Cupin Variants as a Macromolecular Ligand Library for Stereoselective Michael Addition of Nitroalkanes
作者:Nobutaka Fujieda、Haruna Ichihashi、Miho Yuasa、Yosuke Nishikawa、Genji Kurisu、Shinobu Itoh
DOI:10.1002/anie.202000129
日期:2020.5.11
coordination sphere of TM1459 revealed that H52A and H54A/H58A mutants effectively catalyzed the diastereo- and enantioselective Michael addition reaction of nitroalkanes to an α,β-unsaturated ketone. Moreover, calculated substrate docking signified C106N and F104W single-point mutations, which inverted the diastereoselectivity of H52A and further improved the stereoselectivity of H54A/H58A, respectively
Cupin超家族蛋白(TM1459)作为具有双链β桶结构的大分子配体框架,通过组氨酸侧链与Cu离子连接。变异TM1459的第一个配位域表明,H52A和H54A / H58A突变体有效催化硝基烷烃向α,β-不饱和酮的非对映和对映选择性迈克尔加成反应。而且,计算的底物对接表示C106N和F104W单点突变,其分别逆转了H52A的非对映选择性并进一步提高了H54A / H58A的立体选择性。