To investigate the transformation from (2E,6E)-farnesyl pyrophosphate to (2Z,4E)-γ-ionylideneethanol in the abscisic acid-producing fungi, Cercospora cruenta, plausible [2–14C]-C15 intermediates were prepared and fed. Substrates such as (2E,6E)-farnesyl pyrophosphate, (2Z,4E)-γ-ionylideneethanol and its pyrophosphate were incorporated into ABA and its known biosynthetic precursors. It is suggested that (2E,6E>farnesyl pyrophosphate is converted to (2Z,4E)-γ-ionylideneethanol in four consecutive steps: dehydrogenation, isomerization, cyclization and hydrolysis.
为了研究
脱落酸产生真菌 Cercospora cruenta 从(2E,6E)-法呢基
焦磷酸盐到(2Z,4E)-γ-亚
氨基
乙醇的转化过程,我们制备并饲喂了[2-14C]-C15中间产物。(2E,6E)-法呢酰
焦磷酸、(2Z,4E)-γ-亚
氨基
乙醇及其
焦磷酸等底物被并入 A
BA 及其已知的
生物合成前体。研究表明,(2E,6E>
法呢醇焦磷酸酯是通过
脱氢、异构化、环化和
水解四个连续步骤转化为(2Z,4E)-γ-亚
氨基
乙醇的。