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- EMDB-6776: Cryo-EM architecture of human respiratory chain megacomplex-I2III2IV2 -

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Basic information

Entry
Database: EMDB / ID: EMD-6776
TitleCryo-EM architecture of human respiratory chain megacomplex-I2III2IV2
Map data
Sample
  • Complex: Human respiratory chain megacomplex-I2III2IV2
Function / homology
Function and homology information


Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / response to D-galactosamine / Complex III assembly / response to cobalamin / Complex III assembly / Complex III assembly ...Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / Complex III assembly / response to D-galactosamine / Complex III assembly / response to cobalamin / Complex III assembly / Complex III assembly / Complex III assembly / Complex IV assembly / TP53 Regulates Metabolic Genes / Mitochondrial Fatty Acid Beta-Oxidation / Protein lipoylation / Complex I biogenesis / respiratory chain complex IV assembly / response to mercury ion / Cytoprotection by HMOX1 / subthalamus development / pons development / Respiratory electron transport / protein insertion into mitochondrial inner membrane / mitochondrial respirasome assembly / cerebellar Purkinje cell layer development / : / mitochondrial respiratory chain complex III assembly / mitochondrial processing peptidase complex / thalamus development / Respiratory electron transport / pyramidal neuron development / respiratory chain complex IV / 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 / Mitochondrial ribosome-associated quality control / Mitochondrial protein import / Mitochondrial translation termination / neural precursor cell proliferation / mitochondrial [2Fe-2S] assembly complex / mitochondrial large ribosomal subunit binding / ubiquinone biosynthetic process / respiratory chain complex / gliogenesis / Mitochondrial translation termination / cytochrome-c oxidase / respiratory chain complex III / negative regulation of non-canonical NF-kappaB signal transduction / cellular respiration / cardiac muscle tissue development / quinol-cytochrome-c reductase / mitochondrial electron transport, cytochrome c to oxygen / oxidative phosphorylation / oxidoreductase activity, acting on NAD(P)H, quinone or similar compound as acceptor / positive regulation of mitochondrial membrane potential / [2Fe-2S] cluster assembly / quinol-cytochrome-c reductase activity / oxygen sensor activity / midbrain development / azurophil granule membrane / cytochrome-c oxidase activity / mitochondrial electron transport, ubiquinol to cytochrome c / iron-sulfur cluster assembly / response to copper ion / sodium ion transport / hypothalamus development / Mitochondrial protein degradation / 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 / mitochondrial respiratory chain complex I assembly / RHOG GTPase cycle / response to hyperoxia / response to cadmium ion / oxidoreductase activity, acting on NAD(P)H / NADH dehydrogenase activity / reactive oxygen species metabolic process / cerebellum development / respiratory chain complex I / positive regulation of execution phase of apoptosis / response to cAMP / NADH dehydrogenase (ubiquinone) activity / acyl carrier activity / cellular response to interferon-beta / neurogenesis / quinone binding / endopeptidase activator activity / cellular response to retinoic acid / ATP synthesis coupled electron transport / negative regulation of reactive oxygen species biosynthetic process
Similarity search - Function
Cytochrome b-c1 complex subunit 10 / Single alpha-helix domain superfamily / Ubiquinol-cytochrome C reductase complex, 6.4kD protein / Cytochrome c oxidase, subunit 8 / Mitochondrial cytochrome c oxidase subunit VIc/VIIs / Cytochrome c oxidase, subunit 8 superfamily / Mitochondrial cytochrome c oxidase subunit VIc/VIIs superfamily / : / Cytochrome oxidase c subunit VIII / Cytochrome c oxidase subunit VIc ...Cytochrome b-c1 complex subunit 10 / Single alpha-helix domain superfamily / Ubiquinol-cytochrome C reductase complex, 6.4kD protein / Cytochrome c oxidase, subunit 8 / Mitochondrial cytochrome c oxidase subunit VIc/VIIs / Cytochrome c oxidase, subunit 8 superfamily / Mitochondrial cytochrome c oxidase subunit VIc/VIIs superfamily / : / Cytochrome oxidase c subunit VIII / Cytochrome c oxidase subunit VIc / Cytochrome c oxidase subunit VIIa, metazoa / Cytochrome C oxidase, subunit VIIB / Cytochrome c oxidase subunit IV / Cytochrome C oxidase, subunit VIIB domain superfamily / Cytochrome c oxidase, subunit VIIa superfamily / Cytochrome C oxidase chain VIIB / Cytochrome c oxidase, subunit VIa, conserved site / Cytochrome c oxidase subunit VIa signature. / Cytochrome c oxidase, subunit VIa / Cytochrome c oxidase, subunit VIa superfamily / Cytochrome c oxidase subunit VIa / Ubiquinol-cytochrome c reductase 8kDa, N-terminal / Ubiquinol-cytochrome c reductase 8 kDa, N-terminal / Cytochrome c oxidase, subunit VIb / : / Cytochrome c oxidase subunit Vb, zinc binding region signature. / Cytochrome c oxidase subunit VIIc / Cytochrome c oxidase subunit IV family / Cytochrome c oxidase, subunit VIb superfamily / Cytochrome c oxidase subunit VIIc superfamily / Cytochrome c oxidase subunit IV superfamily / Cytochrome c oxidase subunit VIIc / Cytochrome c oxidase subunit IV / Cytochrome c oxidase