The combinatorial modulation of inter- and intra-subunit interactions of decameric D-fructose-6-phosphate aldolase A (FSAA) generated a triple-site variant I31T/Q59T/I195Q FSAA with 27- to 278-fold improvement in activity towards target heteroaromatic aldehydes. X-ray crystallographic data and molecular dynamics simulations ascribed the enhanced activity to the pronounced flexibility of the interface region between subunits, the expanded substrate entrance and binding pocket, and enhanced proton transfer, unambiguously demonstrating the efficiency of this strategy for engineering multimeric enzymes.

中文翻译：

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通过组合调节亚基间和亚基间的相互作用来设计十聚的d-果糖-6-磷酸醛缩酶A。

十聚D-果糖-6-磷酸醛缩酶A（FSAA）的亚基间和亚基间相互作用的组合调节产生了三位点变体I31T / Q59T / I195Q FSAA，对目标杂芳族化合物的活性提高了27-278倍醛。X射线晶体学数据和分子动力学模拟将增强的活性归因于亚基之间界面区域的显着柔性，扩大的底物入口和结合口袋以及增强的质子转移，这无疑证明了该策略用于工程化多聚酶的效率。