Cited by 7,850Protein Structure and DynamicsEnzyme Structure and FunctionMachine Learning in Bioinformatics

The DOI matches its Crossref record; 22 of the 24 references it cites were found in a registry or an index; 1 of the 24 sources its claims cite were checked for support.

AlphaFold Protein Structure Database: massively expanding the structural coverage of protein-sequence space with high-accuracy models

Open access

Abstract

The AlphaFold Protein Structure Database (AlphaFold DB, https://alphafold.ebi.ac.uk) is an openly accessible, extensive database of high-accuracy protein-structure predictions. Powered by AlphaFold v2.0 of DeepMind, it has enabled an unprecedented expansion of the structural coverage of the known protein-sequence space. AlphaFold DB provides programmatic access to and interactive visualization of predicted atomic coordinates, per-residue and pairwise model-confidence estimates and predicted aligned errors. The initial release of AlphaFold DB contains over 360,000 predicted structures across 21 model-organism proteomes, which will soon be expanded to cover most of the (over 100 million) representative sequences from the UniRef90 data set.

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

AlphaFold DB is an openly accessible database of high-accuracy protein-structure predictions generated by AlphaFold v2.0, initially containing over 360,000 predicted structures across 21 model-organism proteomes. It provides atomic coordinates, per-residue pLDDT confidence, and pairwise predicted aligned errors through FTP, API, and interactive web pages, with planned expansion to >100 million UniRef90 representative sequences.

Key findings

  • The initial release contains over 360,000 predicted structures across 21 model-organism proteomes, including 23,391 human, 55,799 soybean, 43,649 Asian rice, 39,299 maize, 27,434 Arabidopsis, 24,664 zebrafish, 21,615 mouse, and 21,272 rat structures.
  • Predictions include atomic coordinates, per-residue confidence pLDDT on a 0–100 scale, and pairwise Predicted Aligned Error (PAE) in Ångströms capped at 31.75 Å; pLDDT bands are ≥90 very high, 90 > pLDDT ≥ 70 confident, 70 > pLDDT ≥ 50 low, and <50 very low.
  • Data are available via bulk FTP downloads, a public API keyed on UniProt accessions, and protein-specific web pages with interactive visualization using Mol*; metadata are indexed with Apache Solr.
  • Planned expansions aim to exceed 1 million structures, including SwissProt and neglected-disease proteomes, followed by >100 million structures for most UniRef90 representative sequences.

Methods

  • Database/resource paper describing AlphaFold DB, created by DeepMind and EMBL-EBI, using AlphaFold v2.0 predictions.
  • Initial version predicted most sequences in UniProt reference proteomes for 21 organisms in the 16–2700 amino-acid length range, plus 1400-residue fragments for longer human proteins; sequences with non-standard amino acids were excluded, and multiple isoforms were not provided.
  • Data archival includes PDB and mmCIF coordinate files, PAE JSON files, and metadata JSON files; access is through FTP, API, and web pages, with confidence metrics stored in B-factor fields and used for coloring in the 3D viewer.

Limitations

  • Stated: the initial release excludes isoforms and sequences with unknown or non-standard amino acids, and predictions are limited to 16–2700 amino acids, with 1400-residue fragments for longer human proteins.
  • Stated: PAE is asymmetric and capped at 31.75 Å; high PAE values indicate unreliable relative domain positions/orientations, and pLDDT reflects local confidence rather than global accuracy.
  • Evident: this is a database/resource description, not an experimental validation study; initial coverage is limited to 21 proteomes, and the paper does not report new accuracy benchmarks beyond citing AlphaFold/CASP14 and prior human-proteome analyses.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1093/nar/gkab1061

