8PHE

ACAD9-WT in complex with ECSIT-CTER


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

The assembly of the Mitochondrial Complex I Assembly complex uncovers a redox pathway coordination.

McGregor, L.Acajjaoui, S.Desfosses, A.Saidi, M.Bacia-Verloop, M.Schwarz, J.J.Juyoux, P.von Velsen, J.Bowler, M.W.McCarthy, A.A.Kandiah, E.Gutsche, I.Soler-Lopez, M.

(2023) Nat Commun 14: 8248-8248

  • DOI: https://doi.org/10.1038/s41467-023-43865-0
  • Primary Citation of Related Structures:  
    8PHE, 8PHF

  • PubMed Abstract: 

    The Mitochondrial Complex I Assembly (MCIA) complex is essential for the biogenesis of respiratory Complex I (CI), the first enzyme in the respiratory chain, which has been linked to Alzheimer's disease (AD) pathogenesis. However, how MCIA facilitates CI assembly, and how it is linked with AD pathogenesis, is poorly understood. Here we report the structural basis of the complex formation between the MCIA subunits ECSIT and ACAD9. ECSIT binding induces a major conformational change in the FAD-binding loop of ACAD9, releasing the FAD cofactor and converting ACAD9 from a fatty acid β-oxidation (FAO) enzyme to a CI assembly factor. We provide evidence that ECSIT phosphorylation downregulates its association with ACAD9 and is reduced in neuronal cells upon exposure to amyloid-β (Aβ) oligomers. These findings advance our understanding of the MCIA complex assembly and suggest a possible role for ECSIT in the reprogramming of bioenergetic pathways linked to Aβ toxicity, a hallmark of AD.


  • Organizational Affiliation

    Structural Biology Group, European Synchrotron Radiation Facility (ESRF), 38043, Grenoble, France.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Complex I assembly factor ACAD9, mitochondrial
A, B
591Homo sapiensMutation(s): 0 
Gene Names: ACAD9
EC: 1.3.8
UniProt & NIH Common Fund Data Resources
Find proteins for Q9H845 (Homo sapiens)
Explore Q9H845 
Go to UniProtKB:  Q9H845
PHAROS:  Q9H845
GTEx:  ENSG00000177646 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9H845
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Evolutionarily conserved signaling intermediate in Toll pathway, mitochondrial
C, D
221Homo sapiensMutation(s): 0 
Gene Names: ECSIT
UniProt & NIH Common Fund Data Resources
Find proteins for Q9BQ95 (Homo sapiens)
Explore Q9BQ95 
Go to UniProtKB:  Q9BQ95
PHAROS:  Q9BQ95
GTEx:  ENSG00000130159 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9BQ95
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.10 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Other governmentFrance--

Revision History  (Full details and data files)

  • Version 1.0: 2024-01-24
    Type: Initial release
  • Version 1.1: 2024-01-31
    Changes: Database references