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

Abstract

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.

Authors:
 [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)
Publication Date:
Research Org.:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Org.:
USDOE Office of Policy and International Affairs (PO); US Department of Agriculture (USDA); USDOE Office of International Affairs (IA)
OSTI Identifier:
1613814
Alternate Identifier(s):
OSTI ID: 1766300
Grant/Contract Number:  
PI0000031; 2012-67009-19596; 2011-10006-30358
Resource Type:
Accepted Manuscript
Journal Name:
Biotechnology for Biofuels
Additional Journal Information:
Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 1754-6834
Publisher:
BioMed Central
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; 09 BIOMASS FUELS; Biotechnology & Applied Microbiology; Energy & Fuels; Butyrate; Fermentation; E. coli; Xylose; Mineral salt medium; xylose; mineral salts medium

Citation Formats

Wang, Liang, Chauliac, Diane, Moritz, Brelan E., Zhang, Guimin, Ingram, Lonnie O., and Shanmugam, K. T. Metabolic engineering of Escherichia coli for the production of butyric acid at high titer and productivity. United States: N. p., 2019. Web. doi:10.1186/s13068-019-1408-9.
Wang, Liang, Chauliac, Diane, Moritz, Brelan E., Zhang, Guimin, Ingram, Lonnie O., & Shanmugam, K. T. Metabolic engineering of Escherichia coli for the production of butyric acid at high titer and productivity. United States. https://doi.org/10.1186/s13068-019-1408-9
Wang, Liang, Chauliac, Diane, Moritz, Brelan E., Zhang, Guimin, Ingram, Lonnie O., and Shanmugam, K. T. Fri . "Metabolic engineering of Escherichia coli for the production of butyric acid at high titer and productivity". United States. https://doi.org/10.1186/s13068-019-1408-9. https://www.osti.gov/servlets/purl/1613814.
@article{osti_1613814,
title = {Metabolic engineering of Escherichia coli for the production of butyric acid at high titer and productivity},
author = {Wang, Liang and Chauliac, Diane and Moritz, Brelan E. and Zhang, Guimin and Ingram, Lonnie O. and Shanmugam, K. T.},
abstractNote = {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.},
doi = {10.1186/s13068-019-1408-9},
journal = {Biotechnology for Biofuels},
number = 1,
volume = 12,
place = {United States},
year = {Fri Mar 22 00:00:00 EDT 2019},
month = {Fri Mar 22 00:00:00 EDT 2019}
}

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