Structural and Biophysical Characterization of the Yersinia Type Three Secretion System ATPase YscN
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View abstract on PubMed
Summary
This summary is machine-generated.Yersinia
Area Of Science
- Microbiology
- Structural Biology
- Biochemistry
Background
- Yersinia species are significant human pathogens responsible for diseases like the plague.
- The Type Three Secretion System (T3SS) is crucial for Yersinia virulence.
- YscN, a T3SS ATPase, powers effector secretion and apparatus formation.
Purpose Of The Study
- To extensively characterize the enzymatic activity of YscN.
- To determine the structural and environmental factors influencing YscN function.
- To identify potential targets for novel anti-virulence therapies.
Main Methods
- Enzymatic characterization of recombinant YscN under various conditions (pH, temperature, concentration).
- Circular dichroism for thermal stability assessment.
- High-resolution crystal structure determination and homology modeling.
- Mutational analysis and analytical ultracentrifugation (AUC).
Main Results
- YscN shows increased stability and activity in alkaline conditions.
- The first high-resolution crystal structure of YscN was determined.
- Oligomerization is essential for YscN ATPase activity, despite predominantly monomeric form in solution.
- Transient oligomeric interactions likely facilitate ATP hydrolysis.
Conclusions
- Environmental factors like pH significantly impact YscN activity.
- YscN functions through transient oligomerization, a novel mechanism for T3SS ATPases.
- Understanding YscN structure-function provides avenues for developing T3SS inhibitors.
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