Cryo-EM structure of Tetrahymena thermophila mitochondrial ATP synthase - Fo-wing region

Experimental Data Snapshot

  • Resolution: 2.80 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


Type III ATP synthase is a symmetry-deviated dimer that induces membrane curvature through tetramerization.

Flygaard, R.K.Muhleip, A.Tobiasson, V.Amunts, A.

(2020) Nat Commun 11: 5342-5342

  • DOI: https://doi.org/10.1038/s41467-020-18993-6
  • Primary Citation of Related Structures:  
    6YNV, 6YNW, 6YNX, 6YNY, 6YNZ, 6YO0

  • PubMed Abstract: 

    Mitochondrial ATP synthases form functional homodimers to induce cristae curvature that is a universal property of mitochondria. To expand on the understanding of this fundamental phenomenon, we characterized the unique type III mitochondrial ATP synthase in its dimeric and tetrameric form. The cryo-EM structure of a ciliate ATP synthase dimer reveals an unusual U-shaped assembly of 81 proteins, including a substoichiometrically bound ATPTT2, 40 lipids, and co-factors NAD and CoQ. A single copy of subunit ATPTT2 functions as a membrane anchor for the dimeric inhibitor IF 1 . Type III specific linker proteins stably tie the ATP synthase monomers in parallel to each other. The intricate dimer architecture is scaffolded by an extended subunit-a that provides a template for both intra- and inter-dimer interactions. The latter results in the formation of tetramer assemblies, the membrane part of which we determined to 3.1 Å resolution. The structure of the type III ATP synthase tetramer and its associated lipids suggests that it is the intact unit propagating the membrane curvature.

  • Organizational Affiliation

    Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, 17165, Solna, Sweden.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATPTT1A [auth e]480Tetrahymena thermophilaMutation(s): 0 
Find proteins for I7LVQ8 (Tetrahymena thermophila (strain SB210))
Explore I7LVQ8 
Go to UniProtKB:  I7LVQ8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupI7LVQ8
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on NAD

Download Ideal Coordinates CCD File 
C21 H27 N7 O14 P2
Experimental Data & Validation

Experimental Data

  • Resolution: 2.80 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Swedish Research CouncilSwedenNT_2015-04107
European Research Council (ERC)SwedenERC-2018-StG-805230
Knut and Alice Wallenberg FoundationSweden2018.0080

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-30
    Type: Initial release
  • Version 1.1: 2020-11-11
    Changes: Database references
  • Version 1.2: 2024-05-22
    Changes: Data collection, Database references