The European ribosomal RNA database
Quick phylogeny
secondary structure
variability maps

Welcome to the European ribosomal RNA database. This database compiles all complete or nearly complete SSU (small subunit) and LSU (large subunit) ribosomal RNA sequences. Sequences are provided in aligned format. The alignment takes into account the secondary structure information derived by comparative sequence analysis of thousands of sequences. Additional information such as literature references, taxonomy, secondary structure modles and nucleotide variability maps, is also available.

The database was founded in the research group of Professor De Wachter at the university of Antwerp (BELGIUM) in 1984. Since 2002, the database is maintained at the university of Gent (BELGIUM) in the research group of Professor Van de Peer.

The database is maintained by and .

Latest News:

Database no longer updated
Posted by on Tue Februari 12 2007

In order to strengthen Europe in the field of ribosomal RNA technology, a link to the SILVA databases is provided. These are comprehensive, quality checked, small- and large subunit ribosomal RNA databases which are regularly updated.

Database no longer updated
Posted by on Tue May 15 2007

This database was initiated more than 20 years ago in the research group of professor Rupert De Wachter. Over the years, this database has grown to a very large set of manually curated rRNA alignments. When building these alignments, both primary and secondary structure have been taken into account as much as possible. Currently, all people involved have moved to other projects so we will not be updating the database. However, since many people are still using this database as a source of rRNA alignments we do want to keep the database online in its present form.

Although we believe this database can still be very useful if you are interested in structure based rRNA alignements it should be noted that the sequences have not been updated. This can result in 3 main problems:

  1. The sequence you are interested in may not be found in the database even though it is present in Genbank.
  2. Recent evidence may suggest that the taxonomy assigned to a sequence needs to be updated. In this case the taxonomy of sequence will have been updated in Genbank but our database will still contain the old taxonomy information.
  3. Sometimes the sequences themselves are updated, again in this case the update will not be in our database.

Old server discontinued
Posted by on Wed May 28 2003

The old web server at the University of Antwerpen has now been discontinued. All traffic to that computer will be redirected here.

New feature: Quick phylogeny
Posted by on Fri Oct 25 2002

A new feature has just been added to the website: Quick phylogeny. You can find it in the left navigation bar. This program is an implementation of the bibi program by Guy Perrière and Gregory Devulder. The program uses BLAST and ClustalW to quickly build a preliminary alignment and phylogenetic tree of a query sequence and sequences in the database. It is by no means meant as a full featured phylogenetic analysis service, but it is a nice tool to quickly identify a sequence. So please only use it as such.

Databse URLs
Posted by on Fri Oct 4 2002

Since the URL of our website is a bit hard to remember ( you can also use This page will automatically forward you to the correct website.

Welcome to our new website
Posted by on Thu Sep 24 2002

The European ribosomal RNA database was founded at the University of Antwerp (BELGIUM) in 1983. As of this month the database will be maintained at the University of Ghent (also in BELGIUM). The old webserver in Antwerp will remain online at least until early 2003 but it will no longer be updated.

We are currently implementing a few new features which will (hopefully) greatly enhance the usability of this database. One new feature that is currently fully functional is a BLAST-able version of the database. Other features will be made available in the coming months.

As you can see the interface has also been updated. The website should be fully functional on any browser. If your browser supports cascading style sheets, it may even look good. If you should encounter any problems with the website please let me know. Comments and suggestions are also welcome.

Document last updated: Wed Aug 13 12:41:06 MEST 2003