This class is thought to guide the sites of modification of uridines to pseudouridines by forming direct base pairing interactions with substrate RNAs. Targets may include ribosomal and spliceosomal RNAs but the exact functions of many snoRNAs, including U19, are not confirmed.
A particular class is thought to facilitate the positioning of modifications on uridine residues in RNAs by establishing direct base pairings with substrate RNAs. Potential targets encompass ribosomal and spliceosomal RNAs; however, the specific functions of numerous snoRNAs, such as U19, remain unverified.