Cryo-EM structures of the autoinhibitedE. coliATP synthase in three rotational states.Sobti, M., Smits, C., Wong, A.S., Ishmukhametov, R., Stock, D., Sandin, S., Stewart, A.G.
(2016) Elife 5: --
- PubMed: 28001127
- DOI: 10.7554/eLife.21598
- Primary Citation of Related Structures:
- PubMed Abstract:
A molecular model that provides a framework for interpreting the wealth of functional information obtained on the <i>E. coli </i> F-ATP synthase has been generated using cryo-electron microscopy. Three different states that relate to rotation of the ...
A molecular model that provides a framework for interpreting the wealth of functional information obtained on the E. coli F-ATP synthase has been generated using cryo-electron microscopy. Three different states that relate to rotation of the enzyme were observed, with the central stalk's ε subunit in an extended autoinhibitory conformation in all three states. The F o motor comprises of seven transmembrane helices and a decameric c-ring and invaginations on either side of the membrane indicate the entry and exit channels for protons. The proton translocating subunit contains near parallel helices inclined by ~30° to the membrane, a feature now synonymous with rotary ATPases. For the first time in this rotary ATPase subtype, the peripheral stalk is resolved over its entire length of the complex, revealing the F 1 attachment points and a coiled-coil that bifurcates toward the membrane with its helices separating to embrace subunit a from two sides.
Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, United Kingdom.,School of Biological Sciences, Nanyang Technological University, Singapore, Singapore.,Faculty of Medicine, The University of New South Wales, Sydney, Australia.,Molecular, Structural and Computational Biology Division, The Victor Chang Cardiac Research Institute, Darlinghurst, Australia.,NTU Institute of Structural Biology, Nanyang Technological University, Singapore, Singapore.