7UNE

The V1 region of bovine V-ATPase in complex with human mEAK7 (focused refinement)

  • Classification: PROTON TRANSPORT
  • Organism(s): Bos taurus, Homo sapiens
  • Expression System: Escherichia coli
  • Mutation(s): No 
  • Membrane Protein: Yes  mpstruc

  • Deposited: 2022-04-10 Released: 2022-06-15 
  • Deposition Author(s): Wang, R., Li, X.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.73 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis of mEAK7-mediated human V-ATPase regulation.

Wang, R.Qin, Y.Xie, X.S.Li, X.

(2022) Nat Commun 13: 3272-3272

  • DOI: https://doi.org/10.1038/s41467-022-30899-z
  • Primary Citation of Related Structures:  
    7UNE, 7UNF

  • PubMed Abstract: 

    The activity of V-ATPase is well-known to be regulated by reversible dissociation of its V 1 and V o domains in response to growth factor stimulation, nutrient sensing, and cellular differentiation. The molecular basis of its regulation by an endogenous modulator without affecting V-ATPase assembly remains unclear. Here, we discover that a lysosome-anchored protein termed (mammalian Enhancer-of-Akt-1-7 (mEAK7)) binds to intact V-ATPase. We determine cryo-EM structure of human mEAK7 in complex with human V-ATPase in native lipid-containing nanodiscs. The structure reveals that the TLDc domain of mEAK7 engages with subunits A, B, and E, while its C-terminal domain binds to subunit D, presumably blocking V 1 -V o torque transmission. Our functional studies suggest that mEAK7, which may act as a V-ATPase inhibitor, does not affect the activity of V-ATPase in vitro. However, overexpression of mEAK7 in HCT116 cells that stably express subunit a4 of V-ATPase represses the phosphorylation of ribosomal protein S6. Thus, this finding suggests that mEAK7 potentially links mTOR signaling with V-ATPase activity.


  • Organizational Affiliation

    Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
V-type proton ATPase catalytic subunit AA [auth L],
E [auth M],
F [auth N]
617Bos taurusMutation(s): 0 
EC: 7.1.2.2
Membrane Entity: Yes 
UniProt
Find proteins for P31404 (Bos taurus)
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Go to UniProtKB:  P31404
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UniProt GroupP31404
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
V-type proton ATPase subunit DB [auth D]247Bos taurusMutation(s): 0 
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
KIAA1609 protein, isoform CRA_aC [auth U]463Homo sapiensMutation(s): 0 
Gene Names: KIAA1609hCG_39793
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
V-type proton ATPase subunit E 1D [auth d],
J [auth b],
K [auth c]
226Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P11019 (Bos taurus)
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UniProt GroupP11019
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
V-type proton ATPase subunit B, brain isoformG [auth Q],
H [auth O],
I [auth P]
511Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P31408 (Bos taurus)
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
V-type proton ATPase subunit GL [auth g],
M [auth e],
N [auth f]
118Bos taurusMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for Q0VCV6 (Bos taurus)
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Go to UniProtKB:  Q0VCV6
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UniProt GroupQ0VCV6
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.73 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM135343
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesP01 HL020948
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesR01 HL072304

Revision History  (Full details and data files)

  • Version 1.0: 2022-06-15
    Type: Initial release
  • Version 1.1: 2022-06-29
    Changes: Database references
  • Version 1.2: 2024-02-14
    Changes: Data collection