Enzymatic Synthesis of Aliphatic Acyloins Catalyzed by Thermostable Transketolase
作者:Hubert Casajus、Aurélie Lagarde、Martin Leremboure、Thomas De Dios Miguel、Lionel Nauton、Vincent Thery、Wolf‐Dieter Fessner、Nicolas Duguet、Franck Charmantray、Laurence Hecquet
DOI:10.1002/cctc.202001160
日期:2020.11.19
stearothermophilus (TKgst) was successfully engineered for the synthesis of aliphatic acyloins with varying carbon backbone lengths (C5−C10) based on protein structure‐guided studies. Efficient TKgst variants were identified with enhanced activities for substrate combinations of aliphatic aldehydes as acceptors together with aliphatic pyruvate homologues as donors. The TKgst single variant L382F was
基于蛋白质结构指导的研究,成功地将源自嗜热脂肪热地芽孢杆菌(TK gst)的热稳定转酮醇酶进行了工程改造,以合成具有不同碳主链长度(C 5 -C 10)的脂族酰基。鉴定出有效的TK gst变体具有增强的活性,可用于脂族醛作为受体的底物组合以及脂族丙酮酸同系物作为供体。TK gst单一变体L382F能够有效地催化酮基从羟基丙酮酸转移到所有目标脂肪族醛(C 3 -C 8)得到相应的1,3-二羟基酮,并具有良好的收率和出色的对映选择性。先前为改善脂族丙酮酸同系物的利用率而设计的H102L / H474S突变与F435I交换的结合产生了新的变体H102L / H474S / F435I,该变体能够将2-氧代丁酸和2-氧戊酸的酰基转移到脂族醛,生成单羟基酮。