Characterization of bacteriocins from two strains of Bacillus thermoleovorans, a thermophilic hydrocarbon-utilizing species

Article Abstract:

Bacillus thermoleovorans strains S-II and NR-9 produce bacteriocins named thermoleovorin-S2 and -N9, respectively. These appear to be proteins since activity was inhibited by proteinases. Both inhibited all strains of B. thermoleovorans except the producing strain and showed activity against Salmonella typhimurium, Streptococcus faecalis and Branhamella catarrhalis. Thermoleovorin-N9 acts in the early log phase, affecting rapidly dividing cells, while thermoleovorin-S2 lyses cells over most of the cell cycle with greatest activity at the log phase.

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Vegetable-associated Pediococcus parvulus produces pediocin PA-1

Article Abstract:

The pediocin PA gene was detected by recombinant DNA techniques from bacteriocin-producing strains of Pediococcus parvulus which were isolated from minimally processed vegetables. Bacteriocins produced by Pediococcus parvulus ATO34 and ATO77 strains exhibited physicochemical properties that are similar to the single peptide, pediocin PA-1. Furthermore, the Pediococcus parvulus strains adapted to the vegetable environment and they were able to grow at low temperatures.

Bacteria

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Biodegradation and biotransformation of groundwater pollutant mixtures by Mycobacterium vaccae

Article Abstract:

The catabolization of some major groundwater pollutants by Mycobacterium vaccae is discussed. Gas chromatographic analysis was used to monitor the catabolism of acetone, cyclohexane, styrene, benzene, ethylbenzene, propylbenzene, dioxane and 1,2-dichloroethylene by M. vaccae. It was found that the biodegradation rates of pollutants are either positively or negatively affected by the components of the degradation products.

Genetic aspects, Biodegradation, Aquatic microbiology, Mycobacterium, Water, Underground, Groundwater, Pollutants

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