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Open data
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Basic information
| Entry | Database: PDB / ID: 8pw6 | |||||||||
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| Title | C respirasome from murine liver | |||||||||
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Keywords | MEMBRANE PROTEIN / Respiratory chain super complex / mammalian mitochondria | |||||||||
| Function / homology | Function and homology informationComplex IV assembly / response to D-galactosamine / Complex III assembly / TP53 Regulates Metabolic Genes / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / RHOG GTPase cycle ...Complex IV assembly / response to D-galactosamine / Complex III assembly / TP53 Regulates Metabolic Genes / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / RHOG GTPase cycle / response to mercury ion / Cytoprotection by HMOX1 / Respiratory electron transport / respiratory chain complex IV assembly / protein insertion into mitochondrial inner membrane / subthalamus development / pons development / response to cobalamin / aerobic electron transport chain / cerebellar Purkinje cell layer development / blastocyst hatching / mitochondrial respiratory chain complex III assembly / respiratory system process / psychomotor behavior / pyramidal neuron development / response to alkaloid / cellular respiration / Mitochondrial protein degradation / respiratory chain complex IV / thalamus development / response to light intensity / iron-sulfur cluster assembly complex / cellular response to oxygen levels / mesenchymal stem cell proliferation / reproductive system development / mitochondrial large ribosomal subunit binding / respiratory chain complex / gliogenesis / mitochondrial [2Fe-2S] assembly complex / cytochrome-c oxidase / respiratory chain complex III / mesenchymal stem cell differentiation / circulatory system development / negative regulation of non-canonical NF-kappaB signal transduction / oxidative phosphorylation / quinol-cytochrome-c reductase / response to glucagon / adult walking behavior / mitochondrial electron transport, cytochrome c to oxygen / cardiac muscle tissue development / positive regulation of mitochondrial membrane potential / response to hydroperoxide / neural precursor cell proliferation / [2Fe-2S] cluster assembly / oxygen sensor activity / quinol-cytochrome-c reductase activity / cellular response to glucocorticoid stimulus / cytochrome-c oxidase activity / response to copper ion / stem cell division / NADH dehydrogenase activity / mitochondrial electron transport, ubiquinol to cytochrome c / iron-sulfur cluster assembly / hypothalamus development / midbrain development / electron transport coupled proton transport / dopamine metabolic process / adult behavior / NADH:ubiquinone reductase (H+-translocating) / mitochondrial ATP synthesis coupled electron transport / positive regulation of ATP biosynthetic process / mitochondrial respiratory chain complex I assembly / proton motive force-driven mitochondrial ATP synthesis / mitochondrial electron transport, NADH to ubiquinone / response to electrical stimulus / response to hyperoxia / animal organ regeneration / respiratory chain complex I / positive regulation of execution phase of apoptosis / response to cadmium ion / NADH dehydrogenase (ubiquinone) activity / neuron development / quinone binding / cellular response to interferon-beta / ATP synthesis coupled electron transport / negative regulation of reactive oxygen species biosynthetic process / response to hormone / extrinsic apoptotic signaling pathway / cellular response to retinoic acid / tricarboxylic acid cycle / lactation / neurogenesis / Neutrophil degranulation / visual perception / response to nutrient / reactive oxygen species metabolic process / muscle contraction / aerobic respiration / cerebellum development / central nervous system development Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||
Authors | Vercellino, I. / Sazanov, L.A. | |||||||||
| Funding support | European Union, 1items
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Citation | Journal: Nat Struct Mol Biol / Year: 2024Title: SCAF1 drives the compositional diversity of mammalian respirasomes. Authors: Irene Vercellino / Leonid A Sazanov / ![]() Abstract: Supercomplexes of the respiratory chain are established constituents of the oxidative phosphorylation system, but their role in mammalian metabolism has been hotly debated. Although recent studies ...Supercomplexes of the respiratory chain are established constituents of the oxidative phosphorylation system, but their role in mammalian metabolism has been hotly debated. Although recent studies have shown that different tissues/organs are equipped with specific sets of supercomplexes, depending on their metabolic needs, the notion that supercomplexes have a role in the regulation of metabolism has been challenged. However, irrespective of the mechanistic conclusions, the composition of various high molecular weight supercomplexes remains uncertain. Here, using cryogenic electron microscopy, we demonstrate that mammalian (mouse) tissues contain three defined types of 'respirasome', supercomplexes made of CI, CIII and CIV. The stoichiometry