KEGG Orthology (KO) Reference Dataset — ko

A comprehensive reference dataset mapping KEGG Orthology (KO) identifiers to their pathway classifications and descriptions. Each KO entry can appear in multiple rows if it belongs to multiple pathways.

Usage

data("ko_reference")

Format

A data frame with 58693 observations and the following columns:

id: Character. KO identifier (e.g., "K00001")
PathwayL1: Character. Top-level KEGG pathway category (e.g., "Metabolism")
PathwayL2: Character. Second-level pathway category (e.g., "Carbohydrate metabolism")
Pathway: Character. Specific pathway name with ID (e.g., "Glycolysis / Gluconeogenesis [PATH:ko00010]")
description: Character. KO entry description with gene name and EC number

Source

KEGG REST API (https://rest.kegg.jp)

Examples

data("ko_reference")
head(ko_reference)

# Check pathway hierarchy
table(ko_reference$PathwayL1)