甲酸脱氢酶
格式化
化学
辅因子
叠氮化钠
生物催化
NAD+激酶
组合化学
酶动力学
叠氮化物
酶
催化作用
脱氢酶
生物化学
活动站点
有机化学
反应机理
作者
Rattima Boonkumkrong,Paweenapon Chunthaboon,Pobthum Munkajohnpong,Pratchaya Watthaisong,Panu Pimviriyakul,Somchart Maenpuen,Pimchai Chaiyen,Ruchanok Tinikul
标识
DOI:10.1002/biot.202300330
摘要
NAD+ -dependent formate dehydrogenase (FDH) catalyzes the conversion of formate and NAD+ to produce carbon dioxide and NADH. The reaction is biotechnologically important because FDH is widely used for NADH regeneration in various enzymatic syntheses. However, major drawbacks of this versatile enzyme in industrial applications are its low activity, requiring its utilization in large amounts to achieve optimal process conditions. Here, FDH from Bacillus simplex (BsFDH) was characterized for its biochemical and catalytic properties in comparison to FDH from Pseudomonas sp. 101 (PsFDH), a commonly used FDH in various biocatalytic reactions. The data revealed that BsFDH possesses high formate oxidizing activity with a kcat value of 15.3 ± 1.9 s-1 at 25°C compared to 7.7 ± 1.0 s-1 for PsFDH. At the optimum temperature (60°C), BsFDH exhibited 6-fold greater activity than PsFDH. The BsFDH displayed higher pH stability and a superior tolerance toward sodium azide and H2 O2 inactivation, showing a 200-fold higher Ki value for azide inhibition and remaining stable in the presence of 0.5% H2 O2 compared to PsFDH. The application of BsFDH as a cofactor regeneration system for the detoxification of 4-nitrophenol by the reaction of HadA, which produced a H2 O2 byproduct was demonstrated. The biocatalytic cascades using BsFDH demonstrated a distinct superior conversion activity because the system tolerated H2 O2 well. Altogether, the data showed that BsFDH is a robust enzyme suitable for future application in industrial biotechnology.
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