2r99 is a 1 chain structure with sequence from Human. This structure supersedes the now removed PDB entry 1zcx. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
[PPIE_HUMAN] PPIases accelerate the folding of proteins. It catalyzes the cis-trans isomerization of proline imidic peptide bonds in oligopeptides. Combines RNA-binding and PPIase activities. May be involved in muscle- and brain-specific processes. May be involved in pre-mRNA splicing.