The NCBI MMDB (46) contains experimentally determined coordinate sets from the Protein Data Bank (47), augmented with domain annotations and links to relevant literature, protein and nucleotide sequences, chemicals (PDB heterogens) and conserved domains in CDD (48) as well as structural neighbors computed by the VAST algorithm (49,50) on compact structural domains in the 3D Domains database. Structure record summaries retrieved by text searches display thumbnail images of structures that link to interactive views of the data in Cn3D (51), the NCBI structure and alignment viewer. NCBI also provides precomputed BLAST results against the PDB database for all proteins in Entrez through the ‘Related Structures’ link.
