In vivo synergistic activity of a CAZyme cassette from Acidothermus cellulolyticus significantly improves the cellulolytic activity of the C. bescii exoproteome
Abstract
The use of microbial cells to convert plant biomass directly to fuels and chemicals is referred to as consolidated bioprocessing (CBP). Members of the bacterial genus, Caldicellulosiruptor (Gram-positive, anaerobic hyperthermophiles) are capable of deconstructing plant biomass without enzymatic or chemical pretreatment. This is accomplished by the production and secretion of free, multi-domain enzymes that outperform commercial enzyme cocktails on some substrates. Here, we show that the exoproteome of C. bescii may be enhanced by the heterologous expression of enzymes from Acidothermus cellulolyticus that act synergistically to improve sugar release from complex substrates; as well as improve cell growth. In this work, co-expression of the A. cellulolyticus Acel_0615 ..beta..-glucanase (GH6 and GH12) and E1 endoglucanase (GH5) enzymes resulted in an increase in the activity of the exoproteome on Avicel; as well as an increase in growth of C. bescii on Avicel compared to the parental strain or the strain expressing the ..beta..-glucanase alone. As a result, our ability to engineer the composition and effectiveness of the exoproteome of these bacteria provides insight into the natural mechanism of plant cell wall deconstruction, as well as future directions for improving CBP.
- Authors:
-
- Univ. of Georgia, Athens, GA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Publication Date:
- Research Org.:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Biological and Environmental Research (BER)
- OSTI Identifier:
- 1395084
- Alternate Identifier(s):
- OSTI ID: 1373813
- Report Number(s):
- NREL/JA-2700-68934
Journal ID: ISSN 0006-3592
- Grant/Contract Number:
- AC36-08GO28308; AC05-00OR22725
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Biotechnology and Bioengineering
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 11; Journal ID: ISSN 0006-3592
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 09 BIOMASS FUELS; Caldicellulosiruptior; biomass deconstruction; consolidated bioprocessing; glucanase
Citation Formats
Kim, Sun -Ki, Chung, Daehwan, Himmel, Michael E., Bomble, Yannick J., and Westpheling, Janet. In vivo synergistic activity of a CAZyme cassette from Acidothermus cellulolyticus significantly improves the cellulolytic activity of the C. bescii exoproteome. United States: N. p., 2017.
Web. doi:10.1002/bit.26366.
Kim, Sun -Ki, Chung, Daehwan, Himmel, Michael E., Bomble, Yannick J., & Westpheling, Janet. In vivo synergistic activity of a CAZyme cassette from Acidothermus cellulolyticus significantly improves the cellulolytic activity of the C. bescii exoproteome. United States. https://doi.org/10.1002/bit.26366
Kim, Sun -Ki, Chung, Daehwan, Himmel, Michael E., Bomble, Yannick J., and Westpheling, Janet. 2017.
"In vivo synergistic activity of a CAZyme cassette from Acidothermus cellulolyticus significantly improves the cellulolytic activity of the C. bescii exoproteome". United States. https://doi.org/10.1002/bit.26366. https://www.osti.gov/servlets/purl/1395084.
@article{osti_1395084,
title = {In vivo synergistic activity of a CAZyme cassette from Acidothermus cellulolyticus significantly improves the cellulolytic activity of the C. bescii exoproteome},
author = {Kim, Sun -Ki and Chung, Daehwan and Himmel, Michael E. and Bomble, Yannick J. and Westpheling, Janet},
abstractNote = {The use of microbial cells to convert plant biomass directly to fuels and chemicals is referred to as consolidated bioprocessing (CBP). Members of the bacterial genus, Caldicellulosiruptor (Gram-positive, anaerobic hyperthermophiles) are capable of deconstructing plant biomass without enzymatic or chemical pretreatment. This is accomplished by the production and secretion of free, multi-domain enzymes that outperform commercial enzyme cocktails on some substrates. Here, we show that the exoproteome of C. bescii may be enhanced by the heterologous expression of enzymes from Acidothermus cellulolyticus that act synergistically to improve sugar release from complex substrates; as well as improve cell growth. In this work, co-expression of the A. cellulolyticus Acel_0615 ..beta..-glucanase (GH6 and GH12) and E1 endoglucanase (GH5) enzymes resulted in an increase in the activity of the exoproteome on Avicel; as well as an increase in growth of C. bescii on Avicel compared to the parental strain or the strain expressing the ..beta..-glucanase alone. As a result, our ability to engineer the composition and effectiveness of the exoproteome of these bacteria provides insight into the natural mechanism of plant cell wall deconstruction, as well as future directions for improving CBP.},
doi = {10.1002/bit.26366},
url = {https://www.osti.gov/biblio/1395084},
journal = {Biotechnology and Bioengineering},
issn = {0006-3592},
number = 11,
volume = 114,
place = {United States},
year = {Mon Jun 26 00:00:00 EDT 2017},
month = {Mon Jun 26 00:00:00 EDT 2017}
}
Web of Science
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