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- PDB-8a1u: Sodium pumping NADH-quinone oxidoreductase with substrates NADH and Q2 -

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Basic information

Entry
Database: PDB / ID: 8a1u
TitleSodium pumping NADH-quinone oxidoreductase with substrates NADH and Q2
Components(Na(+)-translocating NADH-quinone reductase subunit ...) x 6
KeywordsMEMBRANE PROTEIN / NADH / quinone
Function / homology
Function and homology information


NADH:ubiquinone reductase (Na+-transporting) / Gram-negative-bacterium-type cell wall / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / sodium ion transport / respiratory electron transport chain / 2 iron, 2 sulfur cluster binding / transmembrane transport / FMN binding / electron transfer activity / metal ion binding / plasma membrane
Similarity search - Function
Na(+)-translocating NADH-quinone reductase subunit B / Na(+)-translocating NADH-quinone reductase subunit E / Na(+)-translocating NADH-quinone reductase subunit D / Na(+)-translocating NADH-quinone reductase subunit A / Na(+)-translocating NADH-quinone reductase subunit A, C-terminal domain / : / : / NqrA N-terminal barrel-sandwich hybrid domain / NQRA C-terminal domain / NqrA second alpha/beta domain ...Na(+)-translocating NADH-quinone reductase subunit B / Na(+)-translocating NADH-quinone reductase subunit E / Na(+)-translocating NADH-quinone reductase subunit D / Na(+)-translocating NADH-quinone reductase subunit A / Na(+)-translocating NADH-quinone reductase subunit A, C-terminal domain / : / : / NqrA N-terminal barrel-sandwich hybrid domain / NQRA C-terminal domain / NqrA second alpha/beta domain / Na(+)-translocating NADH-quinone reductase subunit C / Na(+)-translocating NADH-quinone reductase subunit F / NqrDE/RnfAE / Ion-translocating oxidoreductase NqrB/RnfD / : / Rnf-Nqr subunit, membrane protein / NQR2, RnfD, RnfE family / FMN-binding / FMN-binding domain / FMN_bind / Flavoprotein pyridine nucleotide cytochrome reductase-like, FAD-binding domain / Oxidoreductase FAD-binding domain / 2Fe-2S iron-sulfur cluster binding domain / Beta-grasp domain superfamily / 2Fe-2S ferredoxin-type iron-sulfur binding domain profile. / 2Fe-2S ferredoxin-type iron-sulfur binding domain / 2Fe-2S ferredoxin-like superfamily / Oxidoreductase FAD/NAD(P)-binding / Oxidoreductase NAD-binding domain / FAD-binding domain, ferredoxin reductase-type / Ferredoxin-NADP reductase (FNR), nucleotide-binding domain / Ferredoxin reductase-type FAD binding domain profile. / Riboflavin synthase-like beta-barrel
Similarity search - Domain/homology
1,2-Distearoyl-sn-glycerophosphoethanolamine / FLAVIN-ADENINE DINUCLEOTIDE / FE2/S2 (INORGANIC) CLUSTER / FLAVIN MONONUCLEOTIDE / 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE / RIBOFLAVIN / UBIQUINONE-2 / Na(+)-translocating NADH-quinone reductase subunit C / Na(+)-translocating NADH-quinone reductase subunit A / Na(+)-translocating NADH-quinone reductase subunit B ...1,2-Distearoyl-sn-glycerophosphoethanolamine / FLAVIN-ADENINE DINUCLEOTIDE / FE2/S2 (INORGANIC) CLUSTER / FLAVIN MONONUCLEOTIDE / 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE / RIBOFLAVIN / UBIQUINONE-2 / Na(+)-translocating NADH-quinone reductase subunit C / Na(+)-translocating NADH-quinone reductase subunit A / Na(+)-translocating NADH-quinone reductase subunit B / Na(+)-translocating NADH-quinone reductase subunit D / Na(+)-translocating NADH-quinone reductase subunit E / Na(+)-translocating NADH-quinone reductase subunit F
Similarity search - Component
Biological speciesVibrio cholerae (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.86 Å
AuthorsHau, J.-L. / Kaltwasser, S. / Vonck, J. / Fritz, G. / Steuber, J.
Funding support Germany, 1items
OrganizationGrant numberCountry
German Research Foundation (DFG)FR 1488/8-2 Germany
CitationJournal: Nat Struct Mol Biol / Year: 2023
Title: Conformational coupling of redox-driven Na-translocation in Vibrio cholerae NADH:quinone oxidoreductase.
Authors: Jann-Louis Hau / Susann Kaltwasser / Valentin Muras / Marco S Casutt / Georg Vohl / Björn Claußen / Wojtek Steffen / Alexander Leitner / Eckhard Bill / George E Cutsail / Serena DeBeer / ...Authors: Jann-Louis Hau / Susann Kaltwasser / Valentin Muras / Marco S Casutt / Georg Vohl / Björn Claußen / Wojtek Steffen / Alexander Leitner / Eckhard Bill / George E Cutsail / Serena DeBeer / Janet Vonck / Julia Steuber / Günter Fritz /
Abstract: In the respiratory chain, NADH oxidation is coupled to ion translocation across the membrane to build up an electrochemical gradient. In the human pathogen Vibrio cholerae, the sodium-pumping NADH: ...In the respiratory chain, NADH oxidation is coupled to ion translocation across the membrane to build up an electrochemical gradient. In the human pathogen Vibrio cholerae, the sodium-pumping NADH:quinone oxidoreductase (Na-NQR) generates a sodium gradient by a so far unknown mechanism. Here we show that ion pumping in Na-NQR is driven by large conformational changes coupling electron transfer to ion translocation. We have determined a series of cryo-EM and X-ray structures of the Na-NQR that represent snapshots of the catalytic cycle. The six subunits NqrA, B, C, D, E, and F of Na-NQR harbor a unique set of cofactors that shuttle the electrons from NADH twice across the membrane to quinone. The redox state of a unique intramembranous [2Fe-2S] cluster orchestrates the movements of subunit NqrC, which acts as an electron transfer switch. We propose that this switching movement controls the release of Na from a binding site localized in subunit NqrB.
History
DepositionJun 2, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0Sep 20, 2023Provider: repository / Type: Initial release
Revision 1.1Sep 27, 2023Group: Database references / Category: citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation.title / _citation_author.name
Revision 1.2Nov 22, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID
Revision 1.3Nov 6, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Na(+)-translocating NADH-quinone reductase subunit A
B: Na(+)-translocating NADH-quinone reductase subunit B
C: Na(+)-translocating NADH-quinone reductase subunit C
D: Na(+)-translocating NADH-quinone reductase subunit D
E: Na(+)-translocating NADH-quinone reductase subunit E
F: Na(+)-translocating NADH-quinone reductase subunit F
hetero molecules


