PRDB is a tool for large-scale analysis of protein tandem repeats. It includes tandem repeats detected by T-REKS program and is maintained by CRBM-CNRS, Montpellier.

PRDB allows selection criteria based upon type of the sequence database (PDB, SwissProt, NR), taxonomic group, organism, number of repeats in tandem arrays, repeat length, length of protein sequence, length of tandem repeat region, structure-forming potential (TOP-IDP index), level of repeat perfection (Psim) and other parameters. The results are visualized in lists, for which various sorting options and tools of analysis are available (see details).

PRDB is designed for scientists interested in the structure, function and evolution of proteins with tandem repeats.