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- PDB-8ugh: In-situ structure of typeA supercomplex with lipids in respirator... -
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Open data
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Basic information
Entry | Database: PDB / ID: 8ugh | |||||||||
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Title | In-situ structure of typeA supercomplex with lipids in respiratory chain (composite) | |||||||||
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![]() | ELECTRON TRANSPORT / in-situ cryo-EM structure / mammalian / mitochondria / respiratory supercomplex / proton pumping / membrane protein | |||||||||
Function / homology | ![]() Complex IV assembly / Cytoprotection by HMOX1 / TP53 Regulates Metabolic Genes / Complex III assembly / subthalamus development / pons development / cerebellar Purkinje cell layer development / respiratory chain complex IV assembly / mitochondrial respirasome assembly / RHOG GTPase cycle ...Complex IV assembly / Cytoprotection by HMOX1 / TP53 Regulates Metabolic Genes / Complex III assembly / subthalamus development / pons development / cerebellar Purkinje cell layer development / respiratory chain complex IV assembly / mitochondrial respirasome assembly / RHOG GTPase cycle / pyramidal neuron development / Complex I biogenesis / thalamus development / Respiratory electron transport / Neutrophil degranulation / Mitochondrial protein degradation / respiratory chain complex IV / respiratory chain complex / cytochrome-c oxidase / respiratory chain complex III / oxidative phosphorylation / cardiac muscle tissue development / quinol-cytochrome-c reductase / oxidoreductase activity, acting on NAD(P)H / mitochondrial electron transport, cytochrome c to oxygen / quinol-cytochrome-c reductase activity / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / hypothalamus development / midbrain development / ubiquinone binding / electron transport coupled proton transport / NADH:ubiquinone reductase (H+-translocating) / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / NADH dehydrogenase activity / respiratory chain complex I / NADH dehydrogenase (ubiquinone) activity / quinone binding / ATP synthesis coupled electron transport / response to cAMP / enzyme regulator activity / positive regulation of vasoconstriction / reactive oxygen species metabolic process / aerobic respiration / hippocampus development / central nervous system development / respiratory electron transport chain / electron transport chain / brain development / metalloendopeptidase activity / mitochondrial intermembrane space / 2 iron, 2 sulfur cluster binding / NAD binding / fatty acid biosynthetic process / FMN binding / nervous system development / 4 iron, 4 sulfur cluster binding / electron transfer activity / mitochondrial inner membrane / oxidoreductase activity / nuclear body / mitochondrial matrix / copper ion binding / heme binding / mitochondrion / proteolysis / nucleoplasm / metal ion binding / membrane Similarity search - Function | |||||||||
Biological species | ![]() ![]() | |||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.1 Å | |||||||||
![]() | Zheng, W. / Zhang, K. / Zhu, J. | |||||||||
Funding support | ![]()
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![]() | ![]() Title: High-resolution in situ structures of mammalian respiratory supercomplexes. Authors: Wan Zheng / Pengxin Chai / Jiapeng Zhu / Kai Zhang / ![]() ![]() Abstract: Mitochondria play a pivotal part in ATP energy production through oxidative phosphorylation, which occurs within the inner membrane through a series of respiratory complexes. Despite extensive in ...Mitochondria play a pivotal part in ATP energy production through oxidative phosphorylation, which occurs within the inner membrane through a series of respiratory complexes. Despite extensive in vitro structural studies, determining the atomic details of their molecular mechanisms in physiological states remains a major challenge, primarily because of loss of the native environment during purification. Here we directly image porcine mitochondria using an in situ cryo-electron microscopy approach. This enables us to determine the structures of various high-order assemblies of respiratory supercomplexes in their native states. We identify four main supercomplex organizations: IIIIIV, IIIIIV, IIIIIV and IIIIIV, which potentially expand into higher-order arrays on the inner membranes. These diverse supercomplexes are largely formed by 'protein-lipids-protein' interactions, which in turn have a substantial impact on the local geometry of the surrounding membranes. Our in situ structures also capture numerous reactive intermediates within these respiratory supercomplexes, shedding light on the dynamic processes of the ubiquinone/ubiquinol exchange mechanism in complex I and the Q-cycle in complex III. Structural comparison of supercomplexes from mitochondria treated under different conditions indicates a possible correlation between conformational states of complexes I and III, probably in response to environmental changes. By preserving the native membrane environment, our approach enables structural studies of mitochondrial respiratory supercomplexes in reaction at high resolution across multiple scales, from atomic-level details to the broader subcellular context. | |||||||||
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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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 | ![]() 42225MC ![]() 8ud1C ![]() 8ueoC ![]() 8uepC ![]() 8ueqC ![]() 8uerC ![]() 8uesC ![]() 8uetC ![]() 8ueuC ![]() 8uevC ![]() 8uewC ![]() 8uexC ![]() 8ueyC ![]() 8uezC ![]() 8ugdC ![]() 8ugeC ![]() 8ugfC ![]() 8uggC ![]() 8ugiC ![]() 8ugjC ![]() 8ugkC ![]() 8uglC ![]() 8ugnC ![]() 8ugpC ![]() 8ugrC 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
+NADH-ubiquinone oxidoreductase chain ... , 7 types, 7 molecules 1A1H1J1K1L1M1N
+NADH dehydrogenase [ubiquinone] iron-sulfur protein ... , 7 types, 7 molecules 1B1C1D1I1Q1R1e
+NADH dehydrogenase [ubiquinone] flavoprotein ... , 3 types, 3 molecules 1E1F1s
+Protein , 4 types, 7 molecules 1G3C3P3D3Q3J3W
+NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit ... , 10 types, 10 molecules 1O1S1V1W1X1Y1a1b1q1r
+NADH:ubiquinone oxidoreductase subunit ... , 4 types, 5 molecules 1P1T1U1Z1j
+NADH dehydrogenase [ubiquinone] 1 subunit ... , 2 types, 2 molecules 1c1d
+NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit ... , 10 types, 10 molecules 1f1g1h1i1k1l1m1n1o1p
+Cytochrome b-c1 complex subunit ... , 7 types, 16 molecules 3A3N3B3O3E3I3R3V3F3S3G3T3H3U3X3Y
+Cytochrome c oxidase subunit ... , 14 types, 14 molecules 4A4B4C4D4E4F4G4H4I4J4K4L4M4N
+Non-polymers , 26 types, 226 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: In-situ cryo-EM structure of respiratory supercomplex by directly imaging mitochondria Type: COMPLEX / Entity ID: #1-#39, #41-#43 / Source: NATURAL |
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Source (natural) | Organism: ![]() ![]() |
Buffer solution | pH: 7 |
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: 3000 nm / Nominal defocus min: 1300 nm / Cs: 2.7 mm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) |
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Processing
EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 2.1 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 90000 / Symmetry type: POINT | ||||||||||||||||||||||||
Refine LS restraints |
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