23S rRNA pseudouridine<sup>2605</sup> synthase (, RluB, YciL) is an enzyme with systematic name 23S rRNA-uridine<sup>2605</sup> uracil mutase. This enzyme catalyses the following chemical reaction
Pseudouridine synthase RluB converts uridine<sup>2605</sup> of 23S rRNA to pseudouridine.