Theoretical massNumber of molelcules
Total (without water)221,59723
Polymers213,6176
Non-polymers7,98017
Water3,369187
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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Na(+)-translocating NADH-quinone reductase subunit ... , 6 types, 6 molecules ABCDEF

#1: Protein Na(+)-translocating NADH-quinone reductase subunit A / Na(+)-NQR subunit A / Na(+)-translocating NQR subunit A / NQR complex subunit A / NQR-1 subunit A


Mass: 51125.391 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Subunit NqrA and N-terminal His6-tag and cleavage site for HRV-3C protease
Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrA, VC_2295 / Production host: Vibrio cholerae (bacteria)
References: UniProt: Q9KPS1, NADH:ubiquinone reductase (Na+-transporting)
#2: Protein Na(+)-translocating NADH-quinone reductase subunit B / Na(+)-NQR subunit B / Na(+)-translocating NQR subunit B / NQR complex subunit B / NQR-1 subunit B


Mass: 45390.883 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: N-terminal residues in model not resolved. / Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrB, VC_2294 / Production host: Vibrio cholerae (bacteria)
References: UniProt: Q9KPS2, NADH:ubiquinone reductase (Na+-transporting)
#3: Protein Na(+)-translocating NADH-quinone reductase subunit C / Na(+)-NQR subunit C / Na(+)-translocating NQR subunit C / NQR complex subunit C / NQR-1 subunit C


Mass: 27652.270 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrC, VC_2293 / Production host: Vibrio cholerae (bacteria)
References: UniProt: P0C6E0, NADH:ubiquinone reductase (Na+-transporting)
#4: Protein Na(+)-translocating NADH-quinone reductase subunit D / Na(+)-NQR subunit D / Na(+)-translocating NQR subunit D / NQR complex subunit D / NQR-1 subunit D


