کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
680467 1459973 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced succinic acid production and magnesium utilization by overexpression of magnesium transporter mgtA in Escherichia coli mutant
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله
Enhanced succinic acid production and magnesium utilization by overexpression of magnesium transporter mgtA in Escherichia coli mutant
چکیده انگلیسی
In this study, a novel engineered Escherichia coli strain KMG111 was constructed by overexpression of mgtA in E. coli mutant DC1515. By adopting KMG111, nearly a concentration of succinic acid (32.41 g L−1) with a yield of 0.81 g g−1 glucose, could be obtained in a batch fermentation by using the low-cost mixture of Mg(OH)2 and NH3·H2O to replace MgCO3 as the alkaline neutralizer. Moreover, the effect of the inhibitory compounds in lignocellulosic hydrolyzates on cell growth and succinic acid production could be relieved. In a 3-L bioreactor, the overall productivity and yield of succinic acid in the whole anaerobic stage were 2.15 g L−1 h−1 and 0.86 g g−1 total sugar, respectively. This study was the first to report decreased alkaline neutralizer cost via genetic manipulation for succinic acid production, which contributed to the industrialization of this microbial synthesis process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 170, October 2014, Pages 125-131
نویسندگان
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