Data collection: COGs

WARNING: this data collection has been deprecated!
As of September 2013, this collection is no longer maintained. Various archives are available at:
We recommend the usage of the following data collection instead: Conserved Domain Database.

protein clustering genome

General information

Recommended name COGs
Alternative name(s)
  • Clusters of Orthologous Groups
Description Clusters of Orthologous Groups of proteins (COGs) were delineated by comparing protein sequences encoded in complete genomes, representing major phylogenetic lineages. Each COG consists of individual proteins or groups of paralogs from at least 3 lineages and thus corresponds to an ancient conserved domain.
Identifier pattern^COG\d+$
Registry identifierMIR:00000296

Identification schemes

Namespace cogs
Compact Identifier cogs:{accession number}
Alternative URI schemes  

Physical locations (resources)

Description COGs at NCBI
Access URLs HTML   (using the example identifier: COG0001)
Institution National Center for Biotechnology Information (NCBI), USA