Related Experiment Videos
Electrotransformation of Clostridium thermocellum
Michael V Tyurin1, Sunil G Desai, Lee R Lynd
1Thayer School of Engineering. Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire 03755, USA.
Applied and Environmental Microbiology
|February 10, 2004
Summary
Researchers developed an electrotransformation protocol for Clostridium thermocellum, enabling efficient gene transfer. This method facilitates genetic engineering in C. thermocellum for various molecular manipulations.
Area of Science:
- Microbiology
- Molecular Biology
- Biotechnology
Background:
- Clostridium thermocellum is an anaerobic bacterium relevant for biofuel production.
- Efficient genetic manipulation tools are crucial for advancing its biotechnological applications.
- Existing gene transfer methods for C. thermocellum are limited.
Purpose of the Study:
- To establish and optimize an electrotransformation protocol for Clostridium thermocellum.
- To enable efficient gene transfer for molecular manipulations in C. thermocellum.
- To improve transformation efficiencies in various C. thermocellum strains.
Main Methods:
- Electrotransformation using a custom-built pulse generator and plasmid pIKm1.
- Selection based on resistance to erythromycin and lincomycin.
- Optimization of incubation periods, chilling, isoniacin pre-treatment, and field strength.
Main Results:
- Achieved transformation efficiencies up to (2.2 +/- 0.5) x 10^5 transformants/µg DNA in strain DSM 1313.
- Successfully transformed strains DSM 1313, ATCC 27405, DSM 4150, and 7072 with varying efficiencies.
- Identified key factors for high transformation efficiency, including optimized pre- and post-pulse conditions.
Conclusions:
- A robust electrotransformation protocol for Clostridium thermocellum has been established.
- This method provides a functional gene transfer system for C. thermocellum.
- The protocol supports molecular manipulations like gene introduction and knockout in C. thermocellum.