ArrayExpress

ArrayExpress hosts a public repository at the European Bioinformatics Institute (EBI) for sequencing- and array-based functional genomics datasets to enable data sharing, reproducibility, and downstream analyses.

Key Features:

• Data Submission and Integration: Accepts direct submissions and imports datasets from NCBI Gene Expression Omnibus (GEO) to aggregate functional genomics data.
• Supported Technologies: Contains datasets generated by sequencing and array-based (microarray) technologies.
• Advanced Query Capabilities: Provides ontology-enabled querying by technology type and sample attributes including disease state, cell type, and anatomical origin.
• Integration with Other Databases: Links to EBI resources such as the Gene Expression Atlas and sequence databases for cross-referencing.

Scientific Applications:

• Gene Expression Studies: Analyzing gene expression patterns across different conditions, tissues, or developmental stages.
• Comparative Genomics: Comparing genomic or transcriptomic datasets across species or strains to assess evolutionary relationships and functional conservation.
• Disease Research: Investigating differential gene expression between diseased and healthy samples to study genetic underpinnings of disease.
• Systems Biology: Integrating multi-dimensional datasets to model complex biological systems and networks.

Methodology:

Submitted datasets undergo data curation and standardization, quality control checks, and metadata curation using controlled vocabularies and ontologies.