rrnDB - the Ribosomal RNA Operon Copy Number Database (original) (raw)

Genome of E. coli with ribosomal RNA and tRNA genes highlighted--courtesy g-language.org

Last update:

_rrn_DB
version 5.10

June 06, 2025

(see About _rrn_DB Versions for changes)

A searchable database documenting variation in ribosomal RNA operons (rrn) in Bacteria and Archaea. Find information such as the 16S gene copy number of an organism by looking up its name under the NCBI or RDP taxonomy or by full-text search of _rrn_DB's records.

Please cite the use of _rrn_DB in the following way:

Stoddard S.F, Smith B.J., Hein R., Roller B.R.K. and Schmidt T.M. (2015) _rrn_DB: improved tools for interpreting rRNA gene abundance in bacteria and archaea and a new foundation for future development. Nucleic Acids Research 2014; doi: 10.1093/nar/gku1201 [PMID:25414355]

This article is freely available as abstract and full text [HTML] [PDF].

Data and code from Nature Microbiology “Exploiting rRNA operon copy number to investigate bacterial reproductive strategies” is available here: [download link]

Curated by the Schmidt Laboratoryat the University of Michigan.

Explore the database
Estimate the number of rrn operons
Learn more about _rrn_DB
Cite the _rrn_DB's NAR article

The current _rrn_DB version (5.10) includes 48,077 Bacterial records representing 12,138 species, and 623 Archaeal records representing 490 species.