+Open data
-Basic information
Entry | Database: EMDB / ID: EMD-6773 | |||||||||
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Title | Cryo-EM structure of human respiratory complex I | |||||||||
Map data | This map was obtained by sub-region refinement. | |||||||||
Sample |
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Function / homology | Function and homology information Complex I biogenesis / protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / mitochondrial [2Fe-2S] assembly complex / Respiratory electron transport / protein insertion into mitochondrial inner membrane / blastocyst hatching / Mitochondrial protein import / ubiquinone-6 biosynthetic process ...Complex I biogenesis / protein lipoylation / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / mitochondrial [2Fe-2S] assembly complex / Respiratory electron transport / protein insertion into mitochondrial inner membrane / blastocyst hatching / Mitochondrial protein import / ubiquinone-6 biosynthetic process / cellular response to oxygen levels / response to light intensity / iron-sulfur cluster assembly complex / : / mitochondrial large ribosomal subunit binding / gliogenesis / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / neural precursor cell proliferation / cardiac muscle tissue development / [2Fe-2S] cluster assembly / oxygen sensor activity / cellular respiration / cellular response to glucocorticoid stimulus / response to hydroperoxide / azurophil granule membrane / : / ubiquinone binding / sodium ion transport / iron-sulfur cluster assembly / NADH:ubiquinone reductase (H+-translocating) / positive regulation of execution phase of apoptosis / proton motive force-driven mitochondrial ATP synthesis / NADH dehydrogenase activity / mitochondrial ATP synthesis coupled electron transport / : / mitochondrial respiratory chain complex I assembly / mitochondrial electron transport, NADH to ubiquinone / endopeptidase activator activity / RHOG GTPase cycle / electron transport coupled proton transport / respiratory chain complex I / acyl binding / acyl carrier activity / NADH dehydrogenase (ubiquinone) activity / cellular response to interferon-beta / ATP synthesis coupled electron transport / quinone binding / : / cellular response to retinoic acid / extrinsic apoptotic signaling pathway / response to cAMP / Mitochondrial protein degradation / substantia nigra development / ionotropic glutamate receptor binding / aerobic respiration / respiratory electron transport chain / cerebellum development / reactive oxygen species metabolic process / neurogenesis / synaptic membrane / fatty acid binding / response to cocaine / response to nicotine / mitochondrial membrane / sensory perception of sound / regulation of protein phosphorylation / brain development / response to hydrogen peroxide / response to organic cyclic compound / mitochondrial intermembrane space / fatty acid biosynthetic process / 2 iron, 2 sulfur cluster binding / circadian rhythm / positive regulation of protein catabolic process / NAD binding / FMN binding / nervous system development / 4 iron, 4 sulfur cluster binding / protease binding / response to ethanol / in utero embryonic development / response to oxidative stress / mitochondrial inner membrane / electron transfer activity / response to hypoxia / nuclear body / nuclear speck / mitochondrial matrix / response to xenobiotic stimulus / negative regulation of DNA-templated transcription / neuronal cell body / ubiquitin protein ligase binding / calcium ion binding / dendrite / Neutrophil degranulation / protein-containing complex binding / protein kinase binding / mitochondrion / RNA binding / nucleoplasm Similarity search - Function | |||||||||
Biological species | Homo sapiens (human) | |||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.7 Å | |||||||||
Authors | Gu J / Wu M / Yang M | |||||||||
Citation | Journal: Cell / Year: 2017 Title: Architecture of Human Mitochondrial Respiratory Megacomplex IIIIIV. Authors: Runyu Guo / Shuai Zong / Meng Wu / Jinke Gu / Maojun Yang / Abstract: The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, ...The respiratory megacomplex represents the highest-order assembly of respiratory chain complexes, and it allows mitochondria to respond to energy-requiring conditions. To understand its architecture, we examined the human respiratory chain megacomplex-IIIIIV (MCIIIIIV) with 140 subunits and a subset of associated cofactors using cryo-electron microscopy. The MCIIIIIV forms a circular structure with the dimeric CIII located in the center, where it is surrounded by two copies each of CI and CIV. Two cytochrome c (Cyt.c) molecules are positioned to accept electrons on the surface of the c state CIII dimer. Analyses indicate that CII could insert into the gaps between CI and CIV to form a closed ring, which we termed the electron transport chain supercomplex. The structure not only reveals the precise assignment of individual subunits of human CI and CIII, but also enables future in-depth analysis of the electron transport chain as a whole. | |||||||||
History |
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-Structure visualization
Movie |
Movie viewer |
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Structure viewer | EM map: SurfViewMolmilJmol/JSmol |
Supplemental images |
-Downloads & links
-EMDB archive
Map data | emd_6773.map.gz | 26.2 MB | EMDB map data format | |
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Header (meta data) | emd-6773-v30.xml emd-6773.xml | 14.3 KB 14.3 KB | Display Display | EMDB header |
Images | emd_6773.png | 23.7 KB | ||
Archive directory | http://ftp.pdbj.org/pub/emdb/structures/EMD-6773 ftp://ftp.pdbj.org/pub/emdb/structures/EMD-6773 | HTTPS FTP |
-Validation report
Summary document | emd_6773_validation.pdf.gz | 313.1 KB | Display | EMDB validaton report |
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Full document | emd_6773_full_validation.pdf.gz | 312.6 KB | Display | |
Data in XML | emd_6773_validation.xml.gz | 7.5 KB | Display | |
Arichive directory | https://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6773 ftp://ftp.pdbj.org/pub/emdb/validation_reports/EMD-6773 | HTTPS FTP |
-Related structure data
Related structure data | 5xtdMC 6771C 6772C 6774C 6775C 6776C 5xtbC 5xtcC 5xteC 5xthC 5xtiC M: atomic model generated by this map C: citing same article (ref.) |
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Similar structure data |
-Links
EMDB pages | EMDB (EBI/PDBe) / EMDataResource |
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Related items in Molecule of the Month |
-Map
File | Download / File: emd_6773.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Annotation | This map was obtained by sub-region refinement. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Projections & slices | Image control
Images are generated by Spider. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Voxel size | X=Y=Z: 1.083 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
-Sample components
-Entire : Human respiratory complex I
Entire | Name: Human respiratory complex I |
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Components |
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-Supramolecule #1: Human respiratory complex I
Supramolecule | Name: Human respiratory complex I / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#44 |
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Source (natural) | Organism: Homo sapiens (human) |
Molecular weight | Experimental: 1.0 MDa |
-Experimental details
-Structure determination
Method | cryo EM |
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Processing | single particle reconstruction |
Aggregation state | particle |
-Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
-Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: FEI FALCON II (4k x 4k) / Average electron dose: 1.25 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN |
Electron optics | Illumination mode: OTHER / Imaging mode: BRIGHT FIELD |
Experimental equipment | Model: Titan Krios / Image courtesy: FEI Company |
-Image processing
CTF correction | Software - Name: CTFFIND (ver. 3.0) |
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Final reconstruction | Applied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 3.7 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.4) / Number images used: 167761 |
Initial angle assignment | Type: RANDOM ASSIGNMENT / Software - Name: RELION (ver. 1.4) |
Final angle assignment | Type: RANDOM ASSIGNMENT / Software - Name: RELION (ver. 1.4) |