This group consists of eukaryotic pseudouridine synthases similar to Saccharomyces cerevisiae Pus7. Pseudouridine synthases catalyze the isomerization of specific uridines in an RNA molecule to pseudouridines (5-ribosyluracil, psi). Saccharomyces cerevisiae Pus7 makes psi35 in U2 small nuclear RNA (U2 snRNA), psi13 in cytoplasmic tRNAs and psi35 in pre-tRNATyr. Psi35 in yeast U2 snRNA and psi13 in tRNAs are highly phylogenetically conserved. Psi34 is the mammalian U2 snRNA counterpart of yeast U2 snRNA psi35.
Comment:Comment: D257 of active site of S. cerevisiae Pus7p is key conserved residue
Comment:The S. cerevisiae Pus7 residue F307 is conserved in the TruD family, while it is a conserved tyrosine in the other pseudouridine synthase families