Mutations involving amino acid substitution were introduced into various sites of diphosphomevalonate decarboxylase (MVD), thus preparing a large number of MVD variants. Then, the variants were each evaluated in terms of a catalytic activity for production of olefin compounds such as isoprene. As a result, it was found that substitution of glycine at position 152 with a different amino acid resulted in improvement in the catalytic activity. In addition, it was found that the MVD in which arginine at position 74 and threonine at position 209 in addition to the position 152 were further substituted with different amino acids, respectively, also had the high catalytic activity.
在二
磷酸戊二酸脱羧酶(MVD)的不同位点引入了涉及
氨基酸取代的突变,从而制备了大量的 MVD 变体。然后,对这些变体生产烯烃化合物(如
异戊二烯)的催化活性进行了评估。结果发现,用不同的
氨基酸取代位置 152 上的甘
氨酸可提高催化活性。此外,研究还发现,除位置 152 外,位置 74 的精
氨酸和位置 209 的苏
氨酸分别被不同的
氨基酸进一步取代的 MVD 也具有很高的催化活性。