Bacterial pathogens are a major risk to human, animal, and plant health. To counteract the spread of antibiotic resistance, alternative antibacterial strategies are urgently needed. Here, we construct a proof-of-concept customizable, modular, and inducible antibacterial toxin delivery platform. By engineering a type VI secretion system (T6SS) that is controlled by an externally induced on/off switch, we transform the safe bacterium, Vibrio natriegens, into an effective antibacterial weapon. Furthermore, we demonstrate that the delivered effector repertoire, and thus the toxicity range of this platform, can be easily manipulated and tested. We believe that this platform can serve as a foundation for novel antibacterial bio-treatments, as well as a unique tool to study antibacterial toxins.
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http://dx.doi.org/10.15252/embr.202153681 | DOI Listing |
Biotechnol Prog
December 2024
AVT - Biochemical Engineering, RWTH Aachen University, Aachen, Germany.
Erlenmeyer shake flasks are widely used during the first steps of bioprocess development. Despite their broad application in academia and industry, shake flasks usually lack standardized and user-friendly online monitoring techniques. In this work, the pH and Respiratory Activity MOnitoring System (pH-RAMOS) for the non-invasive online measurement of the oxygen transfer rate (OTR), carbon dioxide transfer rate (CTR), and pH in up to eight parallel shake flasks under sterile conditions is presented.
View Article and Find Full Text PDFACS Synth Biol
December 2024
CAS Key Laboratory of Urban Pollutant Conversion, Department of Environmental Science and Engineering, University of Science & Technology of China, Hefei 230026, China.
Bioproduction of chemicals by using engineered bacteria is promising for a circular economy but challenged the instability of the introduced plasmid by conventional methods. Here, we developed a two-plasmid INTEGRET system to reliably integrate the targeted gene into the genome, making it a powerful strain for efficient and steady bioproduction without requiring antibiotic addition. The INTEGRET system allows for gene insertion at over 75% inserting efficiency and flexibly controllable gene dosages.
View Article and Find Full Text PDFJ Biol Eng
November 2024
Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, MA, USA.
Adv Biochem Eng Biotechnol
November 2024
Microbial Biotechnology, Campus Straubing for Biotechnology and Sustainability, Technical University of Munich, Straubing, Germany.
The fast growth accompanied with high substrate consumption rates and a versatile metabolism paved the way to exploit Vibrio natriegens as unconventional host for biotechnological applications. Meanwhile, a wealth of knowledge on the physiology, the metabolism, and the regulation in this halophilic marine bacterium has been gathered. Sophisticated genetic engineering tools and metabolic models are available and have been applied to engineer production strains and first chassis variants of V.
View Article and Find Full Text PDFBioresour Technol
October 2023
Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China; State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin 300072, China. Electronic address:
Recently, clean PET biodegradation has gained widespread attention in tackling white pollution. Nonetheless, the development of industrial biotechnology is still impeded by its contamination susceptibility, high energy input, and consumption of substantial freshwater resources. Thus, a novel PET biodegradation process was developed based on host screening and by-product circulation to address the aforementioned issues.
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