二硫苏糖醇对真菌α-淀粉酶的激活作用。
Activation of fungal alpha-amylase by dithioerythritol.
作者信息
Ulbrich R, Schellenberger A
出版信息
Acta Biol Med Ger. 1979;38(11-12):1539-42.
PMID:95240
Abstract
The activity of fungal alpha-amylase has been shown to be influenced by disulfide-reducing reagents. Thus, the enzymatic activity increases in the presence of dithioerythritol or 2-mercaptoethanol. L-Cysteine is also capable of increasing the activity, but the activation competes with an inactivation reaction which dominates at higher reagent concentrations (greater than 20 mM). A possible scheme interpreting the results is given.
摘要
真菌α-淀粉酶的活性已被证明会受到二硫键还原试剂的影响。因此，在二硫苏糖醇或2-巯基乙醇存在的情况下，酶活性会增加。L-半胱氨酸也能够增加活性，但这种激活作用会与一种失活反应相互竞争，在较高试剂浓度（大于20 mM）时，失活反应占主导。文中给出了一个解释这些结果的可能机制。
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