BiobaseFR3D

Provides importers for FR3D resource files. Of particular interest are basepairs files which describe canonical and non-canonical (non-Watson-Crick) base pairings in RNA secondary structure. The original FR3D paper is: FR3D: Finding Local and Composite Recurrent Structural Motifs in RNA 3D Structures, Michael Sarver; Craig L. Zirbel; Jesse Stombaugh; Ali Mokdad; Neocles B. Leontis. /Journal of Mathematical Biology/ (2008) 56:215–252. Changes since any 0.1.*: Zero-based indexing (FR3D is one-based!) for sequence positions. We do not change the nucleotide PDB number. Some sanity checks, a number of FR3D files fall through at this and need to be checked for consistency