Transposase that is always flanked by repeated extragenic palindrome (REP) sequences, which are clustered in structures called bacterial interspersed mosaic elements (BIMEs). RayT catalyzes cleavage and recombination of BIMEs. Binds REP sequences and cleaves BIMEs both upstream and downstream of the REP sequence. Could be important in the creation of BIME variability and amplification. Cleavage occurs in the presence of magnesium, but is much more pronounced with manganese. Monomer. Belongs to the transposase 17 family. RAYT subfamily.