Novel Ketosynthases Catalyzing the Non-Decarboxylative Claisen Condensation

In this review, we present the recent advances in unusual novel ketosynthases catalyzing the non-decarboxylative Claisen condensations, including CsyB, MxnB/CorB, Ppys and StlD. The differences are summarized between these non-decarboxylative ketosynthases and the typical decarboxylative ketosynthases. Furthermore, the detailed enzymatic characteristics, structural basis, and catalytic mechanismof these novel ketosynthasesare described. Finally, the prospect of these kind of ketosynthases is discussed.