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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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![]() | MEMBRANE PROTEIN / Respiratory chain super complex / mammalian mitochondria | |||||||||
Function / homology | ![]() Complex IV assembly / response to D-galactosamine / Complex III assembly / TP53 Regulates Metabolic Genes / subthalamus development / pons development / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / mesenchymal stem cell proliferation / reproductive system development ...Complex IV assembly / response to D-galactosamine / Complex III assembly / TP53 Regulates Metabolic Genes / subthalamus development / pons development / Mitochondrial protein import / response to injury involved in regulation of muscle adaptation / mesenchymal stem cell proliferation / reproductive system development / cerebellar Purkinje cell layer development / Protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Complex I biogenesis / respiratory chain complex IV assembly / RHOG GTPase cycle / response to mercury ion / Respiratory electron transport / Cytoprotection by HMOX1 / protein insertion into mitochondrial inner membrane / mesenchymal stem cell differentiation / circulatory system development / pyramidal neuron development / blastocyst hatching / thalamus development / mitochondrial respiratory chain complex III assembly / aerobic electron transport chain / respiratory system process / respiratory chain complex IV / psychomotor behavior / cellular respiration / Mitochondrial protein degradation / cellular response to oxygen levels / stem cell division / respiratory chain complex / response to light intensity / mitochondrial [2Fe-2S] assembly complex / iron-sulfur cluster assembly complex / mitochondrial large ribosomal subunit binding / response to copper ion / gliogenesis / response to alkaloid / cytochrome-c oxidase / respiratory chain complex III / oxidative phosphorylation / negative regulation of non-canonical NF-kappaB signal transduction / response to glucagon / cardiac muscle tissue development / neural precursor cell proliferation / quinol-cytochrome-c reductase / positive regulation of mitochondrial membrane potential / [2Fe-2S] cluster assembly / mitochondrial electron transport, cytochrome c to oxygen / adult walking behavior / cellular response to glucocorticoid stimulus / oxygen sensor activity / quinol-cytochrome-c reductase activity / response to hydroperoxide / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / hypothalamus development / iron-sulfur cluster assembly / positive regulation of ATP biosynthetic process / midbrain development / response to cobalamin / electron transport coupled proton transport / dopamine metabolic process / adult behavior / NADH:ubiquinone reductase (H+-translocating) / mitochondrial respiratory chain complex I assembly / positive regulation of execution phase of apoptosis / mitochondrial electron transport, NADH to ubiquinone / NADH dehydrogenase activity / proton motive force-driven mitochondrial ATP synthesis / respiratory chain complex I / response to hyperoxia / NADH dehydrogenase (ubiquinone) activity / neuron development / animal organ regeneration / quinone binding / response to electrical stimulus / cellular response to interferon-beta / response to cadmium ion / ATP synthesis coupled electron transport / cellular response to retinoic acid / negative regulation of reactive oxygen species biosynthetic process / extrinsic apoptotic signaling pathway / neurogenesis / response to hormone / tricarboxylic acid cycle / muscle contraction / lactation / Neutrophil degranulation / visual perception / cerebellum development / reactive oxygen species metabolic process / DNA damage response, signal transduction by p53 class mediator / aerobic respiration / regulation of mitochondrial membrane potential / hippocampus development Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å | |||||||||
![]() | Vercellino, I. / Sazanov, L.A. | |||||||||
Funding support | European Union, 1items
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![]() | ![]() Title: 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: ![]() Title: 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: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 2.9 MB | Display | ![]() |
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-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-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 ![]() |
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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 | ||||||||||||||||||||
Buffer component |
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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: ![]() |
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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