کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6494406 44804 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metabolic engineering of Escherichia coli for the production of 3-aminopropionic acid
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Metabolic engineering of Escherichia coli for the production of 3-aminopropionic acid
چکیده انگلیسی
A novel metabolic pathway was designed for the production of 3-aminopropionic acid (3-AP), an important platform chemical for manufacturing acrylamide and acrylonitrile. Using a fumaric acid producing Escherichia coli strain as a host, the Corynebacterium glutamicum panD gene (encoding l-aspartate-α-decarboxylase) was overexpressed and the native promoter of the aspA gene was replaced with the strong trc promoter, which allowed aspartic acid production through the aspartase-catalyzed reaction. Additional overexpression of aspA and ppc genes, and supplementation of ammonium sulfate in the medium allowed production of 3.49 g/L 3-AP. The 3-AP titer was further increased to 3.94 g/L by optimizing the expression level of PPC using synthetic promoters and RBS sequences. Finally, native promoter of the acs gene was replaced with strong trc promoter to reduce acetic acid accumulation. Fed-batch culture of the final strain allowed production of 32.3 g/L 3-AP in 39 h.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Metabolic Engineering - Volume 30, July 2015, Pages 121-129
نویسندگان
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