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  Rotary substates of mitochondrial ATP synthase reveal the basis of flexible F1-Fo coupling

Murphy, B. J., Klusch, N., Langer, J. D., Mills, D., Yildiz, Ö., & Kühlbrandt, W. (2019). Rotary substates of mitochondrial ATP synthase reveal the basis of flexible F1-Fo coupling. Science, 364(6446): eaaw9128, pp. 1155. doi:10.1126/science.aaw9128.

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Murphy, Bonnie J.1, Autor                 
Klusch, Niklas1, Autor                 
Langer, Julian David2, Autor                 
Mills, Deryck1, Autor                 
Yildiz, Özkan1, Autor                 
Kühlbrandt, Werner1, Autor                 
Affiliations:
1Department of Structural Biology, Max Planck Institute of Biophysics, Max Planck Society, ou_2068291              
2Department of Molecular Membrane Biology, Max Planck Institute of Biophysics, Max Planck Society, ou_2068290              

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 Zusammenfassung: F1-Fo-adenosine triphosphate (ATP) synthases make the energy of the proton-motive force available for energy-consuming processes in the cell. We determined the single-particle cryo-electron microscopy structure of active dimeric ATP synthase from mitochondria of Polytomella sp. at a resolution of 2.7 to 2.8 angstroms. Separation of 13 well-defined rotary substates by three-dimensional classification provides a detailed picture of the molecular motions that accompany c-ring rotation and result in ATP synthesis. Crucially, the F1 head rotates along with the central stalk and c-ring rotor for the first ~30° of each 120° primary rotary step to facilitate flexible coupling of the stoichiometrically mismatched F1 and Fo subcomplexes. Flexibility is mediated primarily by the interdomain hinge of the conserved OSCP subunit. A conserved metal ion in the proton access channel may synchronize c-ring protonation with rotation.

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Sprache(n): eng - English
 Datum: 2019-02-052019-04-262019-06-202019-06-21
 Publikationsstatus: Erschienen
 Seiten: 11
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1126/science.aaw9128
 Art des Abschluß: -

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Titel: Science
  Andere : Science
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Washington, D.C. : American Association for the Advancement of Science
Seiten: - Band / Heft: 364 (6446) Artikelnummer: eaaw9128 Start- / Endseite: 1155 Identifikator: ISSN: 0036-8075
CoNE: https://pure.mpg.de/cone/journals/resource/991042748276600_1