KEGG Virus Resource
KEGG Virus is a resource toward integrating viruses and cellular organisms from an evolutionary perspective. Viruses are part of the GENES, KO, GENOME, PATHWAY, NETWORK, DISEASE and DRUG databases, as summarized below.Virus genes
The virus (T40000) category of the KEGG GENES database is generated from the RefSeq database and given KO annotation. RefSeq GeneID's are used as gene identifiers and the organism code "vg" is used for the entire set of viral genes. For example, vg:3783681 is BALF5 (DNA polymerase catalytic subunit) gene of human herpesvirus 4 (Epstein-Barr virus) with KO annotation of K18964.
Virus taxonomy
All the viruses present in KEGG GENES are classified by the KEGG-original classification system integrating the ICTV (International Committee on Taxonomy of Viruses) classification and Baltimore classification using the NCBI taxonomy identifier.
The correspondence between the ICTV realm, kingdom, phylum, class, order, family classification and the seven types of Baltimore classification is shown on the right.
Virus KOs
Some KOs in KEGG organisms are shared by viruses, but there are many unique KOs that are found only in viruses. Based on experimental evidence, virus-specific KOs are defined especially for those viral proteins that are relevant in human diseases.
Riboviria Pararnavirae Artverviricota Revtraviricetes Blubervirales (VII dsDNA-RT) Ortervirales Caulimoviridae (VII dsDNA-RT) Metaviridae (VI ssRNA-RT) Retroviridae (VI ssRNA-RT) Orthornavirae Duplornaviricota (III dsRNA) Pisuviricota Duplopiviricetes (III dsRNA) Pisoniviricetes (IV +ssRNA) Stelpaviricetes (IV +ssRNA) Kitrinoviricota (IV +ssRNA) Lenarviricota (IV +ssRNA) Negarnaviricota (V -ssRNA) Duplodnaviria (I dsDNA) Varidnaviria (I dsDNA) Monodnaviria Shotokuvirae Cossaviricota Papovaviricetes (I dsDNA) Mouviricetes (II ssDNA) Quintoviricetes (II ssDNA) Cressdnaviricota (II ssDNA) Loebvirae (II ssDNA) Sangervirae (II ssDNA) Trapavirae (II ssDNA)
Virus genomes
Selected viruses are given T4 identifiers and are part of the KEGG GENOME database. Note that each T4 entry is a collection of virus genomes with the same taxonomy ID. Note also that T40000 is not part of KEGG GENOME; it simply represents the virus category of KEGG GENES.
The selected viruses have relevance to human diseases or plant diseases. T4 entries for human-disease causing viruses are linked from KEGG DISEASE and KEGG BRITE, while those for plant-disease causing viruses appear in KEGG BRITE.
Diseases and pathways
Disease pathways
- Infectious diseases: Viral
- Human T-cell leukemia virus 1 infection
Human immunodeficiency virus 1 infection
Measles
Influenza A
Hepatitis B
Hepatitis C
Herpes simplex virus 1 infection
Human cytomegalovirus infection
Kaposi sarcoma-associated herpesvirus infection
Epstein-Barr virus infection
Human papillomavirus infection
- Cancers: Overview
- Viral carcinogenesis
- Cardiovascular diseases
- Viral myocarditis
- Antiinfectives - Antivirals
- Antiviral agents, Anti-HIV agents (KEGG DRUG structure maps)
Last updated: August 13, 2020