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Title: Metabolic engineering of Escherichia coli for the production of butyric acid at high titer and productivity

Journal Article · · Biotechnology for Biofuels
 [1];  [1];  [1];  [2];  [1];  [1]
  1. Univ. of Florida, Gainesville, FL (United States)
  2. Univ. of Florida, Gainesville, FL (United States); Hubei Univ., Wuhan (China)

Background: Several anaerobic bacteria produce butyric acid, a commodity chemical with use in chemical, pharmaceutical, food and feed industries, using complex media with acetate as a co- product. Butyrate titer of various recombinant Escherichia coli did not exceed 10 g.l-1 in batch fermentations in any of the media tested. Results: A recombinant E. coli (strain LW393) that produced butyrate as the major fermentation product was constructed with genes from E. coli, Clostridium acetobutylicum and Treponema denticola. Strain LW393 produced 323 ± 6 mM (28.4 ± 0.4 g.l-1) butyric acid in batch fermentations in mineral salts medium with glucose as C-source at a yield of 0.37 ± 0.01 g.(g -1 glucose consumed) Supplementing this medium with yeast extract further increased butyric acid titer to 375 ± 4 mM. . Butyrate accounted for 90% of the total products produced by the culture. -1 -1 Average volumetric productivity of butyrate with xylose as C-source was 0.89 ± 0.07 g.l .h . Conclusions: The butyrate titer reported in this study is about 2.5-3-times higher than the values reported for other recombinant E. coli and this is achieved in mineral salts medium with an expectation of lower purification and production cost of butyrate.

Research Organization:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of Policy and International Affairs (PO); US Department of Agriculture (USDA); USDOE Office of International Affairs (IA)
Grant/Contract Number:
PI0000031; 2012-67009-19596; 2011-10006-30358
OSTI ID:
1613814
Alternate ID(s):
OSTI ID: 1766300
Journal Information:
Biotechnology for Biofuels, Vol. 12, Issue 1; ISSN 1754-6834
Publisher:
BioMed CentralCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Syngas-aided anaerobic fermentation for medium-chain carboxylate and alcohol production: the case for microbial communities journal October 2019
Recent advances in the applications of promoter engineering for the optimization of metabolite biosynthesis journal January 2019
Modeling the Interplay between Photosynthesis, CO2 Fixation, and the Quinone Pool in a Purple Non-Sulfur Bacterium journal September 2019
A comprehensive metabolic map for production of bio-based chemicals journal January 2019
Starter consortia for on-farm cocoa fermentation and their quality attributes journal November 2019
Impact of forced fatty acid synthesis on metabolism and physiology of Saccharomyces cerevisiae journal August 2018
Effects of overexpression of STB5 in Saccharomyces cerevisiae on fatty acid biosynthesis, physiology and transcriptome journal March 2019
Effects of a high-cultivation temperature on the physiology of three different Yarrowia lipolytica strains journal October 2019
Boosting Secondary Metabolite Production and Discovery through the Engineering of Novel Microbial Biosensors journal July 2018
Peroxisomes and peroxisomal transketolase and transaldolase enzymes are essential for xylose alcoholic fermentation by the methylotrophic thermotolerant yeast, Ogataea (Hansenula) polymorpha journal July 2018
Nutrient composition and safety evaluation of simulated isobutanol distillers dried grains with solubles and associated fermentation metabolites when fed to male Ross 708 broiler chickens (Gallus domesticus) journal July 2019
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