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Measuring In Vitro ATPase Activity for Enzymatic Characterization
Published on: August 23, 2016
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Kinetic Characterization of the Shigella Type Three Secretion System ATPase Spa47 Using α-32P ATP
Heather B Case1, Nicholas E Dickenson1
1Department of Chemistry and Biochemistry, Utah State University, Logan, USA.
Bio-Protocol
|November 27, 2018
Summary
This study details a new protocol for measuring the enzyme activity of Spa47, a Shigella ATPase crucial for bacterial infection. The direct alpha-32P ATPase assay accurately quantifies ATP hydrolysis for this essential protein secretion component.
Area of Science:
- Biochemistry
- Molecular Biology
- Microbiology
Background:
- ATPases are vital enzymes that hydrolyze ATP to power essential cellular processes.
- The Shigella protein Spa47 is an ATPase essential for the type three secretion apparatus (T3SA) and bacterial pathogenesis.
- Accurate characterization of ATPase activity is crucial for understanding enzyme function and regulation.
Purpose of the Study:
- To describe a detailed protocol for characterizing the enzyme kinetics of the Shigella ATPase, Spa47.
- To provide a method for accurately measuring ATP hydrolysis by Spa47 under various conditions.
Main Methods:
- Development and application of a direct alpha-32P ATPase assay.
- Enzyme kinetic characterization of Spa47.
Main Results:
- A robust protocol for quantifying Spa47 ATPase activity was established.
- The assay allows for detailed kinetic analysis of ATP hydrolysis by Spa47.
Conclusions:
- The described direct alpha-32P ATPase assay is a valuable tool for studying Spa47 enzyme kinetics.
- This methodology will facilitate further research into Spa47 function, regulation, and its role in Shigella pathogenesis.
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