Engineering recombinant microbial communities for cellulose degradation and utilization

Authors
Kalbarczyk, Karolina Zbigniew
ORCID
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Other Contributors
Collins, Cynthia H.
Koffas, Mattheos A. G.
Tessier, Peter M.
Barquera, Blanca L.
Issue Date
2018-08
Keywords
Chemical engineering
Degree
PhD
Terms of Use
This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute, Troy, NY. Copyright of original work retained by author.
Full Citation
Abstract
Cellulase activity against amorphous cellulose was confirmed, and the most active SP constructs were identified as EGI1 with the LipA SP and Cel9AT with the YngK SP. Both strains were optimized for cellulase expression, and activity of the enzymes was characterized individually and in tandem to demonstrate synergistic cellulolytic activity in coculture. The secreted cellulases were reacted with amorphous cellulose under a range of different conditions, and the resulting glucose supported the growth of the second target module, an E. coli strain to be used for production of violacein, an antimicrobial pharmaceutical product with anti-tumor properties. A series of studies investigated the compatibility of the two modules and the cellulose degradation reaction. The construction of a two-module system for efficient cellulose degradation and utilization demonstrated the value of the modular system design, to allow bacterial strains to be interchanged or linked with other engineered bacterial strains for the efficient production of high value molecules.
Description
August 2018
School of Engineering
Department
Dept. of Chemical and Biological Engineering
Publisher
Rensselaer Polytechnic Institute, Troy, NY
Relationships
Rensselaer Theses and Dissertations Online Collection
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