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Open data
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Basic information
| Entry | Database: PDB / ID: 8pw7 | |||||||||
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| Title | A 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 / response to cobalamin / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / mesenchymal stem cell proliferation / reproductive system development / blastocyst hatching ...Complex IV assembly / response to D-galactosamine / Complex III assembly / TP53 Regulates Metabolic Genes / response to cobalamin / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / mesenchymal stem cell proliferation / reproductive system development / blastocyst hatching / sperm glycocalyx / perinuclear theca / psychomotor behavior / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / RHOG GTPase cycle / Mitochondrial ribosome-associated quality control / Cytoprotection by HMOX1 / circulatory system development / Mitochondrial translation termination / Respiratory electron transport / respiratory chain complex IV assembly / response to mercury ion / mesenchymal stem cell differentiation / subthalamus development / pons development / protein insertion into mitochondrial inner membrane / response to light intensity / respiratory system process / cerebellar Purkinje cell layer development / : / mitochondrial respiratory chain complex III assembly / mitochondrial processing peptidase complex / sperm head-tail coupling apparatus / thalamus development / adult walking behavior / Mitochondrial protein degradation / pyramidal neuron development / respiratory chain complex IV / stem cell division / response to alkaloid / response to glucagon / mitochondrial large ribosomal subunit assembly / mitochondrial ATP synthesis coupled electron transport / protein lipoylation / cytochrome complex assembly / cellular response to oxygen levels / adult behavior / mitochondrial [2Fe-2S] assembly complex / mitochondrial large ribosomal subunit binding / neural precursor cell proliferation / ubiquinone biosynthetic process / respiratory chain complex / gliogenesis / cytochrome-c oxidase / respiratory chain complex III / negative regulation of non-canonical NF-kappaB signal transduction / cellular respiration / response to hydroperoxide / cardiac muscle tissue development / quinol-cytochrome-c reductase / mitochondrial electron transport, cytochrome c to oxygen / oxidative phosphorylation / positive regulation of mitochondrial membrane potential / [2Fe-2S] cluster assembly / quinol-cytochrome-c reductase activity / oxygen sensor activity / sperm principal piece / cellular response to glucocorticoid stimulus / midbrain development / multicellular organism growth / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / iron-sulfur cluster assembly / response to copper ion / hypothalamus development / dopamine metabolic process / sperm end piece / NADH:ubiquinone reductase (H+-translocating) / ubiquinone binding / animal organ regeneration / mitochondrial electron transport, NADH to ubiquinone / positive regulation of ATP biosynthetic process / proton motive force-driven mitochondrial ATP synthesis / electron transport coupled proton transport / acyl binding / regulation of protein phosphorylation / neuron development / mitochondrial respiratory chain complex I assembly / response to hyperoxia / response to electrical stimulus / response to cadmium ion / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / cerebellum development / reactive oxygen species metabolic process / respiratory chain complex I / positive regulation of execution phase of apoptosis / NADH dehydrogenase (ubiquinone) activity Similarity search - Function | |||||||||
| Biological species | ![]() | |||||||||
| Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.5 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 | 8pw7.cif.gz | 2.9 MB | Display | PDBx/mmCIF format |
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| PDB format | pdb8pw7.ent.gz | Display | PDB format | |
| PDBx/mmJSON format | 8pw7.json.gz | Tree view | PDBx/mmJSON format | |
| Others | Other downloads |
-Validation report
| Arichive directory | https://data.pdbj.org/pub/pdb/validation_reports/pw/8pw7 ftp://data.pdbj.org/pub/pdb/validation_reports/pw/8pw7 | HTTPS FTP |
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-Related structure data
| Related structure data | ![]() 17991MC ![]() 8pw5C ![]() 8pw6C ![]() 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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| 1 |
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Components
+Cytochrome c oxidase subunit ... , 13 types, 13 molecules nopqrstuvxywz
+Cytochrome b-c1 complex subunit ... , 8 types, 17 molecules ALBMEPTFQGRHSJUKV
+Protein , 4 types, 7 molecules CNDO3T1U1
+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, 90 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: A respirasome from murine liver / Type: COMPLEX / Entity ID: #1-#67 / 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 material: COPPER / 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: 3.5 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 57506 / Algorithm: FOURIER SPACE / 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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| Refine LS restraints |
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