A series of databases related to the Protein Data Bank (PDB) are presented to support research in macromolecular structure analysis. These databases include DSSP for secondary structure, PDBREPORT for structure quality and errors, HSSP for multiple sequence alignments, PDBFINDER for summaries of PDB files, and PDB_REDO for re-refined structures. The databases are updated weekly and provide tools for analyzing protein structures in various fields such as structural genomics, cancer biology, and protein design. The PDB_REDO database contains re-refined X-ray structures, improving the accuracy of structural models. The WHY_NOT database tracks reasons why certain entries cannot be created. The PDBFINDER and PDBFINDER2 databases offer compact, searchable summaries of PDB entries, including structural and sequence information. These databases are used for data mining, structure analysis, and visualization. The databases are maintained automatically, with new entries added as PDB entries are updated. The systems are interconnected, with dependencies between them, and are updated with each new PDB release. The databases are accessed through various tools and web services, and future work focuses on improving their usability and accessibility.A series of databases related to the Protein Data Bank (PDB) are presented to support research in macromolecular structure analysis. These databases include DSSP for secondary structure, PDBREPORT for structure quality and errors, HSSP for multiple sequence alignments, PDBFINDER for summaries of PDB files, and PDB_REDO for re-refined structures. The databases are updated weekly and provide tools for analyzing protein structures in various fields such as structural genomics, cancer biology, and protein design. The PDB_REDO database contains re-refined X-ray structures, improving the accuracy of structural models. The WHY_NOT database tracks reasons why certain entries cannot be created. The PDBFINDER and PDBFINDER2 databases offer compact, searchable summaries of PDB entries, including structural and sequence information. These databases are used for data mining, structure analysis, and visualization. The databases are maintained automatically, with new entries added as PDB entries are updated. The systems are interconnected, with dependencies between them, and are updated with each new PDB release. The databases are accessed through various tools and web services, and future work focuses on improving their usability and accessibility.