|July 2015||250,325||631,670||2384.59 GB|
|August 2015||245,663||593,903||2055.11 GB|
|September 2015||320,847||761,756||2874.63 GB|
The Worldwide Protein Data Bank and the Cambridge Crystallographic Data Centre (CCDC) have released a new data resource containing correspondences between the biopolymer components and ligand molecules found in the PDB archive that exactly match small-molecule X-ray structures in the Cambridge Structural Database (CSD) archive.
The chemical structure of every unique molecule in the PDB archive is described in the PDB Chemical Component Dictionary (CCD). The new PDB Chemical Component Model data file complements information in the PDB by providing the following CSD information for matching molecular entries: accession code correspondences, Cartesian coordinates and R-value, data-collection temperature and a disorder flag, SMILES and InChI descriptors, and a Digital Object Identifier (DOI) for the citation associated with the CSD entry.
The CCD contains more than 20,000 components; ~1500 exact match structures have been identified in the CSD. The new PDB Chemical Component Model file is available from the PDB FTP archive. As a service to the scientific community, the wwPDB partners and the CCDC make all these files available freely and without restrictions on use.
Work at the CCDC was supported by BBSRC grant BB/K016970/1 to PDBe and work at RCSB PDB was supported by NSF grant DBI-1338415.
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