ADDA is a global clustering of protein sequences into protein domains and protein domain families. The database currently contains domains for 1.5 Mio sequences from UniProt, ENSEMBL, and other sequence databases. The domains are grouped into 123,000 families of which 40,000 have more than five members. The database is built in an entirely automated fashion and is updated regularly. The data is available for download and for querying via the WWW.
protein sequence protein domains and classification