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Related Concept Videos

Development of Antibiotic Resistance01:30

Development of Antibiotic Resistance

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Antibiotic resistance is a major public health concern that arises when bacteria evolve mechanisms to withstand the effects of antibiotic treatments. This resistance can be intrinsic, acquired through genetic mutations, or transferred between bacteria via horizontal gene transfer. The development of antibiotic resistance poses significant challenges in treating bacterial infections and necessitates ongoing research to develop new therapeutic strategies.Intrinsic resistance occurs when bacterial...
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Antibiotic Selection00:57

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Nanomechanics of Drug-target Interactions and Antibacterial Resistance Detection
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The VanS sensor histidine kinase from type-B VRE recognizes vancomycin directly.

Lina J Maciunas, Photis Rotsides, Elizabeth J D'Lauro

    Biorxiv : the Preprint Server for Biology
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    Summary

    Vancomycin-resistant enterococci (VRE) use the VanS protein to detect vancomycin. This study confirms vancomycin directly binds to VanS, activating resistance mechanisms in VRE.

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    Area of Science:

    • Microbiology
    • Molecular Biology
    • Biochemistry

    Background:

    • Vancomycin-resistant enterococci (VRE) are a major cause of hospital-acquired infections.
    • The VanRS two-component system controls VRE vancomycin resistance.
    • The precise mechanism by which VanS senses vancomycin has been unclear.

    Purpose of the Study:

    • To elucidate the mechanism by which VanS detects vancomycin in VRE.
    • To investigate the direct interaction between VanS and vancomycin.

    Main Methods:

    • Purification of the VanRS system from type B VRE.
    • In vitro analysis of VanS autokinase activity in a membrane environment.
    • Localization of the vancomycin-binding site on VanS.

    Main Results:

    • Vancomycin directly stimulates the autokinase activity of type B VanS.
    • A direct physical interaction between vancomycin and VanS was confirmed.
    • The vancomycin-binding region was localized to the periplasmic domain of VanS.

    Conclusions:

    • VanS directly senses vancomycin through physical binding.
    • This direct interaction activates VRE resistance mechanisms.
    • Understanding this mechanism may aid in overcoming VRE resistance.