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Nucleic Acids Research, 2001, Vol. 29, No. 1 52-54
© 2001 Oxford University Press

iProClass: an integrated, comprehensive and annotated protein classification database

Cathy H. Wu*, Chunlin Xiao, Zhenglin Hou, Hongzhan Huang and Winona C. Barker

Protein Information Resource, National Biomedical Research Foundation, Georgetown University Medical Center, 3900 Reservoir Road, NW Washington, DC 20007-2195, USA

The iProClass database is an integrated resource that provides comprehensive family relationships and structural and functional features of proteins, with rich links to various databases. It is extended from ProClass, a protein family database that integrates PIR superfamilies and PROSITE motifs. The iProClass currently consists of more than 200 000 non-redundant PIR and SWISS-PROT proteins organized with more than 28 000 superfamilies, 2600 domains, 1300 motifs, 280 post-translational modification sites and links to more than 30 databases of protein families, structures, functions, genes, genomes, literature and taxonomy. Protein and family summary reports provide rich annotations, including membership information with length, taxonomy and keyword statistics, full family relationships, comprehensive enzyme and PDB cross-references and graphical feature display. The database facilitates classification-driven annotation for protein sequence databases and complete genomes, and supports structural and functional genomic research. The iProClass is implemented in Oracle 8i object-relational system and available for sequence search and report retrieval at http://pir.georgetown.edu/iproclass/ .

* To whom correspondence should be addressed. Tel: +1 202 687 2121; Fax: +1 202 687 1662; Email: wuc{at}nbrf.georgetown.edu


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