Labeling Studies Clarify the Committed Step in Bacterial Gibberellin Biosynthesis
作者:Ryan S. Nett、Jeroen S. Dickschat、Reuben J. Peters
DOI:10.1021/acs.orglett.6b02569
日期:2016.12.2
Bacteria have evolved gibberellin phytohormone biosynthesis independently of plants and fungi. Through 13C-labeling and NMR analysis, the mechanistically unusual “B” ring contraction catalyzed by a cytochrome P450 (CYP114), which is the committed step in gibberellin biosynthesis, was shown to occur via oxidative extrusion of carbon-7 from ent-kaurenoic acid in bacteria. This is identical to the convergently
细菌独立于植物和真菌进化出了赤霉素植物激素的生物合成。通过13 C 标记和 NMR 分析,细胞色素 P450 (CYP114) 催化的机械上不寻常的“B”环收缩是赤霉素生物合成的关键步骤,表明是通过对角贝壳杉烯酸中碳 7 的氧化挤出而发生的细菌中的酸。这与植物和真菌中趋同进化的化学转化相同,表明常见的半频哪醇重排机制可能由碳-4α羧酸酯邻近性引导。