کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
679497 | 1459945 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Simultaneous conversion of glucose and xylose to 3-hydroxypropionic acid in engineered Escherichia coli by modulation of sugar transport and glycerol synthesis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
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چکیده انگلیسی
Escherichia coli expressing the Lactobacillus brevis dhaB1B2B3 and dhaR1R2 clusters and Pseudomonas aeruginosa aldhH was engineered to produce 3-HP from glucose and xylose via the glycerol biosynthetic pathway. Glycerol, a key precursor for 3-HP biosynthesis was produced by overexpression of the GPD1 and GPP2 genes from Saccharomyces cerevisiae. For relief of carbon catabolite repression, deletion of the chromosomal ptsG gene and overexpression of the endogenous xylR gene rendered engineered E. coli JHS01300/pCPaGGRm to utilize glucose and xylose simultaneously and to produce glycerol at 0.48Â g/g yield and 0.35Â g/L-h productivity. Finally, engineered E. coli JHS01300/pELDRRÂ +Â pCPaGGRm produced 29.4Â g/L of 3-HP with 0.54Â g/L-h productivity and 0.36Â g/g yield in a sugar-limited fed-batch fermentation. It was concluded that dual modulation of sugar transport and glycerol biosynthesis is a promising strategy for efficient conversion of glucose and xylose to 3-HP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Bioresource Technology - Volume 198, December 2015, Pages 709-716
Journal: Bioresource Technology - Volume 198, December 2015, Pages 709-716
نویسندگان
In-Young Jung, Jong-Won Lee, Won-Ki Min, Yong-Cheol Park, Jin-Ho Seo,