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The IDB and IEDB: intron sequence and evolution databases.
1Department of Biology, Indiana University, Bloomington, IN 47402, USA.
Nucleic Acids Research
|December 11, 1999
Summary
The Intron DataBase (IDB) and Intron Evolution DataBase (IEDB) offer comprehensive genomic data on introns and exons. These databases provide insights into intron evolution and phylogenetic distribution across numerous species.
Area of Science:
- Genomics
- Bioinformatics
- Evolutionary Biology
Background:
- Nuclear pre-mRNA introns play crucial roles in gene regulation and evolution.
- Existing sequence databases lack comprehensive, integrated intron data.
- Understanding intron characteristics is vital for deciphering genomic complexity.
Purpose of the Study:
- To construct a non-redundant database (IDB) of nuclear, protein-encoding genomic DNA sequences, emphasizing introns.
- To develop a complementary database (IEDB) for statistical analysis of intron and exon sequences and their evolutionary patterns.
- To provide a resource for studying the phylogenetic distribution and evolution of introns.
Main Methods:
- Integrated data from SWISS-PROT and GenBank sequence databases.
- Developed the Intron DataBase (IDB) detailing intron, exon, and coding region features.
- Created the Intron Evolution DataBase (IEDB) for statistical analysis and evolutionary insights.
Main Results:
- IDB contains over 63,000 genes and 154,000 introns with detailed sequence and location information.
- IEDB summarizes data for over 2,800 species, including intron penetration, density, and distribution.
- Both databases are cross-referenced to SWISS-PROT and GenBank for enhanced usability.
Conclusions:
- IDB and IEDB serve as valuable, integrated resources for genomic research on introns.
- These databases facilitate the study of intron evolution and their phylogenetic significance.
- Regular updates and internet accessibility ensure the databases remain current and widely available.