Enzymatic Formation of Unnatural Novel Polyketides from Alternate Starter and Nonphysiological Extension Substrate by Chalcone Synthase
作者:Ikuro Abe、Yusuke Takahashi、Weiwei Lou、Hiroshi Noguchi
DOI:10.1021/ol0300165
日期:2003.4.1
[reaction: see text] In the chalcone synthase (CHS) enzyme reaction, both the starter molecule and the extension unit of the polyketide chain elongation reaction were simultaneously replaced with nonphysiological substrates. When incubated with benzoyl-CoA and methylmalonyl-CoA as substrates, recombinant CHS from Scutellaria baicalensis afforded an unnatural novel triketide, 4-hydroxy-3,5-dimethyl
[反应:见正文]在查尔酮合酶(CHS)酶反应中,起始酮分子和聚酮化合物链延长反应的延伸单元同时被非生理性底物取代。当与苯甲酰辅酶A和甲基丙二酰辅酶A作为底物一起孵育时,黄S中的重组CHS提供了一种非天然的新型三酮化合物4-羟基-3,5-二甲基-6-苯基吡喃-2-酮以及四酮化合物4 -羟基-3,5-二甲基-6-(1-甲基-2-氧代-2-苯基-乙基)-吡喃-2-一。另一方面,该酶还接受己酰基-CoA和甲基丙二酰基-CoA作为底物,以产生非天然的新型三酮化合物4-羟基-3,5-二甲基-6-戊基-吡喃-2-酮。