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-Structure paper
タイトル | Structural snapshots of V/A-ATPase reveal the rotary catalytic mechanism of rotary ATPases. |
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ジャーナル・号・ページ | Nat Commun, Vol. 13, Issue 1, Page 1213, Year 2022 |
掲載日 | 2022年3月8日 |
著者 | J Kishikawa / A Nakanishi / A Nakano / S Saeki / A Furuta / T Kato / K Mistuoka / K Yokoyama / |
PubMed 要旨 | V/A-ATPase is a motor protein that shares a common rotary catalytic mechanism with FF ATP synthase. When powered by ATP hydrolysis, the V domain rotates the central rotor against the AB hexamer, ...V/A-ATPase is a motor protein that shares a common rotary catalytic mechanism with FF ATP synthase. When powered by ATP hydrolysis, the V domain rotates the central rotor against the AB hexamer, composed of three catalytic AB dimers adopting different conformations (AB, AB, and AB). Here, we report the atomic models of 18 catalytic intermediates of the V domain of V/A-ATPase under different reaction conditions, determined by single particle cryo-EM. The models reveal that the rotor does not rotate immediately after binding of ATP to the V. Instead, three events proceed simultaneously with the 120˚ rotation of the shaft: hydrolysis of ATP in AB, zipper movement in AB by the binding ATP, and unzipper movement in AB with release of both ADP and Pi. This indicates the unidirectional rotation of V/A-ATPase by a ratchet-like mechanism owing to ATP hydrolysis in AB, rather than the power stroke model proposed previously for F-ATPase. |
リンク | Nat Commun / PubMed:35260556 / PubMed Central |
手法 | EM (単粒子) |
解像度 | 2.7 - 6.3 Å |
構造データ | EMDB-31841: Nucleotide-free V/A-ATPase from Thermus thermophilus, State1 EMDB-31842, PDB-7vai: EMDB-31843, PDB-7vaj: EMDB-31844: Nucleotide-free V/A-ATPase from Thermus thermophilus, state2 EMDB-31845, PDB-7vak: EMDB-31846: Nucleotide-free V/A-ATPase from Thermus thermophilus, state3 EMDB-31847: V/A-ATPase from Thermus thermophilus, high ATP, state1-1 EMDB-31848: V/A-ATPase ftom Thermus thermophilus, high ATP, state1-2 EMDB-31849, PDB-7val: EMDB-31850, PDB-7vam: EMDB-31851: V/A-ATPase from Thermus thermophilus, high ATP, state2-1 EMDB-31852: V/A-ATPase from Thermus thermophilus, high ATP, state2-2 EMDB-31853, PDB-7van: EMDB-31854, PDB-7vao: EMDB-31855: V/A-ATPase from Thermus thermophilus, high ATP, state3-1 EMDB-31856: V/A-ATPase from Thermus thermophilus, high ATP, state3-2 EMDB-31857, PDB-7vap: EMDB-31858, PDB-7vaq: EMDB-31859: V/A-ATPase from Thermus thermophilus at low ATP concentration, state1 EMDB-31860, PDB-7var: EMDB-31861, PDB-7vas: EMDB-31862: V/A-ATPase from Thermus thermophilus at low ATP concentration, state2 EMDB-31863, PDB-7vat: EMDB-31864, PDB-7vau: EMDB-31865: V/A-ATPase from Thermus thermophilus at low ATP concentration, state3 EMDB-31866, PDB-7vav: EMDB-31867: V/A-ATPase from Thermus thermophilus at saturated ATP-gamma-S condition, state1 EMDB-31868, PDB-7vaw: EMDB-31869, PDB-7vax: EMDB-31870: V/A-ATPase from Thermus thermophilus at saturated ATP-gamma-S condition, state2 EMDB-31871, PDB-7vay: EMDB-31872: V/A-ATPase from Thermus thermophilus at saturated ATP-gamma-S condition, state3 EMDB-31873, PDB-7vb0: |
化合物 | ChemComp-ADP: ChemComp-MG: ChemComp-PO4: ChemComp-ATP: ChemComp-AGS: |
由来 |
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キーワード | MOTOR PROTEIN / rotary ATPase / V-type ATPase / ATP synthase / Thermus thermophilus / chemo-mechanical coupling |