Codswallop

The whole family, filed.

Comparative Overview of Domains, Structures, Whole-families, Alignments, Ligands, Lineages, Organisms & PDB entries.

Hand it a protein and it does the fortnight of manual PDB trawling in ninety seconds: every entry, every construct, every ligand, cross-referenced and interactive.

Protein, PDB ID, accession, domain or sequence Open the drawer

Try 1AKI P00918 PF00062 TEM-1 beta-lactamase 4HHB
A PDB ID, a UniProt accession, a gene name, a Pfam or InterPro identifier, a raw sequence, or just what the protein is called. Anything ambiguous asks rather than guesses.