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rrndb: the Ribosomal RNA Operon Copy Number Database

Open access
Klappenbach, J. A.·2001·Nucleic Acids Research

Abstract

The Ribosomal RNA Operon Copy Number Database (rrndb) is an Internet-accessible database containing annotated information on rRNA operon copy number among prokaryotes. Gene redundancy is uncommon in prokaryotic genomes, yet the rRNA genes can vary from one to as many as 15 copies. Despite the widespread use of 16S rRNA gene sequences for identification of prokaryotes, information on the number and sequence of individual rRNA genes in a genome is not readily accessible. In an attempt to understand the evolutionary implications of rRNA operon redundancy, we have created a phylogenetically arranged report on rRNA gene copy number for a diverse collection of prokaryotic microorganisms. Each entry (organism) in the rrndb contains detailed information linked directly to external websites including the Ribosomal Database Project, GenBank, PubMed and several culture collections. Data contained in the rrndb will be valuable to researchers investigating microbial ecology and evolution using 16S rRNA gene sequences. The rrndb web site is directly accessible on the WWW at http://rrndb.cme. msu.edu.

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Metadata

Authors
Klappenbach, J. A.
Venue
Nucleic Acids Research
Published
2001-01-01
Volume
29
Issue
1
Pages
181-184
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2102555068
Cited by
1,081
References
1
FWCI
7.71
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: rrndb: the Ribosomal RNA Operon Copy Number Database. https://app.cochat.ai/papers/10.1093/nar/29.1.181
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Klappenbach, J. A. (2001). rrndb: the Ribosomal RNA Operon Copy Number Database. Nucleic Acids Research. https://doi.org/10.1093/nar/29.1.181

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