. "Catalysis of the reaction: RNA uridine = RNA pseudouridine. Conversion of uridine in an RNA molecule to pseudouridine by rotation of the C1'-N-1 glycosidic bond of uridine in RNA to a C1'-C5." . . "pseudouridine synthase activity" . "transfer ribonucleate pseudouridine synthetase activity" . "transfer RNA pseudouridine synthetase activity" . "tRNA pseudouridylate synthase I activity" . "tRNA-pseudouridine synthase activity" . "tRNA-pseudouridine synthase I activity" . "tRNA-uridine isomerase activity" . "tRNA-uridine uracilmutase activity" . . . .