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Bench scale production of butyramide using free and immobilized cells of Bacillus sp. APB-6

机译:使用芽孢杆菌属细菌的游离和固定化细胞进行规模生产丁酰胺。 APB-6

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摘要

Butyramide is a commodity chemical having wide range of applications from material science to biological sciences including synthesis of therapeutic drugs, hydroxamic acids, and electrorheological fluids. The nitrile hydratase protein of Bacillus sp. APB-6 was explored to develop an efficient biocatalytic process for the biotransformation of butyronitrile to butyramide using free and immobilized cells. The reaction conditions for nitrile hydratase activity were not affected after immobilization of the free cells and the optimum pH and temperature for both free and immobilized cells were 8.0 and 55 A degrees C, respectively. In a 1-l batch reaction, complete conversion of 3000 mM butyronitrile to butyramide was achieved using free and immobilized cells. Immobilization of the cells further enhanced their operational stability and reusability in repetitive cycles of butyramide production. This bioconversion resulted in the formation of butyramide at a rate of 522.0 g h(-1) g(-1) dcw.
机译:丁酰胺是一种商品化学品,具有从材料科学到生物科学的广泛应用,包括合成治疗药物,异羟肟酸和电流变流体。芽孢杆菌的腈水合酶蛋白。探索了APB-6,以开发一种使用游离和固定化细胞将丁腈生物转化为丁酰胺的有效生物催化方法。固定游离细胞后,不影响腈水合酶活性的反应条件,游离和固定细胞的最佳pH和温度分别为8.0和55 A℃。在1-1批处理反应中,使用游离的固定化细胞可将3000 mM的丁腈完全转化为丁酰胺。在丁酰胺生产的重复循环中,细胞的固定进一步增强了它们的操作稳定性和可重复使用性。这种生物转化导致丁酰胺以522.0 g h(-1)g(-1)dcw的速率形成。

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