The aim of this study was to compare invasive and non-invasive strains of Shigella flexneri isolated from Tehran by a 120 kDa protein band by SDS-PAGE, electron microscopy of cell culture and Congo red dye methods. Methods: S. flexneri strains were isolated by standard bacterial methods from fecal specimens of children attending to the 3 children’s hospitals. Phenotype analysis for screening v...

conclusions over-expression of the synthetic cpc/β protein in the bacterial system (escherichia coli bl-21) showed that e. coli can be used as a basis for further research to produce this desired protein in large quantities. results the sds-page analysis and dot blotting confirmed the production of recombinant c-pc/β in the bacterial expression system. over-expression of cpcb gene was optimized...

Objective(s): Streptococcus pyogenes produces extracellular hyaluronidase enzyme. This enzyme is directly associated with the spread of the organism during infection. The objective of the present study was to clone and express the nucleotide sequence of the enzyme which is involved in hyaluronidase enzymatic activity. Materials and Methods: The enzymatic region of hyaluronidase gene was detecte...

Bacterial meningitis in the African meningitis belt remains 1 of the most serious threats to health. The perceptions regarding meningitis in local populations and the cost of illness for households are not well described. We conducted an anthropologic and economic study in Burkina Faso, in the heart of the meningitis belt. Respondents reported combining traditional and modern beliefs regarding ...

The aim of this study was to produce fish protein concentrate from marine Cynoglossus bilineatus, the brought local Basrah market and dried in oven at 025 °C for 06 h. chemical composition were 48.62 % (N×6.25), 19.49 fat 19.95 ash, while processed 79.56 6.38 9.51 ash. obtain yield 67.58 fish. product characterized with light brown acceptable fishy smell, also showed good strong stability after...

Reversible protein acetylation is a ubiquitous means for the rapid control of diverse cellular processes. Acetyltransferase enzymes transfer the acetyl group from acetyl-CoA to lysine residues, while deacetylase enzymes catalyze removal of the acetyl group by hydrolysis or by an NAD(+)-dependent reaction. Propionyl-coenzyme A (CoA), like acetyl-CoA, is a high energy product of fatty acid metabo...

The oxidative cleavage of heme to release iron is a mechanism by which some bacterial pathogens can utilize heme as an iron source. The pigA gene of Pseudomonas aeruginosa is shown to encode a heme oxygenase protein, which was identified in the genome sequence by its significant homology (37%) with HemO of Neisseria meningitidis. When the gene encoding the neisserial heme oxygenase, hemO, was r...

Bacteria and Eukarya share essentially the same family of protein-serine/threonine kinases, also known as the Hanks-type kinases. However, when it comes to protein-tyrosine phosphorylation, bacteria seem to have gone their own way. Bacterial protein-tyrosine kinases (BY-kinases) are bacterial enzymes that are unique in exploiting the ATP/GTPbinding Walker motif to catalyze phosphorylation of pr...

4-Nitroquinoline 1-oxide (4NQO) damages bacterial genomes but not phage genomes. A reduction product of 4NQO, 4-hydroxyaminoquinoline 1-oxide (4HAQO), damages both the bacterial and phage genomes. These results imply that Salmonella typhimurium is able to convert 4NQO to 4HAQO and that 4HAQO reacts with the genomes. When phage P22 is treated with 4HAQO and assayed on S. typhimurium strains lyso...