDB construction.