Search and browse CATH's database classifying protein structures, with options to find a protein structure.
RCSB Protein Data Bank
RCSB PDB supports searching, visualizing, downloading, and analyzing protein structures and related sequence, structure, and function data.
About RCSB Protein Data Bank
RCSB Protein Data Bank provides access to 3D structural data from the Protein Data Bank, including experimental structures, integrative structures, and computed models from AlphaFoldDB and ModelArchive. As a member of the Worldwide PDB partnership, it curates and annotates PDB data to agreed standards.
Users can search by sequence, structure, and function annotations, visualize structures in 3D, and download data for analysis. Available tools include sequence and 3D similarity search, chemical similarity search, pairwise structure alignment, and genome view.
Key features
- Search structures by sequence, structure, and function annotations
- Visualize and download 3D protein structures
- Map sequence features onto 3D structure assemblies
- Search small molecules by SMILES, InChI, or formula
- Find similar nucleotide or protein sequences with MMseqs2
- Calculate pairwise structure alignments using various methods
Best for: Students to specialized scientists who work with protein sequence, structure, and function data.
Good for
- Curates and annotates PDB data to Worldwide PDB standards
- Provides search tools for sequence, structure, and function annotations
- Includes experimental structures and computed models in one site
RCSB Protein Data Bank at a glance
- Website
- rcsb.org
- Category
- Research & Data › Open Data & Datasets
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
RCSB Protein Data Bank alternatives
Tools and sites you could use instead, ranked by how closely they match.
PDBj maintains the single global PDB/BMRB/EMDB archives of macromolecular structures and provides integrated tools for searching and analyzing PDB data.
The PlaBi database covers crop plants and Arabidopsis, including sequence data for protein-coding genes.
The Worldwide Protein Data Bank manages the public archive of 3D structures for proteins, nucleic acids, and complex assemblies.
The SWISS-MODEL Repository contains annotated 3D protein structure models generated by a homology-modelling pipeline.
The Human Protein Atlas organizes protein information across tissues, brain, cells, blood, disease, structure, and interaction resources.
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