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LOW REACTION TEMPERATURE INCREASES THE SELECTIVITY IN AN ENZYMATIC REACTION DUE TO SUBSTRATE SOLVATION EFFECTS

机译:较低的反应温度由于基质的溶剂化作用,提高了酶反应的选择性

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immobilized alpha-chymotrypsin was used as catalyst for studying temperature effects on acyl transfer reactions (acyl-donor: Bz-TyrOEt) in a water-immiscible organic solvent. The solubility of the two nucleophiles, Phe-NH, and water, decreased with decreasing temperature. The relative decrease for the amide was larger (2.4-fold) than for water. Therefore the thermodynamic activity (estimated by the relative saturation) increased more for this substrate and hence the selectivity in the reaction was increased. [References: 5]
机译:固定化的α-胰凝乳蛋白酶被用作催化剂,以研究温度在与水不混溶的有机溶剂中对酰基转移反应(酰基供体:Bz-TyrOEt)的影响。两种亲核试剂Phe-NH和水的溶解度随温度降低而降低。酰胺的相对减少量大于水的相对减少量(2.4倍)。因此,该底物的热力学活性(由相对饱和度估计)进一步增加,因此反应的选择性增加。 [参考:5]

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