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Title: A Pseudomonas putida efflux pump acts on short-chain alcohols

Journal Article · · Biotechnology for Biofuels

Background: The microbial production of biofuels is complicated by a tradeoff between yield and toxicity of many fuels. Efflux pumps enable bacteria to tolerate toxic substances by their removal from the cells while bypassing the periplasm. Their use for the microbial production of biofuels can help to improve cell survival, product recovery, and productivity. However, no native efflux pump is known to act on the class of short-chain alcohols, important next-generation biofuels, and it was considered unlikely that such an efflux pump exists. Results: We report that controlled expression of the RND-type efflux pump TtgABC from Pseudomonas putida DOT-T1E strongly improved cell survival in highly toxic levels of the next-generation biofuels n-butanol, isobutanol, isoprenol, and isopentanol. GC-FID measurements indicated active efflux of n-butanol when the pump is expressed. Conversely, pump expression did not lead to faster growth in media supplemented with low concentrations of n-butanol and isopentanol.Conclusions: TtgABC is the first native efflux pump shown to act on multiple short-chain alcohols. Its controlled expression can be used to improve cell survival and increase production of biofuels as an orthogonal approach to metabolic engineering. Together with the increased interest in P. putida for metabolic engineering due to its flexible metabolism, high native tolerance to toxic substances, and various applications of engineering its metabolism, our findings endorse the strain as an excellent biocatalyst for the high-yield production of next-generation biofuels.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1618742
Alternate ID(s):
OSTI ID: 1460319
Journal Information:
Biotechnology for Biofuels, Journal Name: Biotechnology for Biofuels Vol. 11 Journal Issue: 1; ISSN 1754-6834
Publisher:
Springer Science + Business MediaCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

References (51)

Aromatic catabolic pathway selection for optimal production of pyruvate and lactate from lignin journal March 2015
Regulation of catabolic pathways in Pseudomonas. journal January 1971
Metabolic engineering of Escherichia coli for high-specificity production of isoprenol and prenol as next generation of biofuels journal January 2013
Engineering alternative butanol production platforms in heterologous bacteria journal July 2009
Metabolic response of Pseudomonas putida during redox biocatalysis in the presence of a second octanol phase: Metabolic response of P. putida to organic solvents journal September 2008
Engineering multiple genomic deletions in Gram-negative bacteria: analysis of the multi-resistant antibiotic profile of Pseudomonas putida KT2440: Tools for editing Gram-negative genomes journal August 2011
Pseudomonas putida—a versatile host for the production of natural products journal June 2015
Three Efflux Pumps Are Required To Provide Efficient Tolerance to Toluene in Pseudomonas putida DOT-T1E journal July 2001
Expanding metabolism for biosynthesis of nonnatural alcohols journal December 2008
Solvent tolerance in Gram-negative bacteria journal June 2012
Escherichia coli mar and acrAB Mutants Display No Tolerance to Simple Alcohols journal March 2010
Engineering mediator-based electroactivity in the obligate aerobic bacterium Pseudomonas putida KT2440 journal April 2015
Synthetic Pathway for Production of Five-Carbon Alcohols from Isopentenyl Diphosphate journal August 2012
Efflux Pumps Involved in Toluene Tolerance in Pseudomonas putida DOT-T1E journal July 1998
Engineering microbes for tolerance to next-generation biofuels journal January 2011
BglBrick vectors and datasheets: A synthetic biology platform for gene expression journal January 2011
Engineering an anaerobic metabolic regime in Pseudomonas putida KT2440 for the anoxic biodegradation of 1,3-dichloroprop-1-ene journal January 2013
Microbial engineering for the production of advanced biofuels journal August 2012
Analysis of solvent tolerance in Pseudomonas putida DOT-T1E based on its genome sequence and a collection of mutants journal July 2012
Understanding butanol tolerance and assimilation in P seudomonas putida  BIRD-1: an integrated omics approach : An omics approach of butanol response in journal January 2016
Mechanisms of solvent resistance mediated by interplay of cellular factors in Pseudomonas putida journal April 2015
Isolation and expansion of the catabolic potential of a Pseudomonas putida strain able to grow in the presence of high concentrations of aromatic hydrocarbons. journal July 1995
Trade-Offs in Improving Biofuel Tolerance Using Combinations of Efflux Pumps journal December 2014
A Pseudomonas putida double mutant deficient in butanol assimilation: a promising step for engineering a biological biofuel production platform journal January 2016
Non-fermentative pathways for synthesis of branched-chain higher alcohols as biofuels journal January 2008
Enhancing isoprenoid production through systematically assembling and modulating efflux pumps in Escherichia coli journal July 2013
Enhancing Tolerance to Short-Chain Alcohols by Engineering the Escherichia coli AcrB Efflux Pump to Secrete the Non-native Substrate n-Butanol journal September 2013
Engineered Synthetic Pathway for Isopropanol Production in Escherichia coli journal October 2007
Engineering microbial biofuel tolerance and export using efflux pumps journal January 2011
Drug transport mechanism of the AcrB efflux pump journal May 2009
Bacteria tolerant to organic solvents journal August 1998
A Pseudomonas thrives in high concentrations of toluene journal March 1989
Functional characterization of TtgABC efflux pump of the RND family in the entomopathogenic bacterium Pseudomonas entomophila journal June 2015
Growth of Pseudomonas taiwanensis VLB120∆C biofilms in the presence of n -butanol journal October 2016
Metabolic engineering for the high-yield production of isoprenoid-based C5 alcohols in E. coli journal June 2015
Identification and Molecular Characterization of an Efflux Pump Involved in Pseudomonas putida S12 Solvent Tolerance journal January 1998
Evolution, genomic analysis, and reconstruction of isobutanol tolerance in Escherichia coli journal January 2010
Selected Pseudomonas putida Strains Able To Grow in the Presence of High Butanol Concentrations journal May 2009
Gene expression from plasmids containing the araBAD promoter at subsaturating inducer concentrations represents mixed populations journal July 1997
Green fluorescent protein as a marker for Pseudomonas spp. journal January 1997
Mini-Tn5 transposon derivatives for insertion mutagenesis, promoter probing, and chromosomal insertion of cloned DNA in gram-negative eubacteria. journal November 1990
Energetics and Surface Properties of Pseudomonas putida DOT-T1E in a Two-Phase Fermentation System with 1-Decanol as Second Phase journal June 2006
Transcriptional feedback regulation of efflux protein expression for increased tolerance to and production of n-butanol journal January 2016
Metabolism of toluene and xylenes by Pseudomonas (putida (arvilla) mt-2: evidence for a new function of the TOL plasmid. journal January 1975
Multidrug efflux pumps of gram-negative bacteria. journal October 1996
Balancing a heterologous mevalonate pathway for improved isoprenoid production in Escherichia coli journal March 2007
Improving membrane protein expression and function using genomic edits journal October 2017
Development of Escherichia coli Strains That Withstand Membrane Protein-Induced Toxicity and Achieve High-Level Recombinant Membrane Protein Production journal November 2016
Improving Microbial Biogasoline Production in Escherichia coli Using Tolerance Engineering journal November 2014
In silico genome-scale metabolic analysis of Pseudomonas putida KT2440 for polyhydroxyalkanoate synthesis, degradation of aromatics and anaerobic survival journal June 2010
Engineering mediator-based electroactivity in the obligate aerobic bacterium Pseudomonas putida KT2440 text January 2015

Cited By (2)

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