Sequence variability is correlated with weak immunogenicity in Streptococcus pyogenes M protein

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Sequence variability is correlated with weak immunogenicity in Streptococcus pyogenes M protein

The M protein of Streptococcus pyogenes, a major bacterial virulence factor, has an amino-terminal hypervariable region (HVR) that is a target for type-specific protective antibodies. Intriguingly, the HVR elicits a weak antibody response, indicating that it escapes host immunity by two mechanisms, sequence variability and weak immunogenicity. However, the properties influencing the immunogenic...

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Extreme Sequence Divergence but Conserved Ligand-Binding Specificity in Streptococcus pyogenes M Protein

Many pathogenic microorganisms evade host immunity through extensive sequence variability in a protein region targeted by protective antibodies. In spite of the sequence variability, a variable region commonly retains an important ligand-binding function, reflected in the presence of a highly conserved sequence motif. Here, we analyze the limits of sequence divergence in a ligand-binding region...

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ژورنال

عنوان ژورنال: MicrobiologyOpen

سال: 2015

ISSN: 2045-8827,2045-8827

DOI: 10.1002/mbo3.278