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Yorodumi- PDB-9qef: Respiratory supercomplex from Mycobacterium smegmatis with decylu... -
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Open data
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Basic information
| Entry | Database: PDB / ID: 9qef | ||||||||||||||||||||||||
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| Title | Respiratory supercomplex from Mycobacterium smegmatis with decylubiquinone | ||||||||||||||||||||||||
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Keywords | ELECTRON TRANSPORT / RESPIRATORY SUPERCOMPLEX / MEMBRANE PROTEIN / ACTINOBACTERIA | ||||||||||||||||||||||||
| Function / homology | Function and homology informationaerobic 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 ...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 / 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 | Mycolicibacterium smegmatis (bacteria) | ||||||||||||||||||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.5 Å | ||||||||||||||||||||||||
Authors | Kovalova, T. / Krol, S. / Brzezinski, P. / Hogbom, M. | ||||||||||||||||||||||||
| Funding support | Sweden, 1items
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Citation | Journal: Commun Biol / Year: 2025Title: Mycobacterial respiratory chain enzymes and growth are inhibited by decylubiquinone. Authors: Sylwia Król / Terezia Kovalova / Mateusz Janczak / Sadaf Kalsum / Mira Akber / Martin Högbom / Susanna Brighenti / Pia Ädelroth / Peter Brzezinski / ![]() Abstract: Aerobic organisms obtain energy by linking electron transfer from NADH to O, through the respiratory chain, to transmembrane proton translocation. In mycobacteria the respiratory chain is branched; ...Aerobic organisms obtain energy by linking electron transfer from NADH to O, through the respiratory chain, to transmembrane proton translocation. In mycobacteria the respiratory chain is branched; the membrane-bound electron carrier menaquinol (MQH) donates electrons either to the O-reducing cytochrome bd or a supercomplex that is composed of a complex (C) III dimer flanked by two CIVs. Here, we measured the dimethyl-naphthoquinone (DMNQH a menaquinol analogue) oxidation:O reduction activities of the CIIICIV supercomplex and cytochrome bd in the presence of an analogue (decylubiquinone, DCQ) of the mammalian electron carrier, ubiquinol. The data show that DCQH inhibits both the CIIICIV and cytochrome bd activities, suggesting that DCQ/DCQH interferes with both branches of the respiratory chain. Cryo-EM data of the M. smegmatis supercomplex shows that oxidized DCQ binds in the electron donor site (Q) of CIII. Accordingly, growth of M. smegmatis cells was impaired in the presence of DCQ. Remarkably, DCQ also impairs intracellular growth of virulent M. tuberculosis cells in human primary macrophages suggesting that the compound could potentially be used as an adjuvant during tuberculosis disease treatment. | ||||||||||||||||||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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| PDBx/mmCIF format | 9qef.cif.gz | 1.2 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb9qef.ent.gz | 1007.1 KB | Display | PDB format |
| PDBx/mmJSON format | 9qef.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 9qef_validation.pdf.gz | 5.3 MB | Display | wwPDB validaton report |
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| Full document | 9qef_full_validation.pdf.gz | 5.6 MB | Display | |
| Data in XML | 9qef_validation.xml.gz | 214.4 KB | Display | |
| Data in CIF | 9qef_validation.cif.gz | 287 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/qe/9qef ftp://data.pdbj.org/pub/pdb/validation_reports/qe/9qef | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 53065MC M: map data used to model this data C: citing same article ( |
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| Similar structure data | Similarity search - Function & homology F&H Search |
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Assembly
| Deposited unit | ![]()
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Components
-Cytochrome bc1 complex cytochrome c ... , 2 types, 4 molecules OCMG
| #1: Protein | Mass: 29109.945 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4261 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R050, quinol-cytochrome-c reductase#2: Protein | Mass: 44869.395 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4261 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R051, quinol-cytochrome-c reductase |
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-Protein , 9 types, 18 molecules NHPISJQXVaWbYcEAFB
| #3: Protein | Mass: 61514.281 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4263 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R052, quinol-cytochrome-c reductase#4: Protein | Mass: 11329.909 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_2575 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0QVH4#5: Protein | Mass: 22196.883 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4260 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R049#8: Protein | Mass: 38077.465 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4268 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R057, cytochrome-c oxidase#10: Protein | Mass: 15910.971 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4692, MSMEI_4575 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R1B5#11: Protein | Mass: 19118.969 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_6078 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R562#12: Protein | Mass: 23232.375 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: sodC, MSMEG_0835 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0QQQ1, superoxide dismutase#13: Protein | Mass: 13027.842 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: BIN_B_02039 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0A653FDI6#14: Protein | Mass: 7075.939 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEI_5553 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: I7FT03 |
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-Cytochrome c oxidase ... , 3 types, 6 molecules TKRLUZ
| #6: Protein | Mass: 15177.424 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4267 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R056, cytochrome-c oxidase#7: Protein | Mass: 64162.965 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: D806_022970 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0A2U9PNL2, cytochrome-c oxidase#9: Protein | Mass: 8365.549 Da / Num. of mol.: 2 Source method: isolated from a genetically manipulated source Source: (gene. exp.) Mycolicibacterium smegmatis (bacteria) / Gene: MSMEG_4693 / Production host: Mycolicibacterium smegmatis (bacteria) / References: UniProt: A0R1B6 |
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-Non-polymers , 19 types, 690 molecules 


































| #15: Chemical | ChemComp-HEC / #16: Chemical | ChemComp-MQ9 / #17: Chemical | ChemComp-WUO / Mass: 1415.802 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C72H135O24P #18: Chemical | #19: Chemical | |
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Mycolicibacterium smegmatis (bacteria)
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