Comparative plant genomics resources at PlantGDB.

Area of Science:

• Plant genomics
• Bioinformatics
• Molecular biology

Background:

• PlantGDB serves as a centralized repository for plant molecular sequence data.
• Accurate gene identification and annotation are crucial for understanding plant biology.

Purpose of the Study:

• To present the PlantGDB database, detailing its data content and integrated bioinformatic tools.
• To describe the methods used for assembling and annotating plant sequences, including ESTs and genome survey sequences.

Main Methods:

• Assembly of expressed sequence tags (ESTs) into contigs representing tentative unique genes.
• Functional annotation of EST contigs using protein similarity and Gene Ontology (GO) terms.
• Assembly of genome survey sequences and identification of putative full-length genes.
• Annotation of exon-intron boundaries for Arabidopsis and rice using spliced alignments.
• Development of dedicated genome browsers (AtGDB, OsGDB) for data visualization.

Main Results:

• PlantGDB provides assembled EST contigs and genome survey sequence contigs with functional annotations.
• Gene structures, including exon-intron boundaries, are annotated for Arabidopsis and rice.
• Integrated bioinformatic tools allow on-site sequence analysis.
• Dedicated genome browsers offer visualization of transcript models and supporting evidence.

Conclusions:

• PlantGDB is a valuable resource for plant molecular sequence data and analysis.
• The database facilitates gene discovery, functional annotation, and comparative genomics in plants.
• Integrated tools and browsers enhance usability for plant researchers.