PDBeSIFTS Get All Structures

Get all PDB structures for a UniProt protein, grouped by PDB entry with chain details, from PDBe SIFTS. Unlike best_structures which returns a flat ranked list, this groups results by PDB ID showing all chains per structure, sorted by resolution. Useful for comprehensive structural coverage analysis. Example: P04637 (TP53) has structures across hundreds of unique PDB entries covering different domains and complexes.