KEGG: Kyoto Encyclopedia of Genes and Genomes
KEGG is a database resource for understanding high-level functions and utilities of biological systems, such as cells, organisms, ecosystems and the biosphere from molecular-level information, especially large-scale molecular datasets generated by genome sequencing and other high-throughput experimental technologies.
See Release notes (July 1, 2026) for new and updated features.
See Release notes (July 1, 2026) for new and updated features.
Announcement: KEGG reorganized into 23 types of data objects
KEGG Database
- KEGG2
- KEGG Table of Contents [Update notes | Release history]
- PATHWAY
- KEGG pathway maps
- BRITE
- BRITE hierarchies and tables
- MODULE
- KEGG modules
- KO
- KO (KEGG Orthology) functional orthologs
- GENES
- Genes and proteins [KO statistics]
- GENOME
- Genomes with links to pathways [Virus]
- Organisms
- COMPOUND
- Metabolites and other chemical substances
- GLYCAN
- Glycans
- REACTION
- Biochemical reactions [RModule]
- ENZYME
- Enzyme nomenclature
- NETWORK
- Disease-related network variations
- DISEASE
- Human diseases
- DRUG
- Drugs [New drug approvals]
- MEDICUS
- Health information resource [Drug labels search]
Analysis Tools
- KEGG Mapper
- PATHWAY/BRITE/MODULE mapping tools
- KEGG Syntax
- Taxonomy-based analysis of conserved genes and gene sets
- BlastKOALA
- BLAST-based KO annotation and KEGG mapping
- GhostKOALA
- GHOSTX-based KO annotation and KEGG mapping
- BLAST/FASTA
- Sequence similarity search
- SIMCOMP
- Chemical structure similarity search