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Revised Model for Enterococcus faecalis fsr Quorum-Sensing System: the Small Open Reading Frame fsrD Encodes the Gelatinase Biosynthesis-Activating Pheromone Propeptide Corresponding to
TLDR
It was demonstrated that FsrB', an FsrD segment-truncated FSRB, functions as a cysteine protease-like processing enzyme to generate GBAP from F srB, and this revised model is consistent with the staphylococcal agr system.
A common system controls the induction of very different genes. The class-A beta-lactamase of Proteus vulgaris and the enterobacterial class-C beta-lactamase.
TLDR
Cloned genes ampD and ampG for negative modulation and signal transduction of AmpC beta-lactamase induction were able to restore constitutively CumA overproducing and non-inducible P. vulgaris mutants to the inducible, wild-type phenotype.
Studies on uricase induction in certain bacteria
TLDR
The uricase was present as cell-bound enzyme in the producing organisms and no activity was recorded in the culture supernatants, and uric acid was the most potent inducer.
Studies on diseased freshwater prawn Macrobrachium rosenbergii infected with Vibrio vulnificus.
TLDR
The present study was aimed at isolation and characterization of the pathogenic bacterium from diseased freshwater prawn and the isolated pathogen was characterized as Vibrio vulnificus, which showed different degrees of sensitivity to different antimicrobial agents.
Substrate recognition mechanism of prolyl aminopeptidase from Serratia marcescens.
TLDR
To elucidate the details of the mechanism for the substrate specificity, the site-directed mutagenesis method was applied and it was clarified that the pyrrolidine ring and the amino group of proline at the S1 site were recognized by Phe139 and Glu204, respectively.
A common system controls the induction of very different genes. The class-A beta-lactamase of Proteus vulgaris and the enterobacterial class-C beta-lactamase.
TLDR
Cloned genes ampD and ampG for negative modulation and signal transduction of AmpC beta-lactamase induction were able to restore constitutively CumA overproducing and non-inducible P. vulgaris mutants to the inducible, wild-type phenotype.
Studies on bacterioplankton and inhibitory strains of aquatic actinomycetes in Lake Bardawil, Egypt
TLDR
The most antibacterially active isolate was subjected to morphological, physiological and biochemical studies and identified as Streptomycesviridiviolaceus, which exhibited antimicrobial activities against the main indicator of water pollution, E. coli.
Determination of the Bacteriocin-like Substances Produced By Enterococcus hirae Isolated from Traditional Egyptian Food (Koskos)
TLDR
The SDS-PAGE analysis was indicated that bacteriocin of E. hirae is a two peptides of approximately 42 and 52 kDa, and had a negative effect on the respiration, where the amount of consumed oxygen decreased by increasing the bacteriOCins.
Influence of Nano-bodies produced from Gram-negative Bacteria against infection with Pseudomonas Aeruginosa induced Bronchial Pneumonia with special references to their effect on Immune system in
TLDR
It is proved that Nano bodies or membrane vesicles from Erwinia cartovora and Proteus vulgaris could enhance the immune response of animals and gave the protection against pseudomonas aeruginosa induced Bronchial Pneumonia.
Bacteriocins-Like Substances Produced by Enterococcus sanguinicola Isolated from Traditional Egyptian Food Sires (Chichorium pumilum)
TLDR
The isolated organism was screened for their antimicrobial activities against different microbial indicators bacteria and found that bacteriocin of E. sanguinicola had a negative effect on the respiration, where the amount of consumed oxygen decreased by increasing the bacteriOCins.
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