The InterPro database integrates together predictive models or 'signatures' representing protein domains, families and functional sites from multiple, diverse source databases: Gene3D, PANTHER, Pfam, PIRSF, PRINTS, ProDom, PROSITE, SMART, SUPERFAMILY and TIGRFAMs. Integration is performed manually and approximately half of the total approximately 58,000 signatures available in the source databases belong to an InterPro entry.
Following collected information from different databases can be obtained at Interpro:

• Protein families
• Domains
• Repeats
• Sites in which identifiable features can be applied to query protein