Protein Data Bank (PDB): archive of macromolecular structures

Contents and key characteristics

Each PDB entry contains several components: atomic coordinate files that specify the position of atoms, information about macromolecular chains and ligands, experimental data or links to it, and annotations describing biological assembly, provenance and functional context. Over time the archive has moved from a single plain-text format to richer, standardized formats that better support validation, software interoperability and automated reuse.

History and governance

Established in the 1970s as the first centralized collection of macromolecular structures, the PDB has expanded alongside advances in structural biology. The Worldwide Protein Data Bank (wwPDB) now coordinates the archive, sets deposition and annotation standards, and runs regional centers. Public deposition is reinforced by policies of journals and funders — for example, major agencies such as the National Institutes of Health in the United States and leading publishers expect structural data to be deposited at publication.

Uses, applications and importance

Researchers use PDB records to study molecular mechanisms, interpret genetic variation, guide drug discovery and build computational models. Educators and students rely on the archive for visualization and teaching. The PDB also underpins many derivative resources that map structure to sequence, chemistry and function, enabling large-scale analyses across families and species.

Related resources and classifications

• Validation reports and deposition tools maintained by wwPDB help ensure data quality and consistency.
• Structural classification schemes (for example, hierarchical groupings used by specialist databases) organize entries by fold and evolutionary relationships.
• Secondary databases repackage PDB data to support ligand chemistry, protein families, and genome annotations.

Notable facts

As an open, curated archive, the PDB enables reproducible structural science and cross-disciplinary research. It continues to adapt to new experimental techniques and metadata standards while remaining central to the study and application of molecular structure in biology and medicine.