8BEP

Cryo-EM structure of the Arabidopsis thaliana I+III2 supercomplex (CIII MPP domain)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structure of the respiratory I + III 2 supercomplex from Arabidopsis thaliana at 2 angstrom resolution.

Klusch, N.Dreimann, M.Senkler, J.Rugen, N.Kuhlbrandt, W.Braun, H.P.

(2023) Nat Plants 9: 142-156

  • DOI: https://doi.org/10.1038/s41477-022-01308-6
  • Primary Citation of Related Structures:  
    8BED, 8BEE, 8BEF, 8BEH, 8BEL, 8BEP, 8BPX, 8BQ5, 8BQ6

  • PubMed Abstract: 

    Protein complexes of the mitochondrial respiratory chain assemble into respiratory supercomplexes. Here we present the high-resolution electron cryo-microscopy structure of the Arabidopsis respiratory supercomplex consisting of complex I and a complex III dimer, with a total of 68 protein subunits and numerous bound cofactors. A complex I-ferredoxin, subunit B14.7 and P9, a newly defined subunit of plant complex I, mediate supercomplex formation. The component complexes stabilize one another, enabling new detailed insights into their structure. We describe (1) an interrupted aqueous passage for proton translocation in the membrane arm of complex I; (2) a new coenzyme A within the carbonic anhydrase module of plant complex I defining a second catalytic centre; and (3) the water structure at the proton exit pathway of complex III 2 with a co-purified ubiquinone in the Q O site. We propose that the main role of the plant supercomplex is to stabilize its components in the membrane.


  • Organizational Affiliation

    Department of Structural Biology, Max-Planck-Institute of Biophysics, Frankfurt, Germany. Niklas.Klusch@biophys.mpg.de.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Probable mitochondrial-processing peptidase subunit alpha-1, mitochondrialA,
E [auth K]
503Arabidopsis thalianaMutation(s): 0 
UniProt
Find proteins for Q9ZU25 (Arabidopsis thaliana)
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Go to UniProtKB:  Q9ZU25
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UniProt GroupQ9ZU25
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Probable mitochondrial-processing peptidase subunit beta, mitochondrialB,
F [auth L]
531Arabidopsis thalianaMutation(s): 0 
EC: 3.4.24.64
UniProt
Find proteins for Q42290 (Arabidopsis thaliana)
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Go to UniProtKB:  Q42290
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UniProt GroupQ42290
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit Rieske-1, mitochondrialC [auth D],
G [auth N]
272Arabidopsis thalianaMutation(s): 0 
EC: 7.1.1.8
UniProt
Find proteins for Q94JS0 (Arabidopsis thaliana)
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Go to UniProtKB:  Q94JS0
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UniProt GroupQ94JS0
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  • Reference Sequence
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Cytochrome b-c1 complex subunit 7-2, mitochondrialD [auth F],
H [auth P]
122Arabidopsis thalianaMutation(s): 0 
UniProt
Find proteins for F4JWS8 (Arabidopsis thaliana)
Explore F4JWS8 
Go to UniProtKB:  F4JWS8
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UniProt GroupF4JWS8
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1-4487
RECONSTRUCTIONRELION3.1.3

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Max Planck SocietyGermany--

Revision History  (Full details and data files)

  • Version 1.0: 2023-01-11
    Type: Initial release
  • Version 1.1: 2023-02-01
    Changes: Database references
  • Version 1.2: 2024-07-24
    Changes: Data collection