Search tool

The Search tool searches various KEGG objects, including genes, KOs, EC numbers, metabolites and drugs, against KEGG pathway maps and other network entities. Found objects are marked in red.

Search mode:   Reference   hsa   other org  

Enter query KEGG identifiers

Or upload file:

Filter1   Filter2   (to extract K/C/G/D/R/RC numbers)

Include "same as" objects

Include aliases (for hsa and other org modes)


hsa mode
   diseasegene.txt (human disese genes)
   drugtarget.txt (drug targets)
   drugtarget2.txt (drug targets, products only)
   mabtarget.txt (drug targets, MAB only)
   mabtarget2.txt (drug targets, MAB products only)


Query data format
KEGG identifiers separated by whitespace characters (space, tab, newline)
Search mode
Search mode Target DB Prefix Type KEGG identifier Alias
Reference Pathway map Reference pathway K/R/EC number
C/G/D/H number
org code
Brite ko, br Reference hierarchy
br Reference table
Module M Reference module
hsa Pathway hsa Human-specific pathway hsa gene ID
C/G/D number
hsa_var ID
K/EC number
Brite hierarchy hsa Human-specific hierarchy
Module hsa_M Human-specific module
Network nt Network variation map
Disease H Human disease entries
other org Pathway <org> Organism-specific pathway gene ID
C/G/D number
K/EC number
Brite hierarchy <org> Organism-specific hierarchy
Module <org>_M Organism-specific module
Use of gene symbols
The use of gene symbols (in the Gene name field of GENES entry) as aliases is no longer supported, because many-to-many relationships may result in erroneous links to KEGG identifiers.

As an exception, the official symbols for hsa (Homo sapiens) can be used as primary identifiers, which are automatically converted to KEGG identifiers by using the one-to-one correspondence between NCBI Gene IDs and HGNC symbols. Note, however, that the correspondence is updated every three months of RefSeq releases. It is highly recommended to always use KEGG hsa gene identifiers.

Last updated: July 12, 2021