Topology Data Bank of Transmembrane Proteins
Topology, Structure and Prediction.

Database status

Database release: v3.3
Release date: 2025-01-12
Entries: 9588
Topology data: 685414
Alpha helical proteins: 9310
Beta barrel proteins: 279
PubMed links: 43320
PDB links: 31246
Visitors: 1005518

TOPDB statistics of release v3.3

Counts by experimental types

Experimental type # Entries # Topology data
Fusion 1210 4735
PostTransMod 1523 6364
Protease 99 339
Immunolocalisation 177 569
Chemical_modification 232 1845
Structure 7609 671029
Other 361 533
Total 9588 685414

Number of proteins by structural types

Structural type # Entries
Alpha Bitopic 3781
Alpha Polytopic 5529
Beta Polytopic 279
Total 9589

Number of cross references

Database # References
PDB 31246
Pubmed 43320
UniProt 6345

Distribution of transmembrane segment's number

Distribution of evidence types