Degradation studies on Escherichia coli capsular polysaccharides by bacteriophages
نویسندگان
چکیده
منابع مشابه
Recombinant expression of Streptococcus pneumoniae capsular polysaccharides in Escherichia coli
Currently, Streptococcus pneumoniae is responsible for over 14 million cases of pneumonia worldwide annually, and over 1 million deaths, the majority of them children. The major determinant for pathogenesis is a polysaccharide capsule that is variable and is used to distinguish strains based on their serotype. The capsule forms the basis of the pneumococcal polysaccharide vaccine (PPV23) that c...
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Highly purified capsular polysaccharides from groups A, B, and C meningococci and from two strains of Escherichia coli did not aggregate human or dog platelets in vitro. Nor was there any detectable effect on platelet aggregation induced by adenosine diphosphate (ADP), epinephrine, or collagen. The results do not support the hypothesis that capsular polysaccharides are involved in the pathogene...
متن کاملEffects of streptomycin and kanamycin on the production of capsular polysaccharides in Escherichia coli B23 cells
Aminoglycosides are a class of antibiotics that inhibit protein synthesis in bacteria by binding to the 30S ribosomal subunit. However, it has been reported that certain aminoglycosides have secondary effects on the cell’s overall carbohydrate concentration. Previous studies have also reported an increase in capsule size. This study attempted to investigate the effects of kanamycin and streptom...
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A gene library of genomic DNA Klebsiella aerogenes of capsular serotype K1 was constructed in E. coli LE392 using the cosmid pMMB33. Culture filtrates of E. coli recombinants were screened by ELISA for extracellular polysaccharides specific for K. aerogenes K1. Extracellular polysaccharide extracts from K. aerogenes K1 and 3% of the E. coli recombinants contained immunoprotective extracellular ...
متن کاملPolyacrylamide gel electrophoresis of the capsular polysaccharides of Escherichia coli K1 and other bacteria.
Methods were developed for the polyacrylamide gel electrophoretic analysis of capsular polysaccharides of bacteria with Escherichia coli K1 as a model. Conditions were determined for the rapid and gentle extraction of the K1 polysaccharide by incubation of the bacteria in a volatile buffer and for the subsequent removal of the putative phospholipid moiety attached to the reducing end of the pol...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 2006
ISSN: 0378-1097
DOI: 10.1111/j.1574-6968.1997.tb10470.x