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Introducing transglutaminase with its precursor region into Clostridium acetobutylicum improves its tolerance to oxidative stress and solvent production

Paper ID Volume ID Publish Year Pages File Format Full-Text
34479 45027 2015 8 PDF Available
Title
Introducing transglutaminase with its precursor region into Clostridium acetobutylicum improves its tolerance to oxidative stress and solvent production
Abstract

•Introducing MTG in C. acetobutylicum increased the aero-tolerance of the host.•The growth performance and solvent production of the host were improved.•It can be used to improve the physiological functionality for non-MTG-producing microorganisms.

We developed a new strategy to improve the aero-tolerance of Clostridium acetobutylicum, an obligate anaerobic bacterium widely used in solvent (acetone–butanol–ethanol) production. The gene mtg which encodes microbial transglutaminase mature protein and its precursor region (pro) were cloned from Streptomyces mobaraensis. Subsequently, the pro-mtg was introduced into C. acetobutylicum under the anhydrotetracycline inducible promoter Pcm-2tetO1 that we previously developed. Transglutaminase has been reported to be involved in oxidative stress in many human diseases. Here we found that the introduction of pro-mtg into C. acetobutylicum resulted in a significantly enhanced survival upon aeration and hydrogen peroxide challenges, as compared with the control. Penicillin susceptibility test indicated that the cross-linking activity of MTG might alter cell wall architecture and then improve the cellular resistance to oxidative stress. In addition, increased biomass concentration, reduced production of butyrate, as well as increased production of solvents by the recombinant C. acetobutylicum strain with pro-mtg, were also observed. Together with our previous observation that MTG improves the growth performance of Lactococcus lactis under aerobic conditions, introduction of MTG into non-MTG-producing microorganisms thus can be considered as a useful approach to improve the physiological functionality of the host microorganisms.

Keywords
Clostridium acetobutylicum; Microbial transglutaminase; Oxidative stress tolerance; Solvent production; Physiological functionality
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Introducing transglutaminase with its precursor region into Clostridium acetobutylicum improves its tolerance to oxidative stress and solvent production
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 50, Issue 1, January 2015, Pages 111–118
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us