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- PDB-6ynv: Cryo-EM structure of Tetrahymena thermophila mitochondrial ATP sy... -

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Basic information

Entry
Database: PDB / ID: 6ynv
TitleCryo-EM structure of Tetrahymena thermophila mitochondrial ATP synthase - Fo-wing region
ComponentsATPTT1
KeywordsMEMBRANE PROTEIN / mitochondria / ATP synthase / oxidoreductase / NAD
Function / homologySulphide quinone-reductase / FAD/NAD(P)-binding domain / Pyridine nucleotide-disulphide oxidoreductase / FAD/NAD(P)-binding domain superfamily / oxidoreductase activity / NICOTINAMIDE-ADENINE-DINUCLEOTIDE / Oxidoreductase, putative
Function and homology information
Biological speciesTetrahymena thermophila (eukaryote)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsKock Flygaard, R. / Muhleip, A. / Amunts, A.
Funding support Sweden, 3items
OrganizationGrant numberCountry
Swedish Research CouncilNT_2015-04107 Sweden
European Research Council (ERC)ERC-2018-StG-805230 Sweden
Knut and Alice Wallenberg Foundation2018.0080 Sweden
CitationJournal: Nat Commun / Year: 2020
Title: Type III ATP synthase is a symmetry-deviated dimer that induces membrane curvature through tetramerization.
Authors: Rasmus Kock Flygaard / Alexander Mühleip / Victor Tobiasson / Alexey Amunts /
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 ...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. 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.
History
DepositionApr 14, 2020Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 30, 2020Provider: repository / Type: Initial release
Revision 1.1Nov 11, 2020Group: Database references / Category: citation / citation_author
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year
Revision 1.2May 22, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Assembly

Deposited unit
e: ATPTT1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)55,5812
Polymers54,9181
Non-polymers6631
Water0
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area1240 Å2
ΔGint-5 kcal/mol
Surface area17500 Å2
MethodPISA

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Components

#1: Protein ATPTT1


Mass: 54917.816 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Tetrahymena thermophila (eukaryote) / References: UniProt: I7LVQ8
#2: Chemical ChemComp-NAD / NICOTINAMIDE-ADENINE-DINUCLEOTIDE / Nicotinamide adenine dinucleotide


Mass: 663.425 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C21H27N7O14P2 / Comment: NAD*YM
Has ligand of interestN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Mitochondrial ATP synthase, Fo-wing region / Type: COMPLEX / Entity ID: #1 / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Tetrahymena thermophila (eukaryote)
Buffer solutionpH: 7.5
SpecimenConc.: 0.75 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/2
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELDBright-field microscopy / Nominal magnification: 165000 X
Image recordingElectron dose: 30.9 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 QUANTUM (4k x 4k)
EM imaging opticsEnergyfilter name: GIF Quantum LS / Energyfilter slit width: 20 eV
Image scansMovie frames/image: 20

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Processing

EM software
IDNameVersionCategoryDetails
1RELION3.1particle selectionbeta
2EPUimage acquisition
4CTFFIND4.1.13CTF correction
10RELION3.1initial Euler assignmentbeta
11RELION3.1final Euler assignmentbeta
13RELION3.13D reconstructionbeta
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 61157 / Symmetry type: POINT

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