Table 2.

Selected features of databases collecting RNA structure motifs

	RNA FRABASE	RNA 3D motif atlas	RNA bricks	RAG-3D	RNAJunction	RNAloops
I Supported RNA motifs	Any	Any	Any	Any	Multiloops	Multiloops
II Database content
Sequence	✓	✓	✓	✓	✓	✓
Secondary structure	✓		✓	✓		✓
Tertiary structure	✓	✓	✓	✓	✓	✓
Graph-based features				✓
Angular data	✓					✓
III Search criteria
PDB ID	✓	✓	✓	✓	✓	✓
Sequence	✓	✓	✓	✓	✓	✓
Secondary structure	✓		✓	✓		✓
Motif topology search	✓		✓			✓
Angular data	✓					✓
IV Download options
Tertiary structure	✓	✓	✓	✓	✓	✓
Other motif-specific data	✓					✓
Table with search results	✓	✓	✓			✓
Visualizations				✓		✓
V Other facilities
Output data visualization			✓			✓
Stats of database contents			✓			✓
Regular data updates	✓	✓	✓	✓		✓
Secure communication (HTTPS)						✓