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"Molecular characterization of the interaction between human IgG and th" by Emma Jayne Proctor, Hannah R. Frost et al.

Group A Streptococcal M-related proteins (Mrps) are dimeric α-helical-coiled-coil cell membrane-bound surface proteins. During infection, Mrp recruit the fragment crystallizable region of human immunoglobulin G via their A-repeat regions to the bacterial surface, conferring upon the bacteria enhanced phagocytosis resistance and augmented growth in human blood. However, Mrps show a high degree of sequence diversity, and it is currently not known whether this diversity affects the Mrp–IgG interaction. Herein, we report that diverse Mrps all bind human IgG subclasses with nanomolar affinity, with differences in affinity which ranged from 3.7 to 11.1 nM for mixed IgG. Using surface plasmon resonance, we confirmed Mrps display preferential IgG-subclass binding. All Mrps were found to have a significantly weaker affinity for IgG3 (p < 0.05) compared to all other IgG subclasses. Furthermore, plasma pulldown assays analyzed via Western blotting revealed that all Mrp were able to bind IgG ....

Groupa Streptococcal , Streptococcalm Related , Binding Affinity , Inding Stoichiometry , Groupa Streptococcus , Mmunoglobulin G , M Protein Family , M Related Protein , Streptococcus Pyogenes , Ubclass Preferences ,

Hormonal steroids found to boost drug resistance in gonorrhea bacteria

Study uncovers how Neisseria gonorrhoeae, a major sexually transmitted infection pathogen, utilizes host-produced hormonal steroids to enhance its drug resistance and survival, revealing a complex interaction between bacterial resistance mechanisms and human hormonal environment. ....

Giovanni Cancemi , Nature Communications , Image Credit , Antibiotic Resistance , Antimicrobial Resistance , Binding Affinity , Ectopic Pregnancy , Inflammatory Disease , Public Health ,

Emerging Trends in Muscle Building Supplements: Exploring the Rise of Selective Androgen Receptor Modulators (SARMs)

Emerging Trends in Muscle Building Supplements: Exploring the Rise of Selective Androgen Receptor Modulators (SARMs)
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