Controlling the Regioselectivity of Baeyer-Villiger Monooxygenases by Mutation of Active-Site Residues
作者:Kathleen Balke、Marcus Bäumgen、Uwe T. Bornscheuer
DOI:10.1002/cbic.201700223
日期:2017.8.17
Baeyer–Villiger monooxygenase (BVMO)-mediated regiodivergent conversions of asymmetric ketones can lead to the formation of “normal” or “abnormal” lactones. In a previous study, we were able to change the regioselectivity of a BVMO by mutation of the active-site residues to smaller amino acids, which thus created more space. In this study, we demonstrate that this method can also be used for other
Baeyer-Villiger单加氧酶(BVMO)介导的不对称酮的区域发散性转化可导致形成“正常”或“异常”内酯。在先前的研究中,我们能够通过将活性位点残基突变为较小的氨基酸来改变BVMO的区域选择性,从而创造了更多的空间。在这项研究中,我们证明了该方法也可用于其他BVMO /底物组合。我们调查的区域选择性2-氧代Δ 3 -4,5,5-trimethylcyclopentenylacetyl辅酶A从单加氧酶恶臭假单胞菌(OTEMO)对于顺式-二环[3.2.0]庚-2-烯-6-酮(1)和反式-二氢香芹酮(2),并且我们能够切换该酶对底物对映体之一的区域选择性。OTEMO野生型酶将(-)- 1转化为正常产物和异常产物的均等(50:50)混合物。F255A / F443V变体产生正常产品的90%,而W501V变体形成异常产品的98%。OTEMO F255A仅从(+)- 2产生正常的内酯,而野生型