6VOG

Chloroplast ATP synthase (O2, CF1)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.1 of the entry. See complete history


Literature

Structural basis of redox modulation on chloroplast ATP synthase.

Yang, J.H.Williams, D.Kandiah, E.Fromme, P.Chiu, P.L.

(2020) Commun Biol 3: 482-482

  • DOI: https://doi.org/10.1038/s42003-020-01221-8
  • Primary Citation of Related Structures:  
    6VM1, 6VM4, 6VMB, 6VMD, 6VMG, 6VOF, 6VOG, 6VOH, 6VOI, 6VOJ, 6VOK, 6VOL, 6VOM, 6VON, 6VOO

  • PubMed Abstract: 

    In higher plants, chloroplast ATP synthase has a unique redox switch on its γ subunit that modulates enzyme activity to limit ATP hydrolysis at night. To understand the molecular details of the redox modulation, we used single-particle cryo-EM to determine the structures of spinach chloroplast ATP synthase in both reduced and oxidized states. The disulfide linkage of the oxidized γ subunit introduces a torsional constraint to stabilize the two β hairpin structures. Once reduced, free cysteines alleviate this constraint, resulting in a concerted motion of the enzyme complex and a smooth transition between rotary states to facilitate the ATP synthesis. We added an uncompetitive inhibitor, tentoxin, in the reduced sample to limit the flexibility of the enzyme and obtained high-resolution details. Our cryo-EM structures provide mechanistic insight into the redox modulation of the energy regulation activity of chloroplast ATP synthase.


  • Organizational Affiliation

    Center for Applied Structural Discovery (CASD), Biodesign Institute, Arizona State University, Tempe, AZ, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase subunit alpha, chloroplastic
A, B, C
507Spinacia oleraceaMutation(s): 0 
EC: 7.1.2.2
Membrane Entity: Yes 
UniProt
Find proteins for P06450 (Spinacia oleracea)
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Go to UniProtKB:  P06450
Entity Groups  
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UniProt GroupP06450
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase subunit beta, chloroplastic
D, E, F
498Spinacia oleraceaMutation(s): 0 
EC: 7.1.2.2
Membrane Entity: Yes 
UniProt
Find proteins for P00825 (Spinacia oleracea)
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Go to UniProtKB:  P00825
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UniProt GroupP00825
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase delta chain, chloroplasticG [auth d]257Spinacia oleraceaMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P11402 (Spinacia oleracea)
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UniProt GroupP11402
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase gamma chain, chloroplasticH [auth g]364Spinacia oleraceaMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P05435 (Spinacia oleracea)
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UniProt GroupP05435
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
ATP synthase epsilon chain, chloroplasticI [auth e]134Spinacia oleraceaMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P00833 (Spinacia oleracea)
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UniProt GroupP00833
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.35 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1-beta-commit-da823c
MODEL REFINEMENTPHENIX1.17_3644

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-09
    Type: Initial release
  • Version 1.1: 2020-09-16
    Changes: Database references