Escherichia coli capsule bacteriophages. IV. Free capsule depolymerase 29
نویسندگان
چکیده
منابع مشابه
Escherichia coli capsule bacteriophages. II. Morphology.
The Escherichia coli capsule bacteriophages (K phages) described herein are specific for certain capsular strains of E. coli, all of them test strains for different E. coli K antigens. The phages are not adsorbed to the acapsular mutants of their host organisms nor to similar strains with serologically and chemically different capsular polysaccharides. Thirteen E. coli (and one Klebsiella) K ph...
متن کاملTreatment of experimental Escherichia coli infection with recombinant bacteriophage-derived capsule depolymerase.
OBJECTIVES The aim of this study was to investigate the effect of single doses of the capsule depolymerizing enzyme endosialidase E (endoE) on the course of systemic infection due to Escherichia coli K1 strains in neonatal rats. We also determined the capacity of the enzyme to increase the sensitivity of K1 strains to rat peritoneal macrophages. METHODS Bacteraemia was established in Wistar r...
متن کاملCapsule depolymerase overexpression reduces Bacillus anthracis virulence.
Capsule depolymerase (CapD) is a gamma-glutamyl transpeptidase and a product of the Bacillus anthracis capsule biosynthesis operon. In this study, we examined the effect of modulating capD expression on B. anthracis capsule phenotype, interaction with phagocytic cells and virulence in guinea pigs. Transcriptional fusions of capD were made to the genes encoding heat-shock protein 60 (hsp60) and ...
متن کاملTreatment of experimental anthrax with recombinant capsule depolymerase.
Bacillus anthracis produces an antiphagocytic gamma-linked poly-D-glutamic acid capsule that is required for virulence. Capsule depolymerase (CapD) is a membrane-associated poly-gamma-glutamate-specific depolymerase encoded on the B. anthracis capsule plasmid, pX02, that is reported to contribute to virulence by anchoring the capsule to the peptidoglycan and partially degrading high-molecular-w...
متن کاملDNA probes for K-antigen (capsule) typing of Escherichia coli.
DNA restriction fragments derived from the polysaccharide biosynthesis regions of cloned Escherichia coli K1, K5, and K12 capsular antigen genes hybridized only with DNA of strains determined by conventional methods to be of the same K serotype. A probe derived from the common transport region hybridized to all encapsulated E. coli strains.
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ژورنال
عنوان ژورنال: Journal of Virology
سال: 1975
ISSN: 0022-538X,1098-5514
DOI: 10.1128/jvi.15.4.976-984.1975