PDBSprotEC: a Web-accessible database linking PDB chains to EC numbers via SwissProt

Summary: A mapping between chains in the Protein Databank and Enzyme Classification numbers is invaluable for research into structure–function relationships. Mapping at the chain level is a non-trivial problem and we present an automatically updated Web-server, which provides this link in a queryable form and as a downloadable XML or flat file. Availability: The query interface and downloadable files may be accessed at http://www.bioinf.org.uk/pdbsprotec/ Supplementary information: Further details of the methods used are available at http://www.bioinf.org.uk/pdbsprotec/methods/