F1-ATPase Is a Highly Efficient Molecular Motor that Rotates with Discrete 120° Steps
@article{Yasuda1998F1ATPaseIA, title={F1-ATPase Is a Highly Efficient Molecular Motor that Rotates with Discrete 120° Steps}, author={Ryohei Yasuda and Hiroyuki Noji and Kazuhiko Kinosita and Masasuke Yoshida}, journal={Cell}, year={1998}, volume={93}, pages={1117-1124} }
674 Citations
F1-ATPase: a highly efficient rotary ATP machine.
- BiologyEssays in biochemistry
- 2000
A single molecule of F1-ATPase is by itself a rotary motor in which a central subunit, gamma, rotates against a surrounding stator cylinder made of alpha 3 beta 3 hexamer. Driven by the three beta…
Chemo-Mechanical Coupling in the Rotary Molecular Motor F1-ATPase
- Chemistry, Biology
- 2010
F1-ATPase is a molecular motor in which the central γ subunit rotates inside the cylinder made of α3β3 subunits that is coupled to the chemical reactions in the three catalytic sites: binding/release of ATP, ADP, and phosphate, and hydrolysis/synthesis of ATP.
Asymmetry in the F1-ATPase and its implications for the rotational cycle.
- BiologyBiophysical journal
- 2004
Rotation of F1-ATPase: how an ATP-driven molecular machine may work.
- Physics, ChemistryAnnual review of biophysics and biomolecular structure
- 2004
A toy model of F1-ATPase is introduced and its free-energy diagrams discussed to possibly answer two related questions, How is free energy obtained by ATP hydrolysis converted to the mechanical work of rotation, and how is mechanical work done on F1 converted to free energy to produce ATP.
A rotary molecular motor that can work at near 100% efficiency.
- Biology, EngineeringPhilosophical transactions of the Royal Society of London. Series B, Biological sciences
- 2000
In vitro, it is confirmed in vitro that F1 indeed does ca.
F1-ATPase rotates by an asymmetric, sequential mechanism using all three catalytic subunits
- Biology, ChemistryNature Structural &Molecular Biology
- 2007
It is shown that hybrid F1 containing one or two mutant β subunits with altered catalytic kinetics rotates in an asymmetric stepwise fashion, a process described as a 'sequential three-site mechanism'.
Stepping Rotation of F1-ATPase with One, Two, or Three Altered Catalytic Sites That Bind ATP Only Slowly*
- Biology, ChemistryThe Journal of Biological Chemistry
- 2002
It appears that the presence of the slow β subunit(s) does not seriously affect other normal β subunits in the same F1-ATPase molecule and that the order of sequential catalytic events is faithfully maintained even when ATP binding to one or two of the catalytic sites is retarded.
Resolution of distinct rotational substeps by submillisecond kinetic analysis of F1-ATPase
- BiologyNature
- 2001
It is shown by high-speed imaging that the 120° step consists of roughly 90° and 30° substeps, each taking only a fraction of a millisecond, which supports the binding-change model for ATP synthesis by reverse rotation of F1-ATPase.
F1-ATPase: a highly coupled reversible rotary motor.
- Chemistry, BiologyBiochemical Society transactions
- 2006
The novel function of the epsilon subunit as a coupling factor of ATP synthesis catalysed by F1 was revealed and the possible mechanism for highly coupled ATP synthesis supported by the ePSilon sub unit is discussed.
References
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It is shown that a single molecule of F1-ATPase acts as a rotary motor, the smallest known, by direct observation of its motion by attaching a fluorescent actin filament to the γ-subunit as a marker, which enabled us to observe this motion directly.
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The crystal structure of bovine mitochondrial F1-ATPase determined at 2.8 Å resolution supports a catalytic mechanism in intact ATP synthase in which the three catalytic subunits are in different states of the catalytic cycle at any instant.
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