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The article discusses purification and characterization of enterocins produced by Enterococcus faecium bacterial species. It reports that the culture supernatant of Enterococcus faecium NKR-5-3 strain produces four peptides that are referred to as NKR-5-3A, B, C and D. It mentions different antimicrobial spectra and intensities of the enterocins produced including antimicrobial spectrum of NKR-5-3B and protective effect of NKR-5-3C against Listeria infections.

The article presents research on the effects of negatively charged lipids on the pore formation and binding of membrane-lacticin Q with liposomes. It says that the effects were investigated through surface plasmon resonance analysis and fluorescence dye leakage experiments. The results suggest that the charged lipids accelerated the binding and pore formation of lacticin Q on the membranes, but the acceleration was not a factor in the killing activity of lacticin Q.

The article presents a study that identifies a variant of nukacin ISK-1, a type -A (II) lantibiotic, in Staphylococcus hominis KQU-131 that was isolated from Thai fermented marine fish. It discusses about bacteriocins which are grouped in three major classes, Thailand's various fermented foods such as fermented fish pork and vegetables, as well as lactic and halophilic bacteria found in these products. Details on the findings that shows the amino acid and lysine residue are also offered.

The article presents a study that demonstrates the complete covalent structure of nisin Q, which consists of 34 amino acids, through a two-dimensional nuclear magnetic resonance (NMR) spectroscopy. Nisin Q, is the third member of the nisin variant, developed by Lactococcus lactis 61-14. Moreover, the sequential assignment of nisin Q comprising of the unusual amino acids was performed through total correlation spectroscopy (TOCSY) and nuclear overhauser enhancement spectroscopy (NOESY).

The article reports on results of a study which compares the function of DnaK chaperone systems from halophilic lactic acid bacterium Tetragenococcus halophilus and Escherichia coli. A description of the study design and method is presented. The study concluded that Escherichia coli DnaK cross-reacted with those from both bacteria.

The article discusses a study of the differences in developing intestinal microorganisms in the first two months of allergic and non-allergic infants born in Japan. The bacterial composition of the feces of the infants were monitored. The population of infants with Bacteroidaceae was higher in the allergic group.. There was no significant difference observed in the other bacterial populations.

The article reports on the results of a study of the characterization and structure of a novel bacteriocin, lacticin Z, produced by Lactococcus lactis QU 14. A description of the experimental setup and measurement method is presented. The study showed that the stability of lacticin Z was emphasized under alkaline conditions rather than acidic conditions.

Examines the characteristics and localization of the immunity protein NukH for the lantibiotic nukacin ISK-1. Production of nukacin ISK-1 bacteriocins by Staphylococcus warneri ISK-1; Localization of NukH in the cellular membrane; Degree of immunity of NukH; Target specificity of the immunity system with other lantibiotics.

Examines the characteristics of NukM and NukT, biosynthetic proteins for the lantibiotic nukacin ISK-1. Production of nukacin by Staphylococcus warneri; Involvement of the proteins in the modification of prepeptide, cleavage of leader peptide and subsequent secretion; Localization of the proteins at the cytoplasm membrane; Formation of a membrane-located multimeric protein complex; Post-translational modification of nukacin ISK-1 bacteriocins at the cytoplasm membrane.

Describes the molecular monitoring of the developmental bacterial community in the gastrointestinal tract of Japanese neonates. Isolation of DNA from the fecal samples; PCR-denaturing gradient gel electrophoresis profiles of the subjects; Pattern of aerobe and anaerobe appearance in the infants.

Characterizes a gene cluster in a plasmid designated pPI-1 of Staphylococcus warneri ISK-1 encoding the biosynthesis of and immunity to the lacticin-481 type lantibiotic, nukacin ISK-1. Transcriptional levels of the nukA and nukM genes; Osmotic stress; Presence of unusual amino acids.

Characterizes the bacteriocin, nisin Q from the bacteria Lactococcus lactis. Bacterial strain; Isolation of the bacteria from a river in Japan; Comparison of nisin Q with nisin variants A and Z; Amino acid sequence alignment; Molecular mass; Chemical structure; Antibacterial activity.

The article discusses the role of Enterococcus (E.) faecium NKR-5-3 in the identification of NKR-5-3C Enterocin bacteriocin. It says that mass spectral analysis and purification has revealed the ability of E. faecium to produce bacteriocin-like peptides. It adds that NKR-5-3C contains two disulfide bridges and YGNGL motif sequence in its structure.