ABBA-type aromatic prenyltransferases (PTases) are a subgroup of prenyltransferases that are characterized by an unusual type of beta/alpha fold with antiparallel beta strands. They lack the (N/D)DxxD motif which is characteristic for many other prenyltransferases. Generally, aromatic prenyltransferases (PTs) catalyze the regioselective transfer of prenyl moieties onto aromatic substrates, forming C-C bonds between C-1 or C-3 of the isoprenoid substrate and one of the aromatic carbons of the acceptor substrate by an electrophilic alkylation, or Friedel-Crafts alkylation mechanism.
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