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Applied Biological Chemistry
Fig. 1 | Applied Biological Chemistry

Fig. 1

From: Piperonal synthase from black pepper (Piper nigrum) synthesizes a phenolic aroma compound, piperonal, as a CoA-independent catalysis

Fig. 1

A proposed biosynthetic pathway of of piperonal from 3,4-MDCA. It has been postulated that phenylalanine is converetd to 3,4-methylenedioxycinnamic acid (3,4-MDCA). The side chain of 3,4-MDCA was cleaved by a Piper nigrum hydratase/lyase (PnPNS) to generate piperonal. Vanilla planifolia vanillin synthase (VpVAN) converts ferulic acid to vanillin. The solid arrows denote the catalytic steps with a known mechanism, the dashed arrow denotes a proposed reaction

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