Structures of PT-barrels.

Pairwise sequence identities, RMSDs and TM-scores of the four aromatic prenyltransferases NphB (PDB 1ZB6), CloQ (2XLQ), DMATS (3I4Z) and FtmPT1 (3O2K) are shown. The schemes besides the structures depict the topology of the secondary structural elements.