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-Structure paper
Title | Structure of V-ATPase from the mammalian brain. |
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Journal, issue, pages | Science, Vol. 367, Issue 6483, Page 1240-1246, Year 2020 |
Publish date | Mar 13, 2020 |
Authors | Yazan M Abbas / Di Wu / Stephanie A Bueler / Carol V Robinson / John L Rubinstein / |
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 ...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. |
External links | Science / PubMed:32165585 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.6 - 5.7 Å |
Structure data | EMDB-21317: Mammalian V-ATPase from rat brain with the Legionella pneumophila effector protein SidK - rotational state 1 non-uniform refinement EMDB-21318: Mammalian V-ATPase from rat brain with the Legionella pneumophila effector protein SidK - rotational state 2 non-uniform refinement EMDB-21319: Mammalian V-ATPase from rat brain with the Legionella pneumophila effector protein SidK - rotational state 3 non-uniform refinement EMDB-21345, PDB-6vq9: EMDB-21346, PDB-6vqa: EMDB-21347, PDB-6vqb: EMDB-21348, PDB-6vqc: EMDB-21349, PDB-6vqg: EMDB-21350, PDB-6vqh: EMDB-21351, PDB-6vqi: EMDB-21352, PDB-6vqj: EMDB-21353, PDB-6vqk: |
Chemicals | ChemComp-ADP: ChemComp-MG: |
Source |
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Keywords | PROTON TRANSPORT / membrane protein complex / rotary atpase |