and position of CIV differs in the three respirasomes, of which only one contains the supercomplex-associated factor SCAF1, whose involvement in respirasome formation has long been contended. Our structures confirm that the 'canonical' respirasome (the C-respirasome, CICIIICIV) does not contain SCAF1, which is instead associated to a different respirasome (the CS-respirasome), containing a second copy of CIV. We also identify an alternative respirasome (A-respirasome), with CIV bound to the 'back' of CI, instead of the 'toe'. This structural characterization of mouse mitochondrial supercomplexes allows us to hypothesize a mechanistic basis for their specific role in different metabolic conditions. #1: Journal: Acta Crystallogr., Sect. D: Biol. Crystallogr. / Year: 2018Title: Real-space refinement in PHENIX for cryo-EM and crystallography Authors: Afonine, P.V. / Adams, P.D. | |||||||||
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Structure visualization
| Structure viewer | Molecule: Molmil Jmol/JSmol |
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Downloads & links
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Download
| PDBx/mmCIF format | 8pw6.cif.gz | 2.9 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb8pw6.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 8pw6.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Summary document | 8pw6_validation.pdf.gz | 4.4 MB | Display | wwPDB validaton report |
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| Full document | 8pw6_full_validation.pdf.gz | 4.5 MB | Display | |
| Data in XML | 8pw6_validation.xml.gz | 337.7 KB | Display | |
| Data in CIF | 8pw6_validation.cif.gz | 520.5 KB | Display | |
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/pw/8pw6 ftp://data.pdbj.org/pub/pdb/validation_reports/pw/8pw6 | HTTPS FTP |
-Related structure data
| Related structure data | ![]() 17990MC ![]() 8pw5C ![]() 8pw7C ![]() 8rgpC ![]() 8rgqC ![]() 8rgrC ![]() 8rgtC 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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Links
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Assembly
| Deposited unit | ![]()
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Components
+Cytochrome b-c1 complex subunit ... , 8 types, 17 molecules ALBMEPTFQGRHSJUKV
+Protein , 4 types, 7 molecules CNDO3T1U1
+Cytochrome c oxidase subunit ... , 13 types, 13 molecules nopqrstuvxyzw
+NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 7 types, 7 molecules 6C1D19Q17e1
+NADH dehydrogenase [ubiquinone] flavoprotein ... , 3 types, 3 molecules 21s1
+NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 12 types, 12 molecules P1S1V1W1q1r1O1X1Y1Z1a1b1
+NADH-ubiquinone oxidoreductase chain ... , 7 types, 7 molecules A1H1J1K1L1M1N1
+NADH dehydrogenase [ubiquinone] 1 subunit ... , 2 types, 2 molecules c1d1
+NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit ... , 11 types, 11 molecules f1g1h1i1j1k1l1m1n1o1p1
+Non-polymers , 19 types, 93 molecules 




































+Details
-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: C respirasome from murine liver / Type: COMPLEX / Entity ID: #1-#10, #24-#67, #11-#23 / Source: NATURAL | ||||||||||||||||||||
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| Molecular weight | Value: 1.7 MDa / Experimental value: NO | ||||||||||||||||||||
| Source (natural) | Organism: ![]() | ||||||||||||||||||||
| Buffer solution | pH: 7.7 | ||||||||||||||||||||
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| Specimen | Conc.: 0.3 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES | ||||||||||||||||||||
| Specimen support | Grid type: Quantifoil R0.6/1 | ||||||||||||||||||||
| Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 K |
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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: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM |
| Electron lens | Mode: BRIGHT FIELD / Nominal magnification: 81000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm / Calibrated defocus min: 500 nm / Calibrated defocus max: 2500 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE |
| Specimen holder | Cryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER |
| Image recording | Average exposure time: 4.4 sec. / Electron dose: 80 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 9453 |
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Processing
| EM software | Name: PHENIX / Version: 1.19_4092: / Category: model refinement | ||||||||||||||||||||||||
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| CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
| Particle selection | Num. of particles selected: 1758187 | ||||||||||||||||||||||||
| Symmetry | Point symmetry: C1 (asymmetric) | ||||||||||||||||||||||||
| 3D reconstruction | Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 103207 / Num. of class averages: 1 / Symmetry type: POINT | ||||||||||||||||||||||||
| Atomic model building | Protocol: RIGID BODY FIT / Details: initial fitting done in chimera | ||||||||||||||||||||||||
| Atomic model building | 3D fitting-ID: 1 / Source name: PDB / Type: experimental model
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