Mode of action of lactococcin B, a thiol-activated bacteriocin from Lactococcus lactis

Article Abstract:

Changes in the membrane potential, acidity gradient and amino acid uptake and efflux in the cells of Lactococcus lactis due to a purified lactococcin B (LcnB) bacteriocin is discussed. Measurements of membrane potential and intracellular acidity were determined by tetraphenylphosphonium-selective electrode and spectrofluorometry, respectively. Results indicate the presence of LcnB immune cells.

Bacterial genetics, Lactic acid

---

Purification and characterization of a novel NADP-dependent branched-chain alcohol dehydrogenase from Saccharomyces cerevisiae

Article Abstract:

A novel NADP-dependent branched-chain alcohol dehydrogenase was isolated from Saccharomyces cerevisiae var uvarum developed in an anaerobic environment. Characterization of the alcohol dehydrogenase reveals that it has a monomeric quaternary structure, a 5.9 pI and a 37 kDa molecular mass. Results indicate that the enzyme may be used in making food flavorings during alcoholic fermentation.

Enzymes, Saccharomyces, Alcohol dehydrogenase, Alcohol dehydrogenases

---

Germination of Bacillus cereus spores is induced by germinants for differentiated caco-2 cells, a human cell line mimicking the epithelial cells of the small intestine

Article Abstract:

The germination induction upon adhesion to caco-2 cells in 11 enterotoxigenic strains of Bacillus cereus was investigated. It was found that spores of the 11 strains of Bacillus cereus adhered with similar efficiencies to Caco-2 cells, Hep-2 cells did not trigger germination and spores of all strains displayed similar germination efficiencies.

Analysis, Physiological aspects, Germination, Bacillus cereus

Similar abstracts:

• Abstracts: Role of calcium in activity and stability of the Lactococcus lactis cell envelope proteinase. Molecular and functional analyses of the metC gene of Lactococcus lactis, encoding cystathionine beta-lyase
• Abstracts: Conversion of phenylalanine to benzaldehyde initiated by an aminotransferase in Lactobacillus plantarum. Application of p-toluidine in chromogenic detection of catechol and protocatechuate, diphenolic intermediates in catabolism of aromatic compounds
• Abstracts: Determination of plasmid DNA concentration maintained by nonculturable Escherichia coli in marine microcosms. Direct extraction of bacterial plasmids from food for polymerase chain reaction amplification
• Abstracts: Characterization of the chemical and antimicrobial properties of piscicolin 126, a bacteriocin produced by Carnobacterium piscicola JG126
• Abstracts: Effect of compatible solutes on survival of lactic acid bacteria subjected to drying. Metabolism of tetralin (1,2,3,4-tetrahydronapthalene) in Corynebacterium sp.strain C125

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.