Mass: 22853.217 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: Residues at the N-terminus and at the C-terminus were not resolved in the density and are not part of the model.
Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrD, VC_2292 / Production host: Vibrio cholerae (bacteria)
References: UniProt: Q9X4Q6, NADH:ubiquinone reductase (Na+-transporting)
#5: Protein Na(+)-translocating NADH-quinone reductase subunit E / Na(+)-NQR subunit E / Na(+)-translocating NQR subunit E / NQR complex subunit E / NQR-1 subunit E


Mass: 21481.678 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrE, VC_2291 / Production host: Vibrio cholerae (bacteria)
References: UniProt: Q9X4Q7, NADH:ubiquinone reductase (Na+-transporting)
#6: Protein Na(+)-translocating NADH-quinone reductase subunit F / Na(+)-NQR subunit F / Na(+)-translocating NQR subunit F / NQR complex subunit F / NQR-1 subunit F


Mass: 45113.492 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Details: N-terminal and C-terminal residues were not resolved in the density and are not part of the model.
Source: (gene. exp.) Vibrio cholerae (bacteria) / Gene: nqrF, VC_2290 / Production host: Vibrio cholerae (bacteria)
References: UniProt: Q9X4Q8, NADH:ubiquinone reductase (Na+-transporting)

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Sugars , 1 types, 3 molecules

#9: Sugar ChemComp-LMT / DODECYL-BETA-D-MALTOSIDE


Type: D-saccharide / Mass: 510.615 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C24H46O11 / Comment: detergent*YM

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Non-polymers , 9 types, 201 molecules

#7: Chemical ChemComp-FMN / FLAVIN MONONUCLEOTIDE / RIBOFLAVIN MONOPHOSPHATE


Mass: 456.344 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C17H21N4O9P
#8: Chemical ChemComp-RBF / RIBOFLAVIN / RIBOFLAVINE / VITAMIN B2


Mass: 376.364 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C17H20N4O6
#10: Chemical
ChemComp-3PE / 1,2-Distearoyl-sn-glycerophosphoethanolamine / 3-SN-PHOSPHATIDYLETHANOLAMINE / 1,2-DIACYL-SN-GLYCERO-3-PHOSPHOETHANOLAMINE


Mass: 748.065 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C41H82NO8P / Comment: phospholipid*YM
#11: Chemical ChemComp-UQ2 / UBIQUINONE-2


Mass: 318.407 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C19H26O4
#12: Chemical ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Na
#13: Chemical ChemComp-FES / FE2/S2 (INORGANIC) CLUSTER


Mass: 175.820 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Formula: Fe2S2
#14: Chemical ChemComp-FAD / FLAVIN-ADENINE DINUCLEOTIDE


Mass: 785.550 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C27H33N9O15P2 / Comment: FAD*YM
#15: Chemical ChemComp-NAI / 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE / NADH


Mass: 665.441 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C21H29N7O14P2
#16: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 187 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestN
Has protein modificationY

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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: NQR complex with substrates NADH and Q2 / Type: COMPLEX / Entity ID: #1-#6 / Source: RECOMBINANT
Molecular weightValue: 0.22 MDa / Experimental value: YES
Source (natural)Organism: Vibrio cholerae (bacteria)
Source (recombinant)Organism: Vibrio cholerae (bacteria)
Buffer solutionpH: 7.6
SpecimenConc.: 4 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 400 divisions/in. / Grid type: C-flat-1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 276 K

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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 FIELD / Nominal magnification: 215000 X / Calibrated magnification: 244328 X / Nominal defocus max: 2100 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 4 sec. / Electron dose: 40 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 9592
EM imaging opticsEnergyfilter name: TFS Selectris X / Energyfilter slit width: 7 eV

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Processing

EM software
IDNameVersionCategory
2EPUimage acquisition
4CTFFIND4CTF correction
9PHENIXmodel refinement
10RELION4initial Euler assignment
11RELION4final Euler assignment
13RELION43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 549586
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.86 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 435715 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 4P6V

4p6v
PDB Unreleased entry


Accession code: 4P6V / Source name: PDB / Type: experimental model

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