CpGDB

CpGDB provides a relational database of complete chloroplast genome sequences, individual gene sequences, and detailed feature records for spermatophytes to support comparative, evolutionary, and functional chloroplast genomics.

Key Features:

• Relational database: Implements chloroplast genomic data and feature records in a relational database.
• Sequence content: Stores complete chloroplast genome sequences and individual gene sequences for spermatophyte species.
• Taxonomic coverage: Contains data from 3,823 plant species across 1,527 genera and 256 families.
• Data source and updates: Incorporates new sequences available at NCBI through regular updates.
• GenBank feature extraction: Performs data mining to extract feature records directly from GenBank files.
• Uniform gene nomenclature: Employs a uniform nomenclature for the majority of gene entries.
• Intron/exon feature records: Provides enriched intron and exon feature annotations for genes.
• Comparative genomics capability: Enables comparison of gene length and gene location among plant species within and across families.

Scientific Applications:

• Comparative genomics: Supports comparison of gene length and positional variation across spermatophyte species and families.
• Evolutionary biology and phylogenetics: Provides curated chloroplast sequences and feature records for evolutionary and phylogenetic analyses.
• Systematics: Facilitates systematics research using standardized chloroplast gene data across taxa.
• Functional genomics: Enables investigations of gene structure and splicing through enriched intron/exon annotations.
• Gene annotation and nomenclature standardization: Supports consistent gene annotation and nomenclature across chloroplast genomes.

Methodology:

Feature records are extracted from GenBank files by data mining, stored in a relational database, assigned a uniform gene nomenclature for most entries, and enriched with intron/exon feature records while incorporating new sequences from NCBI updates.