Enhancing Production of Alkaline Polygalacturonate Lyase from Bacillus subtilis by Fed-Batch Fermentation

Enhancing Production of Alkaline Polygalacturonate Lyase from Bacillus subtilis by Fed-Batch Fermentation
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通过补料分批发酵提高枯草芽孢杆菌碱性聚半乳糖醛酸裂解酶的产量

DOI:
10.1371/journal.pone.0090392
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发表时间:
2014-03
期刊:
影响因子:
3.7
通讯作者:
Qu, Yinbo
Qu, Yinbo
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Guo, Fenfen;Li, Xuezhi;Zhao, Jian;Qu, Yinbo

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碱性聚半乳糖醛酸裂解酶(PGL,EC 4.2.2.2)是一种用于许多工业的酶。为了提高枯草芽孢杆菌7-3-3的PGL产量,降低生产成本,我们开发了一种补料分批发酵工艺,该工艺将碳源的酶促预处理和发酵液的pH控制相结合。与对照(202.5 U mL − 1)相比,在用氨补料之前将发酵液维持在pH 6.5以及在补料之后将发酵液维持在pH 6.0显著提高了PGL活性(743.5 U mL − 1)。发酵38 h后,平均PGL生产率达到19.6 U mL−1 h−1。粗PGL适合于环境友好型苎麻酶法脱胶。
Alkaline polygalacturonate lyase (PGL, EC 4.2.2.2) is an enzyme used in many industries. We developed a fed-batch fermentation process that combines the enzymatic pretreatment of the carbon source with controlling the pH of the fermentative broth to enhance the PGL production from Bacillus subtilis 7-3-3 to decrease the production cost. Maintaining the fermentation broth at pH 6.5 prior to feeding with ammonia and at pH 6.0 after feeding significantly improved PGL activity (743.5 U mL−1) compared with the control (202.5 U mL−1). The average PGL productivity reached 19.6 U mL−1 h−1 after 38 h of fermentation. The crude PGL was suitable for environmentally friendly ramie enzymatic degumming.
具有优化调节元件的枯草芽孢杆菌中碱性多聚半乳糖醛酸裂解酶的高水平胞外生产。
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发表时间: 2013-10
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