6VQK

Mammalian V-ATPase from rat brain collar and peripheral stalks rotational state 3 (from focused refinement)

6VQK の概要

• エントリーDOI: 10.2210/pdb6vqk/pdb
• EMDBエントリー: 21353
• 分子名称: V-type proton ATPase subunit C 1, V-type proton ATPase subunit E 1, V-type proton ATPase subunit G, ... (4 entities in total)
• 機能のキーワード: membrane protein complex, rotary atpase, proton transport
• 由来する生物種: Rattus norvegicus (Rat); 詳細
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 259961.68

構造登録者

Abbas, Y.M.,Rubinstein, J.L. (登録日: 2020-02-05, 公開日: 2020-03-18, 最終更新日: 2024-03-06)

主引用文献

Abbas, Y.M.,Wu, D.,Bueler, S.A.,Robinson, C.V.,Rubinstein, J.L.
Structure of V-ATPase from the mammalian brain.
Science, 367:1240-1246, 2020

PubMed Abstract: In neurons, the loading of neurotransmitters into synaptic vesicles uses energy from proton-pumping vesicular- or vacuolar-type adenosine triphosphatases (V-ATPases). These membrane protein complexes possess numerous subunit isoforms, which complicates their analysis. We isolated homogeneous rat brain V-ATPase through its interaction with SidK, a effector protein. Cryo-electron microscopy allowed the construction of an atomic model, defining the enzyme's ATP:proton ratio as 3:10 and revealing a homolog of yeast subunit f in the membrane region, which we tentatively identify as RNAseK. The c ring encloses the transmembrane anchors for cleaved ATP6AP1/Ac45 and ATP6AP2/PRR, the latter of which is the (pro)renin receptor that, in other contexts, is involved in both Wnt signaling and the renin-angiotensin system that regulates blood pressure. This structure shows how ATP6AP1/Ac45 and ATP6AP2/PRR enable assembly of the enzyme's catalytic and membrane regions.

PubMed: 32165585
DOI: 10.1126/science.aaz2924

実験手法

ELECTRON MICROSCOPY (5.7 Å)