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- PDB-9dm1: Mycobacterial supercomplex malate:quinone oxidoreductase assembly -
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Open data
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Basic information
Entry | Database: PDB / ID: 9dm1 | |||||||||||||||||||||||||||||||||
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Title | Mycobacterial supercomplex malate:quinone oxidoreductase assembly | |||||||||||||||||||||||||||||||||
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![]() | MEMBRANE PROTEIN / Electron transport chain / mycobacterial CIII2CIV2 supercomplex | |||||||||||||||||||||||||||||||||
Function / homology | ![]() malate dehydrogenase (quinone) / L-malate dehydrogenase (quinone) activity / 2-hydroxyglutarate dehydrogenase activity / aerobic electron transport chain / cytochrome-c oxidase / oxidative phosphorylation / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / superoxide dismutase ...malate dehydrogenase (quinone) / L-malate dehydrogenase (quinone) activity / 2-hydroxyglutarate dehydrogenase activity / aerobic electron transport chain / cytochrome-c oxidase / oxidative phosphorylation / quinol-cytochrome-c reductase / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / superoxide dismutase / superoxide dismutase activity / electron transport coupled proton transport / oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen / ATP synthesis coupled electron transport / tricarboxylic acid cycle / respiratory electron transport chain / monooxygenase activity / electron transport chain / 2 iron, 2 sulfur cluster binding / iron ion binding / copper ion binding / heme binding / metal ion binding / membrane / plasma membrane Similarity search - Function | |||||||||||||||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||||||||||||||||||||||||||
![]() | Di Trani, J.M. / Rubinstein, J.L. | |||||||||||||||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Cryo-EM of native membranes reveals an intimate connection between the Krebs cycle and aerobic respiration in mycobacteria. Authors: Justin M Di Trani / Jiacheng Yu / Gautier M Courbon / Ana Paula Lobez Rodriguez / Chen-Yi Cheung / Yingke Liang / Claire E Coupland / Stephanie A Bueler / Gregory M Cook / Peter Brzezinski / ...Authors: Justin M Di Trani / Jiacheng Yu / Gautier M Courbon / Ana Paula Lobez Rodriguez / Chen-Yi Cheung / Yingke Liang / Claire E Coupland / Stephanie A Bueler / Gregory M Cook / Peter Brzezinski / John L Rubinstein / ![]() ![]() ![]() ![]() Abstract: To investigate the structure of the mycobacterial oxidative phosphorylation machinery, we prepared inverted membrane vesicles from , enriched for vesicles containing complexes of interest, and imaged ...To investigate the structure of the mycobacterial oxidative phosphorylation machinery, we prepared inverted membrane vesicles from , enriched for vesicles containing complexes of interest, and imaged the vesicles with electron cryomicroscopy. We show that this analysis allows determination of the structure of both mycobacterial ATP synthase and the supercomplex of respiratory complexes III and IV in their native membrane. The latter structure reveals that the enzyme malate:quinone oxidoreductase (Mqo) physically associates with the respiratory supercomplex, an interaction that is lost on extraction of the proteins from the lipid bilayer. Mqo catalyzes an essential reaction in the Krebs cycle, and in vivo survival of mycobacterial pathogens is compromised when its activity is absent. We show with high-speed spectroscopy that the Mqo:supercomplex interaction enables rapid electron transfer from malate to the supercomplex. Further, the respiratory supercomplex is necessary for malate-driven, but not NADH-driven, electron transport chain activity and oxygen consumption. Together, these findings indicate a connection between the Krebs cycle and aerobic respiration that directs electrons along a single branch of the mycobacterial electron transport chain. | |||||||||||||||||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 1.1 MB | Display | ![]() |
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PDB format | ![]() | 937.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Summary document | ![]() | 3.4 MB | Display | ![]() |
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Full document | ![]() | 3.6 MB | Display | |
Data in XML | ![]() | 211.8 KB | Display | |
Data in CIF | ![]() | 285.6 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 46995MC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Cytochrome c oxidase subunit ... , 2 types, 4 molecules RLUa
#1: Protein | Mass: 63296.922 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: A0A0K0XH24, cytochrome-c oxidase #7: Protein | Mass: 8365.549 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7FQK8 |
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-Cytochrome bc1 complex cytochrome ... , 2 types, 4 molecules EFOI
#2: Protein | Mass: 59110.758 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7FGS8, quinol-cytochrome-c reductase #10: Protein | Mass: 23183.990 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7FPH1, quinol-cytochrome-c reductase |
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-Protein , 7 types, 13 molecules DGTZVbPJcWYMA
#3: Protein | Mass: 21221.863 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() References: UniProt: I7G2H6, superoxide dismutase #6: Protein | Mass: 15177.424 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7FPH7, cytochrome-c oxidase #8: Protein | Mass: 14808.747 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: A0R1B5 #9: Protein | Mass: 11329.909 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 #11: Protein | Mass: 16412.873 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7GFE1 #12: Protein | Mass: 42210.484 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7GD61 #13: Protein | | Mass: 54970.414 Da / Num. of mol.: 1 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: A0QVL2, malate dehydrogenase (quinone) |
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-Cytochrome aa3 subunit ... , 2 types, 4 molecules QKSX
#4: Protein | Mass: 35201.008 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: I7GD63, cytochrome-c oxidase #5: Protein | Mass: 22196.883 Da / Num. of mol.: 2 / Source method: isolated from a natural source Source: (natural) ![]() Strain: ATCC 700084 / mc(2)155 / References: UniProt: A0R049 |
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-Non-polymers , 11 types, 66 molecules 




















#14: Chemical | ChemComp-CU / #15: Chemical | ChemComp-HEA / #16: Chemical | ChemComp-CDL / #17: Chemical | ChemComp-HEM / #18: Chemical | ChemComp-MQ9 / #19: Chemical | ChemComp-9Y0 / ( #20: Chemical | ChemComp-PLM / #21: Chemical | ChemComp-9XX / ( #22: Chemical | ChemComp-HEC / #23: Chemical | ChemComp-9YF / ( #24: Chemical | |
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-Details
Has ligand of interest | N |
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Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Respiratory Complex Mqo:CIII2CIV2SoD2 from Mycobacterium smegmatis Type: COMPLEX / Entity ID: #1-#13 / Source: NATURAL |
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Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.5 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 900 nm |
Image recording | Electron dose: 41.5 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) |
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Processing
CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION |
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3D reconstruction | Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 145585 / Symmetry type: POINT |