Conversion of levoglucosan and cellobiosan by Pseudomonas putida KT2440
Abstract
Pyrolysis offers a straightforward approach for the deconstruction of plant cell wall polymers into bio-oil. Recently, there has been substantial interest in bio-oil fractionation and subsequent use of biological approaches to selectively upgrade some of the resulting fractions. A fraction of particular interest for biological upgrading consists of polysaccharide-derived substrates including sugars and sugar dehydration products such as levoglucosan and cellobiosan, which are two of the most abundant pyrolysis products of cellulose. Levoglucosan can be converted to glucose-6-phosphate through the use of a levoglucosan kinase (LGK), but to date, the mechanism for cellobiosan utilization has not been demonstrated. Here, we engineer the microbe Pseudomonas putida KT2440 to use levoglucosan as a sole carbon and energy source through LGK integration. Furthermore, we demonstrate that cellobiosan can be enzymatically converted to levoglucosan and glucose with β-glucosidase enzymes from both Glycoside Hydrolase Family 1 and Family 3. β-glucosidases are commonly used in both natural and industrial cellulase cocktails to convert cellobiose to glucose to relieve cellulase product inhibition and to facilitate microbial uptake of glucose. Using an exogenous β-glucosidase, we demonstrate that the engineered strain of P. putida can grow on levoglucosan up to 60 g/L and can also utilize cellobiosan. Overall, thismore »
- Authors:
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office
- OSTI Identifier:
- 1433726
- Alternate Identifier(s):
- OSTI ID: 1240242
- Report Number(s):
- NREL/JA-5100-65971
Journal ID: ISSN 2214-0301; S2214030116300050; PII: S2214030116300050
- Grant/Contract Number:
- AC36-08GO28308
- Resource Type:
- Published Article
- Journal Name:
- Metabolic Engineering Communications
- Additional Journal Information:
- Journal Name: Metabolic Engineering Communications Journal Volume: 3 Journal Issue: C; Journal ID: ISSN 2214-0301
- Publisher:
- Elsevier
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANAYLYTICAL CHEMISTRY; Pseudomonas putida KT2440; levoglucosan kinase; B-glucosidase; cellobiosan; pyrolysis; biofuels
Citation Formats
Linger, Jeffrey G., Hobdey, Sarah E., Franden, Mary Ann, Fulk, Emily M., and Beckham, Gregg T. Conversion of levoglucosan and cellobiosan by Pseudomonas putida KT2440. Netherlands: N. p., 2016.
Web. doi:10.1016/j.meteno.2016.01.005.
Linger, Jeffrey G., Hobdey, Sarah E., Franden, Mary Ann, Fulk, Emily M., & Beckham, Gregg T. Conversion of levoglucosan and cellobiosan by Pseudomonas putida KT2440. Netherlands. https://doi.org/10.1016/j.meteno.2016.01.005
Linger, Jeffrey G., Hobdey, Sarah E., Franden, Mary Ann, Fulk, Emily M., and Beckham, Gregg T. Thu .
"Conversion of levoglucosan and cellobiosan by Pseudomonas putida KT2440". Netherlands. https://doi.org/10.1016/j.meteno.2016.01.005.
@article{osti_1433726,
title = {Conversion of levoglucosan and cellobiosan by Pseudomonas putida KT2440},
author = {Linger, Jeffrey G. and Hobdey, Sarah E. and Franden, Mary Ann and Fulk, Emily M. and Beckham, Gregg T.},
abstractNote = {Pyrolysis offers a straightforward approach for the deconstruction of plant cell wall polymers into bio-oil. Recently, there has been substantial interest in bio-oil fractionation and subsequent use of biological approaches to selectively upgrade some of the resulting fractions. A fraction of particular interest for biological upgrading consists of polysaccharide-derived substrates including sugars and sugar dehydration products such as levoglucosan and cellobiosan, which are two of the most abundant pyrolysis products of cellulose. Levoglucosan can be converted to glucose-6-phosphate through the use of a levoglucosan kinase (LGK), but to date, the mechanism for cellobiosan utilization has not been demonstrated. Here, we engineer the microbe Pseudomonas putida KT2440 to use levoglucosan as a sole carbon and energy source through LGK integration. Furthermore, we demonstrate that cellobiosan can be enzymatically converted to levoglucosan and glucose with β-glucosidase enzymes from both Glycoside Hydrolase Family 1 and Family 3. β-glucosidases are commonly used in both natural and industrial cellulase cocktails to convert cellobiose to glucose to relieve cellulase product inhibition and to facilitate microbial uptake of glucose. Using an exogenous β-glucosidase, we demonstrate that the engineered strain of P. putida can grow on levoglucosan up to 60 g/L and can also utilize cellobiosan. Overall, this study elucidates the biological pathway to co-utilize levoglucosan and cellobiosan, which will be a key transformation for the biological upgrading of pyrolysis-derived substrates.},
doi = {10.1016/j.meteno.2016.01.005},
journal = {Metabolic Engineering Communications},
number = C,
volume = 3,
place = {Netherlands},
year = {Thu Dec 01 00:00:00 EST 2016},
month = {Thu Dec 01 00:00:00 EST 2016}
}
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https://doi.org/10.1016/j.meteno.2016.01.005
https://doi.org/10.1016/j.meteno.2016.01.005
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