A Structural View of Biology
This resource is powered by the Protein Data Bank archive-information about the 3D shapes of proteins, nucleic acids, and complex assemblies that helps students and researchers understand all aspects of biomedicine and agriculture, from protein synthesis to health and disease.
The RCSB PDB builds upon the data by creating tools and resources for research and education in molecular biology, structural biology, computational biology, and beyond.
Deposition Preparation Tools
- pdb_extract: Extract and harvest data in PDBx/mmCIF format from structure determination programs
- SF-Tool: Convert structure factor files among various formats
- Ligand Expo: Search the Chemical Component Dictionary for the IDs of released ligands
Data Format Conversion
Validation reports contain an assessment of the quality of a structure and highlight specific concerns by considering the coordinates of the model, the experimental data and the fit between the two. Easily interpretable summary information that compares the quality of a model with that of other models in the archive will help users of PDB data to critically assess archived entries and to select the most appropriate structural models for their needs. These reports are developed using the recommendations of thewwPDB Validation Task Forces.
Reports for released entries are available from Structure Summary pages.
Validation reports for manuscript reviewers are created during annotation of deposited structures.
Information and example Validation Reports (at wwpdb.org).
Check your X-ray, NMR, or EM structures before depositing (standalone server).
Have non-atomic coordinates, multi-scale structures obtained through integrative/hybrid (I/H) methods? Deposit at PDB-Dev which is a prototype deposition and archiving system for structural models obtained through integrative/hybrid (I/H) methods.
Questions about your deposition?
From any page on the site, a Basic Search can be run by entering a search term in the top Search Bar.
As you enter a term, you will see suggestions appearing in the dropdown menu that appears below the search bar. The suggestions are grouped by attribute name, indicating in the specific field or fields in which the search term was found.You can click on an item in the dropdown menu to see results matching only that particular attribute, or click the
The Advanced Search Query Builder tool allows you to construct complex boolean queries by specifying values for a wide range of structure attributes.
Text-based queries can be combined with sequence and structure similarity searches.
Search results can be returned at the structure, entity, or assembly level, and viewed in a variety of formats, for example, as a summary view, an images only gallery view, or in a Tabular Report format.
Any query and its results can be further refined by selecting additional criteria from the 'Refinements' panel.
Search by Sequences
Search protein and nucleic acid sequences using the mmseqs2 method to find similar protein or nucleic acid chains in the PDB.
The new Advanced Search Query Builder tool can be used to run sequence searches, and to combine the results with the other search criteria that are available.
Search by Unreleased & Access New Entries
The PDB archive is updated weekly in two phases
Phase I: Every Saturday by 3:00 UTC, for every new entry, wwPDB website provides sequence(s) (amino acid or nucleotide) for each distinct polymer and, where appropriate, the InChI string(s) for each distinct ligand and the crystallization pH value(s).
Phase II: Every Wednesday by 00:00 UTC, all new and modified data entries will be updated at each of the wwPDB FTP sites.
Next data entry update in:
Browse by Annotation
PDB entries have been annotated by various ontologies and hierarchical classification schemes.
- Anatomical Therapeutic Chemical Classification System
- Biological Process
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- Enzyme Classification
- Genome Location
- Membrane Protein
- MeSH (Medical Subject Headings)
- Molecular Function
- Protein Symmetry
- Source Organism
Explore the PDB Archive
Search by Ligands
Search ligands bound to macromolecules in the PDB by:
- Identifier or Name
- SMILES String, InChI or InChI Key
- Chemical Formula or Molecular Weight
- Chemical Substructure or Similarity
Search by Drugs & Drug Targets
Drugs & Drug Targets in the PDB have been mapped to DrugBank.
Drug-Target Complex: Atorvastatin bound to its target HMG-CoA reductase
Drug: Atorvastatin (Lipitor)
3D Structure Viewers
View PDB structures in 3D using NGL from any entry's Structure Summary page.A 3D View (NGL) User Guide is available.
Explore metabolic pathways maps that identify pathway components with PDB structures and homology models.
Protein Feature View
Provides a graphical summary of a full-length protein sequence from UniProt and how it corresponds to PDB entries. It also loads annotations from external databases (such as Pfam) and homology models information from the Protein Model Portal. Annotations visualizing predicted regions of protein disorder and hydrophobic regions are displayed.
Learn more about Protein Feature View.
This feature is available from the Molecular Description widget on Structure Summary pages and by entering a UniProt ID below.
Human Gene View
Illustrates the correspondences between the human genome and 3D structure. All human genes have been mapped to representative PDB structure protein chains (selected from sequence clusters at 40% sequence identity) to show which regions of a gene are available in PDB coordinates.
Learn more about Gene View.
Sequence & Structure Alignment
RCSB PDB's Comparison Tool calculates pairwise sequence (blast2seq, Needleman-Wunsch, and Smith-Waterman) and structure alignments (FATCAT, CE, TopMatch).
Comparisons can be made for any protein in the PDB archive and for customized or local files not in the PDB. Special features include support for both rigid-body and flexible alignments and detection of circular permutations.
