CRW2: Comparative RNA Web-2 – data explorer

1. Find an RNA structure and download its files

Organism Structure ID RNA Source Show structures Reset

Every list shows only what is in the database, and choosing a value in one list narrows the others (numbers in brackets are structure counts). Use any one list on its own or combine them. Click a list and type the first letters to jump to an entry. The results page has links to download each file.

2. Look up base-pair statistics

Molecule 16S rRNA 23S rRNA 5S rRNA Nucleotide position Look up

Shows every base pair involving that position, with frequencies and covariation scores for each taxonomic group.

Download a whole table

Molecule	Frequencies (CSV)	Collective scores (CSV)
5S	CSV	not available for 5S
16S	CSV	CSV
23S	CSV	CSV

The published tables (HTML, PDF and Excel, latest version) are listed on the published tables page.

3. View a structure interactively

RNA2DMap: explore a secondary-structure diagram with conservation, base-pair type, motif and (where available) 3D-distance overlays.

• 16S rRNA – Escherichia coli
• 16S rRNA – Thermus thermophilus (PDB 1FJF)
• 23S rRNA – Escherichia coli
• 23S rRNA – Haloarcula marismortui (PDB 1FFK)
• 5S rRNA – Escherichia coli
• 5S rRNA – Haloarcula marismortui (PDB 1FFK)