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Title: Mutation in galP improved fermentation of mixed sugars to succinate using engineered Escherichia coli AS1600a and AM1 mineral salts medium

Journal Article · · Bioresource Technology
 [1];  [1];  [2];  [2];  [2];  [2];  [2]
  1. Suranaree Univ. of Technology, Nakhon Ratchasima (Thailand)
  2. Univ. of Florida, Gainesville, FL (United States)

Escherichia coli KJ122 was engineered to produce succinate from glucose using the wild type GalP for glucose uptake instead of the native phosphotransferase system (ptsI mutation). This strain now ferments 10% xylose poorly. Mutants were selected by serial transfers in AM1 mineral salts medium with 10% xylose. Clones from this population all exhibited a similar improvement, co-fermentation of an equal mixture of xylose and glucose. One of these, AS1600a, produced 84.26 ± 1.37 g/L succinate, equivalent to that produced by the parent (KJ122) from 10% glucose (85.46 ± 1.78 g/L). AS1600a was sequenced and found to contain a mutation in galactose permease (GalP, G236D). This mutation was shown to be responsible for the improvement in fermentation using KJΔgalP as the host and expression vectors with native galP and with mutant galP*. Strain AS1600a and KJΔgalP(pLOI5746; galP*) also co-fermented a mixture of glucose, xylose, arabinose, and galactose in sugarcane bagasse hydrolysate using mineral salts medium.

Research Organization:
Univ. of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE Office of International Affairs (IA); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Bioenergy Technologies Office; U.S. Department of Agriculture; Thailand Research Fund (TRF)
Grant/Contract Number:
PI0000031; PHD/0135/2553
OSTI ID:
1771326
Alternate ID(s):
OSTI ID: 1250363; OSTI ID: 1661478
Journal Information:
Bioresource Technology, Vol. 193; ISSN 0960-8524
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (7)

Bio‐based succinic acid: an overview of strain development, substrate utilization, and downstream purification journal November 2019
ATP-Based Ratio Regulation of Glucose and Xylose Improved Succinate Production journal June 2016
Experimental evolution reveals an effective avenue to release catabolite repression via mutations in XylR journal June 2017
Chromosomal mutations in Escherichia coli that improve tolerance to nonvolatile side‐products from dilute acid treatment of sugarcane bagasse journal November 2019
Parallel experimental evolution reveals a novel repressive control of GalP on xylose fermentation in Escherichia coli journal May 2019
Catabolic Division of Labor Enhances Production of D-Lactate and Succinate From Glucose-Xylose Mixtures in Engineered Escherichia coli Co-culture Systems journal May 2020
Short-Term Adaptation Modulates Anaerobic Metabolic Flux to Succinate by Activating ExuT, a Novel D-Glucose Transporter in Escherichia coli journal January 2020