Is there any reliable way of, given a PDBID, finding roughly all the experimental structures corresponding to the same protein (structure and perhaps function) in different organisms? For example,1A4H and 1UY6 are both HSP90 realizations in yeast and human. I guess I can rephrase the question like this: how can I find roughly all PDBs that are orthologues to a given PDB.
I know that "same protein", as I'm using it here, is quite an abusive and vague term. To make things clearer, our research is about docking and so here is a second related question: are there any rules of thumb as for when is it licit/useful to use structures from different organisms to perform docking studies?
Thanks a million