Nucleic Acids Research Advance Access published online on November 4, 2008
Nucleic Acids Research, doi:10.1093/nar/gkn845
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Database Issue |
CDD: specific functional annotation with the Conserved Domain Database
National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health, Bldg. 38 A, Room 8N805, 8600 Rockville Pike, Bethesda, MD 20894, USA
*To whom correspondence should be addressed. Tel: +1 301 435 4919; Fax: +1 301 435 7793; Email: bauer{at}ncbi.nlm.nih.gov
Received September 16, 2008. Revised October 14, 2008. Accepted October 15, 2008.
NCBI's Conserved Domain Database (CDD) is a collection of multiple sequence alignments and derived database search models, which represent protein domains conserved in molecular evolution. The collection can be accessed at http://www.ncbi.nlm.nih.gov/Structure/cdd/cdd.shtml, and is also part of NCBI's Entrez query and retrieval system, cross-linked to numerous other resources. CDD provides annotation of domain footprints and conserved functional sites on protein sequences. Precalculated domain annotation can be retrieved for protein sequences tracked in NCBI's Entrez system, and CDD's collection of models can be queried with novel protein sequences via the CD-Search service at http://www.ncbi.nlm.nih.gov/Structure/cdd/wrpsb.cgi. Starting with the latest version of CDD, v2.14, information from redundant and homologous domain models is summarized at a superfamily level, and domain annotation on proteins is flagged as either specific (identifying molecular function with high confidence) or as non-specific (identifying superfamily membership only).
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