Number of references (2025/10/30)
| total | 76,301 |
| pathway | 6,814 |
| brite | 448 |
| module | 1,201 |
| ko | 29,697 |
| genome | 8,228 |
| agenes | 3,133 |
| glycan | 956 |
| reaction | 2,133 |
| enzyme | 16,313 |
| network | 2,862 |
| variant | 2,426 |
| disease | 11,674 |
KEGG Database
Data-oriented entry points
| Category | Entry point | Database | Data object | KEGG identifier* |
| Systems information |
PATHWAY | PATHWAY | KEGG pathway maps | map | ko, ec, rn, <org> |
| BRITE | BRITE | Brite hierarchies Brite tables |
br, jp, ko | <org> br, jp |
|
| MODULE RModule |
MODULE | Modules Reaction modules |
M | <org>_M RM |
|
| Genomic information |
KO | KO | KEGG Orthology (KO) for functional orthologs | K |
| GENES Virus SeqData |
GENES | KEGG organism genes and proteins Virus genes and proteins Virus mature peptides Functionally characterized proteins from literature |
<org>:<gene> vg:<gene> vp:<gene-no> ag:<protein> |
|
| GENOME | GENOME | KEGG organisms genomes KEGG viruses genomes |
T, gn:<org> gn:<vtax> |
|
| Chemical information |
COMPOUND | COMPOUND | Metabolites and other small molecules | C |
| GLYCAN | GLYCAN | Glycans | G | |
| REACTION | REACTION RCLASS |
Biochemical reactions Reaction class |
R RC |
|
| Enzyme | ENZYME | Enzyme nomenclature with sequence data | ec:<ecnum> | |
| Health information |
NETWORK | NETWORK VARIANT |
Network variation maps Network elements Human gene variants |
nt N hsa_var:<gene_vno> |
| DISEASE | DISEASE | Human diseases | H | |
| DRUG | DRUG DGROUP |
Drugs Drug groups |
D DG |
|
| MEDICUS | JAPIC | Japanese drug labels | N/A (outside databases) | |
| DailyMed | FDA drug labels (links only) |
* KEGG identifier = prefix followed by five digit-number or combination of dbname:entryname
Organism-specific entry points
KEGG Analysis tools
Data viewers
| Data object | Viewer | WebLinks form |
| All KEGG data objects | DBGET viewer | https://www.kegg.jp/entry/<kid> |
| Pathway maps | Pathway viewer | https://www.kegg.jp/pathway/<kid> |
| Brite hierarchies | Brite viewer | https://www.kegg.jp/brite/<kid> |
| KEGG modules | Module viewer | https://www.kegg.jp/module/<kid> |
| Genomes | Genome browser | https://www.kegg.jp/genome/<kid> |
| Network variation maps | Network viewer | https://www.kegg.jp/network/<kid> |
Analysis Tools
| Tool | Feature |
| KEGG Mapper | KEGG mapping tools including Reconstruct, Search, Color, Join and MWsearch |
| KEGG Web Apps | Pathway viewer, Brite viewer and Genome browser with mapping capabilities |
| KEGG Syntax | Taxonomy mapping, Genome alignment and Synteny analysis tools |
| KEGG Annotation | Ortholog table and KO assignment tools |
| BlastKOALA GhostKOALA |
Automatic KO assignment |
| BLAST FASTA |
Sequence similarity search (served by GenomeNet) |
| SIMCOMP SUBCOMP |
Chemical structure similarity search (served by GenomeNet) |
See more tools at GenomeNet.
Documents
| Document |
| KEGG database entry format |
| KEGG Weblinks |
| Map coloring GUI |
| Map coloring URL |
| KEGG API manual |
| KEGG Markup Language (KGML) |
Last updated: April 1, 2025