Download MendeleyMechanical inhibition of isolated V o from V/A-ATPase for proton conductance.
Kishikawa, J.I., Nakanishi, A., Furuta, A., Kato, T., Namba, K., Tamakoshi, M., Mitsuoka, K., Yokoyama, K.(2020) Elife 9
- PubMed: 32639230
- DOI: https://doi.org/10.7554/eLife.56862
- Primary Citation of Related Structures:
6LY8, 6LY9 - PubMed Abstract:
V-ATPase is an energy converting enzyme, coupling ATP hydrolysis/synthesis in the hydrophilic V 1 domain, with proton flow through the V o membrane domain, via rotation of the central rotor complex relative to the surrounding stator apparatus. Upon dissociation from the V 1 domain, the V o domain of the eukaryotic V-ATPase can adopt a physiologically relevant auto-inhibited form in which proton conductance through the V o domain is prevented, however the molecular mechanism of this inhibition is not fully understood. Using cryo-electron microscopy, we determined the structure of both the holo V/A-ATPase and isolated V o at near-atomic resolution, respectively. These structures clarify how the isolated V o domain adopts the auto-inhibited form and how the holo complex prevents formation of the inhibited V o form.
Organizational Affiliation:
Department of Molecular Biosciences, Kyoto Sangyo University, Kamigamo-Motoyama, Kyoto, Japan.
