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UniProt is the universal protein database, a central repository of protein data created by combining Swiss-Prot, TrEMBL and PIR. This makes it the world's most comprehensive resource on protein information.

The UniProt ConsortiumEdit

The UniProt Consortium comprises the European Bioinformatics Institute (EBI), the Swiss Institute of Bioinformatics (SIB), and the Protein Information Resource (PIR). EBI, located at the Wellcome Trust Genome Campus in Hinxton, UK, hosts a large resource of bioinformatics databases and services. SIB, located in Geneva, Switzerland, maintains the ExPASy (Expert Protein Analysis System) servers that are a central resource for proteomics tools and databases. PIR, hosted by the National Biomedical Research Foundation (NBRF) at the Georgetown University Medical Center in Washington, DC, USA, is heir to the oldest protein sequence database, Margaret Dayhoff's Atlas of Protein Sequence and Structure. In 2002, EBI, SIB, and PIR joined forces as the UniProt Consortium.

The Roots of UniProt DatabasesEdit

Each consortium member is heavily involved in protein database maintenance and annotation. Until recently, EBI and SIB together produced Swiss-Prot and TrEMBL, while PIR produced the Protein Sequence Database (PIR-PSD). These databases coexisted with differing protein sequence coverage and annotation priorities. Swiss-Prot is recognized as the gold standard of protein annotation, with extensive cross-references, literature citations, and computational analyses provided by expert curators. Recognizing that sequence data were being generated at a pace exceeding Swiss-Prot's ability to keep up, TrEMBL (Translated EMBL Nucleotide Sequence Data Library) was created to provide automated annotations for those proteins not in Swiss-Prot. Meanwhile, PIR maintained the PIR-PSD and related databases, including iProClass, a database of protein sequences and curated families. The consortium members — all dedicated to the same goal of providing expansive and meaningful protein annotation, and all with solid foundations stemming from decades of activity — decided to pool their overlapping (and, importantly, their complementary) resources, efforts, and expertise. The UniProt databases build upon these solid foundations.

Organization of UniProt DatabasesEdit

The UniProt databases consist of three database layers:

  • The UniProt Archive (UniParc) provides a stable, comprehensive sequence collection without redundant sequences by storing the complete body of publicly available protein sequence data.
  • The UniProt Knowledgebase (UniProtKB) is the central database of protein sequences with accurate, consistent, and rich sequence and functional annotation.
  • The UniProt Reference Clusters (UniRef) databases provide non-redundant reference data collections based on the UniProt knowledgebase in order to obtain complete coverage of sequence space at several resolutions.

Funding for UniProtEdit

UniProt is mainly supported by the National Institutes of Health (NIH) grant 1 U01 HG02712-01. Minor support for the EBI's involvement in UniProt comes from the two European Union contracts BioBabel (QLRT-2000-00981) and TEMBLOR (QLRI-2001-00015) and from the NIH grant 1R01HGO2273-01.

External referencesEdit

Databases supported by Bioinformatic Harvester
UniProt | SOURCE | SMART | SOSUI | PSORT | HomoloGene | GFP-cDNA | IPI | OMIM
NCBI-BLAST | Genome-Browser | Ensembl | RZPD | STRING | iHOP | Entrez


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