A1 Refereed original research article in a scientific journal
Identification of a novel glycoprotein-binding activity in Streptococcus pyogenes regulated by the mga gene
Authors: Hytonen J, Haataja S, Isomaki P, Finne J
Publisher: MICROBIOLOGY SOC
Publication year: 2000
Journal: Microbiology
Journal name in source: MICROBIOLOGY-SGM
Journal acronym: MICROBIOL-SGM
Volume: 146
First page : 31
Last page: 39
Number of pages: 9
ISSN: 1350-0872
DOI: https://doi.org/10.1099/00221287-146-1-31
Abstract
The interaction between Streptococcus pyogenes and the host cell surface is not completely understood. Characterization of the adhesion mechanisms of the bacterium to the host cell surface is needed in order to develop new vaccines and anti-adhesion drugs. The presence of glycoprotein-binding activities among streptococcal strains was investigated. An activity binding to thyroglobulin, fetuin, asialofetuin and mucin but not non-glycosylated proteins was found to be present in the majority of the S. pyogenes strains studied. Cross-inhibition experiments suggested that the glycoproteins share a common structure recognized by the bacteria. The glycoprotein-binding activity was found to be proteinaceous, tightly attached to the bacterial surface and it also mediated the adherence of bacteria to solid surfaces coated with glycoproteins. The activity was found by transposon mutagenesis and complementation to be regulated by the multiple-gene regulator Mga. which has been implicated as a regulator of 5. pyogenes virulence factors.
The interaction between Streptococcus pyogenes and the host cell surface is not completely understood. Characterization of the adhesion mechanisms of the bacterium to the host cell surface is needed in order to develop new vaccines and anti-adhesion drugs. The presence of glycoprotein-binding activities among streptococcal strains was investigated. An activity binding to thyroglobulin, fetuin, asialofetuin and mucin but not non-glycosylated proteins was found to be present in the majority of the S. pyogenes strains studied. Cross-inhibition experiments suggested that the glycoproteins share a common structure recognized by the bacteria. The glycoprotein-binding activity was found to be proteinaceous, tightly attached to the bacterial surface and it also mediated the adherence of bacteria to solid surfaces coated with glycoproteins. The activity was found by transposon mutagenesis and complementation to be regulated by the multiple-gene regulator Mga. which has been implicated as a regulator of 5. pyogenes virulence factors.
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