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Structure paper

TitleStructure, mechanism, and regulation of the chloroplast ATP synthase.
Journal, issue, pagesScience, Vol. 360, Issue 6389, Year 2018
Publish dateMay 11, 2018
AuthorsAlexander Hahn / Janet Vonck / Deryck J Mills / Thomas Meier / Werner Kühlbrandt /
PubMed AbstractThe chloroplast adenosine triphosphate (ATP) synthase uses the electrochemical proton gradient generated by photosynthesis to produce ATP, the energy currency of all cells. Protons conducted through ...The chloroplast adenosine triphosphate (ATP) synthase uses the electrochemical proton gradient generated by photosynthesis to produce ATP, the energy currency of all cells. Protons conducted through the membrane-embedded F motor drive ATP synthesis in the F head by rotary catalysis. We determined the high-resolution structure of the complete cFF complex by cryo-electron microscopy, resolving side chains of all 26 protein subunits, the five nucleotides in the F head, and the proton pathway to and from the rotor ring. The flexible peripheral stalk redistributes differences in torsional energy across three unequal steps in the rotation cycle. Plant ATP synthase is autoinhibited by a β-hairpin redox switch in subunit γ that blocks rotation in the dark.
External linksScience / PubMed:29748256 / PubMed Central
MethodsEM (single particle)
Resolution3.15 - 4.3 Å
Structure data

4270

6fkf

EMDB-4270, PDB-6fkf:
Chloroplast F1Fo conformation 1
Method: EM (single particle) / Resolution: 3.15 Å

4271

6fkh

EMDB-4271, PDB-6fkh:
Chloroplast F1Fo conformation 2
Method: EM (single particle) / Resolution: 4.2 Å

4272

6fki

EMDB-4272, PDB-6fki:
Chloroplast F1Fo conformation 3
Method: EM (single particle) / Resolution: 4.3 Å

EMDB-4273:
Fo conformation 1
Method: EM (single particle) / Resolution: 3.6 Å

Chemicals

ChemComp-ATP:
ADENOSINE-5'-TRIPHOSPHATE / ATP, energy-carrying molecule*YM

ChemComp-MG:
Unknown entry

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

ChemComp-HOH:
WATER

Source
  • spinacia oleracea (spinach)
KeywordsMEMBRANE PROTEIN / ATP synthase / membrane protein complex / molecular motor

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