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Visualization of ATP Synthase Dimers in Mitochondria by Electron Cryo-tomography
Published on: September 14, 2014
Structural and functional features of yeast V-ATPase subunit C
1Department of Biochemistry, The George S. Wise Faculty of Life Sciences, The Daniella Rich Institute for Structural Biology, Tel Aviv University, Tel Aviv 69978, Israel.
Biochimica Et Biophysica Acta
|July 11, 2006
Summary
The V-ATPases are essential proton pumps in cells. Subunit C acts as a flexible stator, connecting the V0 and V1 parts, and influences the enzyme
Area of Science:
- Biochemistry
- Molecular Biology
- Cell Biology
Background:
- V-ATPases are vital proton pumps essential for cellular processes.
- They consist of membrane-bound V0 and cytosolic V1 sub-complexes.
- Eukaryotic V-ATPases can reversibly dissociate, regulating proton translocation and ATP hydrolysis.
Purpose of the Study:
- To investigate the role of V-ATPase Subunit C.
- To understand its function as a flexible stator.
- To explore its interaction with F-actin filaments and its role in energy conversion.
Main Methods:
- Biochemical analysis
- Genetic studies
- Structural data interpretation
Main Results:
- Subunit C acts as a flexible stator, linking V0 and V1 sub-complexes.
- It regulates the reversible dissociation of the V-ATPase complex.
- Subunit C interacts with F-actin filaments.
Conclusions:
- Subunit C is crucial for V-ATPase structural integrity and regulation.
- Its structural features facilitate energy conversion and interactions with actin and nucleotides.
- This highlights a key regulatory mechanism in cellular proton transport.
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