DOI: 10.1073/pnas.0337432100. The missing link between thermodynamics and structure in F <sub>1</sub> -ATPase

The missing link between thermodynamics and structure in F 1 -ATPase

10.1073/pnas.0337432100

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

F 1 F o -ATP synthase is the enzyme responsible for most of the ATP synthesis in living systems. The catalytic domain F 1 of the F 1 F o complex, F 1 -ATPase, has the ability to hydrolyze ATP. A fundamental problem in the development of a detailed mechanism for this enzyme is that it has not been possible to determine experimentally the relation between the ligand binding affinities measured in solution and the different conformations of the catalytic β subunits (β TP , β DP , β E ) observed in the crystal structures of the mitochondrial enzyme, MF 1 . Using free energy difference simulations for the hydrolysis reaction ATP+H 2 O → ADP+P i in the β TP and β DP sites and unisite hydrolysis data, we are able to identify β TP as the “tight” ( K D = 10 −12 M, MF 1 ) binding site for ATP and β DP as the “loose” site. An energy decomposition analysis demonstrates how certain residues, some of which have been shown to be important in catalysis, modulate the free energy of the hydrolysis reaction in the β TP and β DP sites, even though their structures are very similar. Combined with the recently published simulations of the rotation cycle of F 1 -ATPase, the present results make possible a consistent description of the binding change mechanism of F 1 -ATPase at an atomic level of detail.

Bibliography

Yang, W., Gao, Y. Q., Cui, Q., Ma, J., & Karplus, M. (2003). The missing link between thermodynamics and structure in F 1 -ATPase. Proceedings of the National Academy of Sciences, 100(3), 874â879.

Authors 5

W. Yang (first)
Y. Q. Gao (additional)
Q. Cui (additional)
J. Ma (additional)
M. Karplus (additional)

References 47 Referenced 99

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Dates

Type	When
Created	22 years, 6 months ago (Feb. 4, 2003, 12:24 p.m.)
Deposited	3 years, 4 months ago (April 25, 2022, 9:57 p.m.)
Indexed	2 months ago (July 1, 2025, 5:45 a.m.)
Issued	22 years, 7 months ago (Jan. 27, 2003)
Published	22 years, 7 months ago (Jan. 27, 2003)
Published Online	22 years, 7 months ago (Jan. 27, 2003)
Published Print	22 years, 6 months ago (Feb. 4, 2003)

Funders 0

None

BibTeX

@article{Yang_2003, title={The missing link between thermodynamics and structure in F 1 -ATPase}, volume={100}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.0337432100}, DOI={10.1073/pnas.0337432100}, number={3}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Yang, W. and Gao, Y. Q. and Cui, Q. and Ma, J. and Karplus, M.}, year={2003}, month=jan, pages={874–879} }

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