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-Structure paper
Title | Mechanical inhibition of isolated V from V/A-ATPase for proton conductance. |
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Journal, issue, pages | Elife, Vol. 9, Year 2020 |
Publish date | Jul 8, 2020 |
Authors | Jun-Ichi Kishikawa / Atsuko Nakanishi / Aya Furuta / Takayuki Kato / Keiichi Namba / Masatada Tamakoshi / Kaoru Mitsuoka / Ken Yokoyama / |
PubMed Abstract | V-ATPase is an energy converting enzyme, coupling ATP hydrolysis/synthesis in the hydrophilic V domain, with proton flow through the V membrane domain, via rotation of the central rotor complex ...V-ATPase is an energy converting enzyme, coupling ATP hydrolysis/synthesis in the hydrophilic V domain, with proton flow through the V membrane domain, via rotation of the central rotor complex relative to the surrounding stator apparatus. Upon dissociation from the V domain, the V domain of the eukaryotic V-ATPase can adopt a physiologically relevant auto-inhibited form in which proton conductance through the V 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 V/A-ATPase and isolated V at near-atomic resolution, respectively. These structures clarify how the isolated V domain adopts the auto-inhibited form and how the complex prevents formation of the inhibited V form. |
External links | Elife / PubMed:32639230 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.5 - 3.93 Å |
Structure data | EMDB-30013: EMDB-30014: V1-ATPase built from cryo-EM map of V/A-ATPase from Thermus thermophilus. EMDB-30015, PDB-6ly9: |
Chemicals | ChemComp-ADP: |
Source |
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Keywords | MOTOR PROTEIN / rotary ATPase / V/A-ATPase / molecular motor |