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Title: Modular Engineering of Biomass Degradation Pathways

Abstract

Production of fuels and chemicals from renewable lignocellulosic feedstocks is a promising alternative to petroleum-derived compounds. Because of the complexity of lignocellulosic feedstocks, microbial conversion of all potential substrates will require substantial metabolic engineering. Non-model microbes offer desirable physiological traits, but also increase the difficulty of heterologous pathway engineering and optimization. The development of modular design principles that allow metabolic pathways to be used in a variety of novel microbes with minimal strain-specific optimization will enable the rapid construction of microbes for commercial production of biofuels and bioproducts. In this review, we discuss variability of lignocellulosic feedstocks, pathways for catabolism of lignocellulose-derived compounds, challenges to heterologous engineering of catabolic pathways, and opportunities to apply modular pathway design. Implementation of these approaches will simplify the process of modifying non-model microbes to convert diverse lignocellulosic feedstocks.

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1523739
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Processes
Additional Journal Information:
Journal Volume: 7; Journal Issue: 4; Journal ID: ISSN 2227-9717
Publisher:
Multidisciplinary Digital Publishing Institute (MDPI)
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; metabolic engineering; lignin valorization; lignocellulose; biofuels; hemicellulose

Citation Formats

Chaves, Julie E., Presley, Gerald N., and Michener, Joshua K. Modular Engineering of Biomass Degradation Pathways. United States: N. p., 2019. Web. doi:10.3390/pr7040230.
Chaves, Julie E., Presley, Gerald N., & Michener, Joshua K. Modular Engineering of Biomass Degradation Pathways. United States. https://doi.org/10.3390/pr7040230
Chaves, Julie E., Presley, Gerald N., and Michener, Joshua K. Mon . "Modular Engineering of Biomass Degradation Pathways". United States. https://doi.org/10.3390/pr7040230. https://www.osti.gov/servlets/purl/1523739.
@article{osti_1523739,
title = {Modular Engineering of Biomass Degradation Pathways},
author = {Chaves, Julie E. and Presley, Gerald N. and Michener, Joshua K.},
abstractNote = {Production of fuels and chemicals from renewable lignocellulosic feedstocks is a promising alternative to petroleum-derived compounds. Because of the complexity of lignocellulosic feedstocks, microbial conversion of all potential substrates will require substantial metabolic engineering. Non-model microbes offer desirable physiological traits, but also increase the difficulty of heterologous pathway engineering and optimization. The development of modular design principles that allow metabolic pathways to be used in a variety of novel microbes with minimal strain-specific optimization will enable the rapid construction of microbes for commercial production of biofuels and bioproducts. In this review, we discuss variability of lignocellulosic feedstocks, pathways for catabolism of lignocellulose-derived compounds, challenges to heterologous engineering of catabolic pathways, and opportunities to apply modular pathway design. Implementation of these approaches will simplify the process of modifying non-model microbes to convert diverse lignocellulosic feedstocks.},
doi = {10.3390/pr7040230},
journal = {Processes},
number = 4,
volume = 7,
place = {United States},
year = {Mon Apr 01 00:00:00 EDT 2019},
month = {Mon Apr 01 00:00:00 EDT 2019}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 8 works
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Figures / Tables:

Figure 1 Figure 1: Process diagram of lignocellulosic biofuel production. Plant biomass is pretreated to loosen the cell wall structure for enzymatic hydrolysis and the release of fermentable sugars from structural polysaccharides, such as cellulose. Sugars are then fermented into biofuels or other chemical products. Pretreatment, enzymatic hydrolysis, and fermentation can theoreticallymore » be performed together via consolidated bioprocessing using specialized microbes. Lignocellulose biorefining generates a ligninrich waste stream that can be depolymerized using a variety of techniques. Lignin depolymerization can alternatively occur prior to carbohydrate extraction using techniques such as reductive catalytic fractionation. Lignin depolymerization generates complex mixtures of lignin-derived monomers that can be microbially converted to value-added chemicals, thus increasing the value of these waste streams.« less

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Works referencing / citing this record:

Engineered Pseudomonas putida KT2440 co-utilizes galactose and glucose
journal, December 2019

  • Peabody, George L.; Elmore, Joshua R.; Martinez-Baird, Jessica
  • Biotechnology for Biofuels, Vol. 12, Issue 1
  • DOI: 10.1186/s13068-019-1627-0

Engineered Pseudomonas putida KT2440 co-utilizes galactose and glucose
journal, December 2019

  • Peabody, George L.; Elmore, Joshua R.; Martinez-Baird, Jessica
  • Biotechnology for Biofuels, Vol. 12, Issue 1
  • DOI: 10.1186/s13068-019-1627-0