The JSmol symmetry display mode (select the Symmetry button) highlights global, local, and helical symmetry among subunits. The view displays the symmetry axes, a polyhedron that reflects the symmetry, and a color scheme that emphasizes the symmetry.
Structure Summary pages provide access to information about structure quality.
The slider graphic compares important global quality indicators for a given structure with the PDB archive. Global percentile ranks (black vertical boxes) are calculated with respect to all X-ray structures available prior to 2011. Resolution-specific percentile ranks (white vertical boxes) are calculated considering entries with similar resolution.
This graphic is from the wwPDB Validation Report , which provides a more detailed assessment of the quality of a structure and highlights specific concerns. These reports were created using the recommendations of wwPDB Validation Task Forces.The full wwPDB Validation Report PDF is available for download. PDFs of Ramachandran plots (created by MolProbity) are provided to offer an independent method to evaluate the conformational quality of protein structures.
Map Genomic Position to Protein
Mutations in a gene can have profound effects on the function of a protein. This analysis tool highlights the location of a gene location (i.e., the site of a SNP).
Example of SNP in Breast Cancer 1 Gene
A TGT-to-GGT transversion in codon 64 of the BRCA1 gene leads to substitution of glycine for cysteine. This SNP is located on chromosome 17 at genomic coordinate: 43,106,478. The new mapping tool can be used to locate this position on the UniProt sequence and 3D structure.Access the Mapping Tool
EPPIC Biological Assemblies
EPPIC (Evolutionary Protein-Protein Interface Classifier) provides value-added information about biological assemblies in the PDB. This web server classifies interfaces present in protein crystals to distinguish biological interfaces from crystal contacts. EPPIC Version 3 enumerates all possible symmetric assemblies with a prediction of the most likely assembly based on probabilistic scores from pairwise evolutionary scoring.
Download: Coordinates & Experimental Data
Enter PDB IDs separated by comma or white space. Note: The Download Tool is launched as a stand-alone application using the Java Web Start protocol. More Download Help
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Searches and reports performed on this RCSB PDB website utilize data from the PDB archive. The PDB archive is maintained by the wwPDB at at FTP archive, ftp.wwpdb.org (data download details) and Versioned FTP, ftp-versioned.wwpdb.org (Versioning details).
- The directory pub/pdb is the entry directory for the ftp site.
- The directory pub/pdb/data/structures/divided contains the current PDB contents including PDB, mmCIF, and PDBML/XML formatted coordinate files, structure factors and NMR restraints
Annual snapshots of PDB Archive are available. Read More on FTP Services
PDB structure files, chemical component files, and several other files are available for download via http/https. These URLs are useful in scripted downloads using utilities such as wget.
- PDB Structure Files
- Ligand Files
- Secondary Structure Files
- SIFTS Files
Programmatic access to individual structures and/or specific data items is provided through Web Service Application Program Interfaces (APIs).
New Web Service APIs are being developed; users should register with the RCSB PDB API electronic list for announcements.
Contact RCSB PDB with questions suggestions for specific services.More
SARS-CoV-2 u1S2q 1 Up RBD Spike Protein Trimer
Cryo-EM structure of mitochondrial calcium uniporter holocomplex in low Ca2+
Bacteriophage phiKZ gp163.1 PAAR repeat protein in complex with the C-terminal part of the T4 gp5 beta-helical...
Crystal structure of Ser/Thr kinase Pim1 in complex with 10-DEBC derivatives
Crystal structure of the c-Src SH3 domain H122R-Q128K mutant in complex with Ni(II) at pH 7.5 co-crystallized ...
Structure of the SARS-CoV-2 spike glycoprotein in complex with the S309 neutralizing antibody Fab fragment
SARS-CoV-2 rS2d Down State Spike Protein Trimer
SARS-CoV-2 u1S2q 2 RBD Up Spike Protein Trimer
Crystal structure of the ACVR1 (ALK2) kinase in complex with the compound M4K2118
P-glycoprotein mutant-Y303A and C952A-with BDE100
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Announcement: Legacy RCSB PDB APIs Will Be Discontinued November 2020Users should migrate to new and improved APIs. Please contact us with any questions.
June 1: Retirement of Protein Workshop and Ligand ExplorerThe 3D viewer Mol* has been updated to include features from these tools.
New APIs Replace REST ServicesREST.rcsb.org services will be deprecated on May 14, 2020.
Welcome to the Next Generation RCSB.orgExplore significantly revised and updated tools for searching and exploring PDB data
COVID-19/SARS-CoV-2 ResourcesPDB data and related resources provide a starting point for structure-guided drug discovery and understanding of COVID-19
Improve Your Coordinates, Keep Your ID (Phase II)PDB versioning, which enables depositors to update entries while retaining their original PDB ID, is now available for all structures.
NMR data distribution in a unified format at the PDBStarting in March, OneDep will accept NMR experimental data as a single file in NMR-STAR or NEF format
Time-stamped Copies of PDB and EMDB ArchivesSnapshot as of January 1, 2020 are available.
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Enabling Structural Exploration of COVID-19; Beta test new features; Curated files for 3D printing; and more. Spring 2020 Issue