How M Proteins and Lipoteichoic Acid Affect Hydrophobicity and Biofilm Formation in Streptococcus pyogenes
Author Information
Author(s): Courtney Harry S., Itzhak Ofek, Thomas Penfound, Victor Nizet, Morgan A. Pence, Bernd Kreikemeyer, Andreas Podbielski, David L. Hasty, James B. Dale
Primary Institution: University of Tennessee, Memphis, Tennessee, United States of America
Hypothesis
Are members of the M protein family involved in anchoring lipoteichoic acid (LTA) to contribute to hydrophobicity and biofilm formation in Streptococcus pyogenes?
Conclusion
The study suggests that M proteins are crucial for anchoring LTA on the surface of S. pyogenes, which contributes to its hydrophobicity and biofilm formation.
Supporting Evidence
- Overexpression of Emm1 led to enhanced hydrophobicity and biofilm formation.
- Inactivation of emm in serotypes expressing a single emm gene reduced biofilm formation.
- Hydrophobicity was determined by adhesion of streptococci to hexadecane.
- Trypsin treatment abolished the ability of streptococci to adhere to hexadecane.
- Members of the M protein family are involved in forming complexes with LTA.
Takeaway
This study found that certain proteins help bacteria stick to surfaces and form slimy layers, which can make infections worse.
Methodology
The study used isogenic mutants of S. pyogenes to test the effects of M protein family members on LTA binding, hydrophobicity, and biofilm formation.
Limitations
The study did not identify the specific trypsin-sensitive proteins involved in some serotypes.
Statistical Information
P-Value
p≤0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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