Xylose induces cellulase production in Thermoascus aurantiacus
Abstract
Lignocellulosic biomass is an important resource for renewable production of biofuels and bioproducts. Enzymes that deconstruct this biomass are critical for the viability of biomass-based biofuel production processes. Current commercial enzyme mixtures have limited thermotolerance. Thermophilic fungi may provide enzyme mixtures with greater thermal stability leading to more robust processes. Understanding the induction of biomass-deconstructing enzymes in thermophilic fungi will provide the foundation for strategies to construct hyper-production strains. Induction of cellulases using xylan was demonstrated during cultivation of the thermophilic fungus Thermoascus aurantiacus. Simulated fed-batch conditions with xylose induced comparable levels of cellulases. These fed-batch conditions were adapted to produce enzymes in 2 and 19 L bioreactors using xylose and xylose-rich hydrolysate from dilute acid pretreatment of corn stover. Enzymes from T. aurantiacus that were produced in the xylose-fed bioreactor demonstrated comparable performance in the saccharification of deacetylated, dilute acid-pretreated corn stover when compared to a commercial enzyme mixture at 50 °C. The T. aurantiacus enzymes retained this activity at of 60 °C while the commercial enzyme mixture was largely inactivated. CXylose induces both cellulase and xylanase production in T. aurantiacus and was used to produce enzymes at up to the 19 L bioreactor scale. The demonstration of inductionmore »
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1618701
- Alternate Identifier(s):
- OSTI ID: 1419444
- Grant/Contract Number:
- 2.2.3.103; AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Biotechnology for Biofuels
- Additional Journal Information:
- Journal Name: Biotechnology for Biofuels Journal Volume: 10 Journal Issue: 1; Journal ID: ISSN 1754-6834
- Publisher:
- Springer Science + Business Media
- Country of Publication:
- Netherlands
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES; Thermoascus aurantiacus; Xylose; Cellulases; Corn stover; Bioprocess; Thermophile; Filamentous fungi
Citation Formats
Schuerg, Timo, Prahl, Jan-Philip, Gabriel, Raphael, Harth, Simon, Tachea, Firehiwot, Chen, Chyi-Shin, Miller, Matthew, Masson, Fabrice, He, Qian, Brown, Sarah, Mirshiaghi, Mona, Liang, Ling, Tom, Lauren M., Tanjore, Deepti, Sun, Ning, Pray, Todd R., and Singer, Steven W. Xylose induces cellulase production in Thermoascus aurantiacus. Netherlands: N. p., 2017.
Web. doi:10.1186/s13068-017-0965-z.
Schuerg, Timo, Prahl, Jan-Philip, Gabriel, Raphael, Harth, Simon, Tachea, Firehiwot, Chen, Chyi-Shin, Miller, Matthew, Masson, Fabrice, He, Qian, Brown, Sarah, Mirshiaghi, Mona, Liang, Ling, Tom, Lauren M., Tanjore, Deepti, Sun, Ning, Pray, Todd R., & Singer, Steven W. Xylose induces cellulase production in Thermoascus aurantiacus. Netherlands. https://doi.org/10.1186/s13068-017-0965-z
Schuerg, Timo, Prahl, Jan-Philip, Gabriel, Raphael, Harth, Simon, Tachea, Firehiwot, Chen, Chyi-Shin, Miller, Matthew, Masson, Fabrice, He, Qian, Brown, Sarah, Mirshiaghi, Mona, Liang, Ling, Tom, Lauren M., Tanjore, Deepti, Sun, Ning, Pray, Todd R., and Singer, Steven W. Wed .
"Xylose induces cellulase production in Thermoascus aurantiacus". Netherlands. https://doi.org/10.1186/s13068-017-0965-z.
@article{osti_1618701,
title = {Xylose induces cellulase production in Thermoascus aurantiacus},
author = {Schuerg, Timo and Prahl, Jan-Philip and Gabriel, Raphael and Harth, Simon and Tachea, Firehiwot and Chen, Chyi-Shin and Miller, Matthew and Masson, Fabrice and He, Qian and Brown, Sarah and Mirshiaghi, Mona and Liang, Ling and Tom, Lauren M. and Tanjore, Deepti and Sun, Ning and Pray, Todd R. and Singer, Steven W.},
abstractNote = {Lignocellulosic biomass is an important resource for renewable production of biofuels and bioproducts. Enzymes that deconstruct this biomass are critical for the viability of biomass-based biofuel production processes. Current commercial enzyme mixtures have limited thermotolerance. Thermophilic fungi may provide enzyme mixtures with greater thermal stability leading to more robust processes. Understanding the induction of biomass-deconstructing enzymes in thermophilic fungi will provide the foundation for strategies to construct hyper-production strains. Induction of cellulases using xylan was demonstrated during cultivation of the thermophilic fungus Thermoascus aurantiacus. Simulated fed-batch conditions with xylose induced comparable levels of cellulases. These fed-batch conditions were adapted to produce enzymes in 2 and 19 L bioreactors using xylose and xylose-rich hydrolysate from dilute acid pretreatment of corn stover. Enzymes from T. aurantiacus that were produced in the xylose-fed bioreactor demonstrated comparable performance in the saccharification of deacetylated, dilute acid-pretreated corn stover when compared to a commercial enzyme mixture at 50 °C. The T. aurantiacus enzymes retained this activity at of 60 °C while the commercial enzyme mixture was largely inactivated. CXylose induces both cellulase and xylanase production in T. aurantiacus and was used to produce enzymes at up to the 19 L bioreactor scale. The demonstration of induction by xylose-rich hydrolysate and saccharification of deacetylated, dilute acid-pretreated corn stover suggests a scenario to couple biomass pretreatment with onsite enzyme production in a biorefinery. This work further demonstrates the potential for T. aurantiacus as a thermophilic platform for cellulase development.},
doi = {10.1186/s13068-017-0965-z},
journal = {Biotechnology for Biofuels},
number = 1,
volume = 10,
place = {Netherlands},
year = {Wed Nov 15 00:00:00 EST 2017},
month = {Wed Nov 15 00:00:00 EST 2017}
}
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https://doi.org/10.1186/s13068-017-0965-z
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Works referencing / citing this record:
Cellulase and xylanase synergism in industrial biotechnology
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