Related Experiment Videos
Bacteriocinlike Activity within the Genus Thermus.
R J Becker1, D A Becker, M J Starzyk
1Molecular and Microbiological Section, Department of Biological Sciences, Northern Illinois University, DeKalb, Illinois 60115.
Applied and Environmental Microbiology
|November 1, 1986
Summary
Thermus rubens produces bacteriocinlike inhibitory activity against other Thermus strains. This thermophilic bacterium possesses a 64-megadalton plasmid, potentially linked to its antagonistic capabilities.
Area of Science:
- Microbiology
- Bacteriology
- Extremophile Research
Background:
- The genus Thermus comprises thermophilic bacteria found in various high-temperature environments.
- Bacteriocinlike inhibitory substances (BLIS) are antimicrobial peptides produced by bacteria that can inhibit the growth of closely related species.
- Investigating antimicrobial activities within microbial genera can reveal novel bioactive compounds and ecological interactions.
Purpose of the Study:
- To screen members of the genus Thermus for bacteriocinlike inhibitory activity.
- To identify specific Thermus species exhibiting antagonistic properties against other strains within the genus.
- To analyze the genetic basis, specifically plasmid content, of any observed inhibitory activity.
Main Methods:
- The deferred antagonism technique was employed to assess inhibitory activity.
- Zones of inhibition were measured to quantify antagonistic effects.
- Plasmid DNA was extracted and analyzed from the inhibitory strain.
Main Results:
- Thermus rubens demonstrated significant antagonistic activity against all other tested Thermus strains.
- Thermus rubens was found to be immune to its own inhibitory effect.
- Plasmid analysis of T. rubens identified a single plasmid of approximately 64 megadaltons.
Conclusions:
- Thermus rubens produces a bacteriocinlike substance effective against other Thermus species.
- The identified plasmid in T. rubens may be responsible for the production of or immunity to the bacteriocinlike activity.
- This finding contributes to understanding inter-bacterial interactions within the genus Thermus.