SIC, a Secreted Protein of Streptococcus pyogenesThat Inactivates Antibacterial Peptides

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SIC, a secreted protein of Streptococcus pyogenes that inactivates antibacterial peptides.

Some isolates of the significant human pathogen Streptococcus pyogenes, including virulent strains of the M1 serotype, secrete protein SIC. This molecule, secreted in large quantities, interferes with complement function. As a result of natural selection, SIC shows a high degree of variation. Here we provide a plausible explanation for this variation and the fact that strains of the M1 serotype...

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Recent studies have shown that activation of complement and contact systems results in the generation of antibacterial peptides. Streptococcus pyogenes, a major bacterial pathogen in humans, exists in >100 different serotypes due to sequence variation in the surface-associated M protein. Cases of invasive and life-threatening S. pyogenes infections are commonly associated with isolates of the M...

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ژورنال

عنوان ژورنال: Journal of Biological Chemistry

سال: 2003

ISSN: 0021-9258

DOI: 10.1074/jbc.m301995200