Cites

22 of 22 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Figures

Figure 1. Searching AlphaFold DB. AlphaFold DB provides a search engine to find proteins of interest based on gene or protein name, UniProt accession or organism name. The search results can be filtered if required and clicking on a protein name leads to the relevant protein-specific entry page.
Figure 1. Searching AlphaFold DB. AlphaFold DB provides a search engine to find proteins of interest based on gene or protein name, UniProt accession or organism name. The search results can be filtered if required and clicking on a protein name leads to the relevant protein-specific entry page.CC BY · PubMed Central
Figure 2. Meta-information and 3D visualization of the AlphaFold structure predictions. The protein-specific web pages display essential metadata for the protein of interest, such as known biological functions and cross-references to UniProt and PDBe-KB. Users can download the predicted models in PDB and mmCIF format, and an interactive molecular viewer visualizes the structure, coloured by the per-residue pLDDT confidence measure.
Figure 2. Meta-information and 3D visualization of the AlphaFold structure predictions. The protein-specific web pages display essential metadata for the protein of interest, such as known biological functions and cross-references to UniProt and PDBe-KB. Users can download the predicted models in PDB and mmCIF format, and an interactive molecular viewer visualizes the structure, coloured by the per-residue pLDDT confidence measure.CC BY · PubMed Central
Figure 3. Visualization of Predicted Aligned Errors. Protein-specific pages contain an interactive 2D plot of the PAE values. This tool interacts with the 3D molecular viewer to facilitate the identification of domains whose relative positions and orientations AlphaFold predicts with confidence. In this example (https://alphafold.ebi.ac.uk/entry/Q93074), AlphaFold has high confidence in the relative position of domains at residues 1–500 (green) and residues 1200–1700 (blue), but not with the region between 500–1200 (orange) nor the C-terminus.
Figure 3. Visualization of Predicted Aligned Errors. Protein-specific pages contain an interactive 2D plot of the PAE values. This tool interacts with the 3D molecular viewer to facilitate the identification of domains whose relative positions and orientations AlphaFold predicts with confidence. In this example (https://alphafold.ebi.ac.uk/entry/Q93074), AlphaFold has high confidence in the relative position of domains at residues 1–500 (green) and residues 1200–1700 (blue), but not with the region between 500–1200 (orange) nor the C-terminus.CC BY · PubMed Central

Verification

Claims the paper makes

15 No basis given · 12 Not checked yet · 5 Own interpretation · 2 Own result · 1 Partly supported · accuracy not yet measured

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Metadata

Authors
Varadi, M., Anyango, S., Deshpande, M., Nair, S., Natassia, C., Yordanova, G., Yuan, D., Stroe, O., Wood, G., Laydon, A., Žídek, A., Green, T., Tunyasuvunakool, K., Petersen, S., Jumper, J., Clancy, E., Green, R., Vora, A., Lutfi, M., Figurnov, M., Cowie, A., Hobbs, N., Kohli, P., Kleywegt, G., Birney, E., Hassabis, D., & Velankar, S.
Affiliations
  • European Molecular Biology Laboratory, European Bioinformatics Institute, Hinxton, UK
  • European Bioinformatics Institute (GB)
  • Google DeepMind (United Kingdom) (GB)
Corresponding author
  • Hassabis, Demis
  • Velankar, Sameer
Venue
Nucleic Acids Research
Published
2021-11-17
Volume
50
Issue
D1
Pages
D439-D444
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W3211795435
Cited by
7,850
References
24
Citations by year
2026: 1070 · 2025: 1540 · 2024: 2150 · 2023: 2142 · 2022: 925 · 2021: 13
FWCI
416.00
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
DeepMind
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Structural Biology › Enzyme Structure and Function
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Machine Learning in Bioinformatics
Keywords
AlphaFold, protein structure prediction, protein sequence space, structural coverage, model confidence, atomic coordinates, proteome, DeepMind
MeSH terms
Protein Conformation, alpha-Helical, Protein Conformation, beta-Strand, Amino Acid Sequence, Animals, Bacteria, Dictyostelium, Fungi, Humans, Models, Molecular, Plants, Proteins, Software, Trypanosoma cruzi, Protein Folding, Internet, Databases, Protein, Datasets as Topic

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