Protist Ribosomal Reference database (PR2) - SSU rRNA gene database

2016-09-03T12:41:45Z (GMT) by Daniel Vaulot
The Protist Ribosomal Reference database (PR2) provides a unique access to eukaryotic small sub-unit (SSU) ribosomal RNA and DNA sequences, with curated taxonomy. The database mainly consists of nuclear-encoded protistan sequences. However, metazoans, land plants, macrosporic fungi and eukaryotic organelles (mitochondrion, plastid and others) are also included because they are useful for the analysis of high-troughput sequencing data sets. Introns and putative chimeric sequences have been also carefully checked. Taxonomic assignation of sequences consists of eight unique taxonomic fields.


The files provided are for use with Qiime or Mothur.  Four files are provided.
* pr2....fasta contains all sequences in fasta format
* contains the taxonomy of each sequence
* PR2 version notes.docx contains the revision history
* PR2 versions.xls is a condensed list of the different versions

Current version : 4.2 based on GenBank 203


- Tristan Biard
- Margot Tragin
- Bente Edvardsen

Guillou, L., Bachar, D., Audic, S., Bass, D., Berney, C., Bittner, L., Boutte, C. et al. 2013. The Protist Ribosomal Reference database (PR2): a catalog of unicellular eukaryote Small Sub-Unit rRNA sequences with curated taxonomy. Nucleic Acids Res. 41:D597–604.

Edvardsen, B., Egge, E.S. & Vaulot, D. 2016. Diversity and distribution of haptophytes revealed by environmental sequencing and metabarcoding – a review. Perspect. Phycol. in press.

Tragin, M., Lopes dos Santos, A., Christen, R. & Vaulot, D. 2016. Diversity and ecology of green microalgae in marine systems: an overview based on 18S rRNA gene sequences. Perspect. Phycol. in press.