subunit 2, C-terminal / Cytochrome oxidase c subunit VIb / Cytochrome c oxidase, subunit Va/VI / Cytochrome c oxidase, subunit Va/VI superfamily / Cytochrome c oxidase subunit Va / Cytochrome c oxidase subunit VII / Cytochrome c oxidase subunit VII / Globular protein, non-globular alpha/beta subunit / Cytochrome c oxidase, subunit Vb / Cytochrome c oxidase subunit Vb / Cytochrome c oxidase subunit Vb, zinc binding domain profile. / Complex1_LYR-like / Cytochrome c oxidase, subunit Vb superfamily / Cytochrome c oxidase subunit III domain / Cytochrome c oxidase, subunit II / Cytochrome b-c1 complex, subunit 6 / Cytochrome c oxidase subunit I domain / Cytochrome C oxidase subunit II, transmembrane domain / Cytochrome b-c1 complex subunit 8 / UcrQ family / Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily / Cytochrome C oxidase subunit II, transmembrane domain / Cytochrome oxidase subunit II transmembrane region profile. / Cytochrome b-c1 complex subunit 7 / Cytochrome b-c1 complex subunit 7 superfamily / Ubiquinol-cytochrome C reductase complex 14kD subunit / Cytochrome b-c1 complex subunit 8 superfamily / Cytochrome b-c1 complex subunit Rieske, transmembrane domain / Ubiquinol cytochrome reductase transmembrane region / Cytochrome c oxidase subunit III / Cytochrome c oxidase subunit III-like / Cytochrome c oxidase, subunit III, 4-helical bundle / Cytochrome c oxidase subunit III / Heme-copper oxidase subunit III family profile. / Cytochrome b-c1 complex subunit 9 / Cytochrome b-c1 complex subunit 9 superfamily / Cytochrome b-c1 complex subunit 9 / Cytochrome c oxidase subunit III-like superfamily / Ubiquinol-cytochrome C reductase hinge domain / Ubiquinol-cytochrome C reductase hinge domain superfamily / Ubiquinol-cytochrome C reductase hinge protein / Cytochrome c1, transmembrane anchor, C-terminal / : / Cytochrome c/quinol oxidase subunit II / Cytochrome b / Copper centre Cu(A) / CO II and nitrous oxide reductase dinuclear copper centers signature. / Ubiquinol-cytochrome c reductase, iron-sulphur subunit / Cytochrome C oxidase subunit II, transmembrane domain superfamily / : / Cytochrome c1 / Cytochrome C1 family / NADH:ubiquinone oxidoreductase, ESSS subunit / NADH-ubiquinone oxidoreductase 1 subunit C1 / ESSS subunit of NADH:ubiquinone oxidoreductase (complex I) / NADH dehydrogenase [ubiquinone] 1 subunit C1, mitochondrial / Peptidase M16, zinc-binding site / Insulinase family, zinc-binding region signature. / : / Cytochrome c oxidase, subunit I, copper-binding site / Heme-copper oxidase catalytic subunit, copper B binding region signature. / Cytochrome b/b6, C-terminal / Cytochrome c oxidase-like, subunit I domain / Cytochrome b(C-terminal)/b6/petD / Cytochrome oxidase subunit I profile. / Cytochrome b/b6 C-terminal region profile. / Cytochrome b/b6, C-terminal domain superfamily
Similarity search - Domain/homology
NADH-ubiquinone oxidoreductase chain 4 / NADH-ubiquinone oxidoreductase chain 3 / NADH-ubiquinone oxidoreductase chain 1 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial / Acyl carrier protein, mitochondrial / Cytochrome b-c1 complex subunit 8 / Cytochrome b-c1 complex subunit 10 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 1 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 5, mitochondrial ...NADH-ubiquinone oxidoreductase chain 4 / NADH-ubiquinone oxidoreductase chain 3 / NADH-ubiquinone oxidoreductase chain 1 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 8, mitochondrial / Acyl carrier protein, mitochondrial / Cytochrome b-c1 complex subunit 8 / Cytochrome b-c1 complex subunit 10 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 1 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 4, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 5, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 3 / NADH dehydrogenase [ubiquinone] 1 subunit C1, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 2 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 5 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 7, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 2, mitochondrial / NADH dehydrogenase [ubiquinone] iron-sulfur protein 6, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 1 / NADH dehydrogenase [ubiquinone] iron-sulfur protein 3, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 6 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 3 / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 4 / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 8, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 2, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 7 / NADH dehydrogenase [ubiquinone] 1 subunit C2 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 10, mitochondrial / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 10 / Cytochrome b / Cytochrome c oxidase subunit 1 / Cytochrome c oxidase subunit 3 / Cytochrome c oxidase subunit 4 isoform 1, mitochondrial / Cytochrome c oxidase subunit 5A, mitochondrial / Cytochrome c oxidase subunit 5B, mitochondrial / Cytochrome c oxidase subunit 6B1 / Cytochrome c oxidase subunit 7C, mitochondrial / NADH-ubiquinone oxidoreductase chain 2 / NADH-ubiquinone oxidoreductase chain 4 / NADH-ubiquinone oxidoreductase chain 5 / Cytochrome c oxidase subunit 6C / Cytochrome c oxidase subunit 7A1, mitochondrial / Cytochrome c oxidase subunit 6A2, mitochondrial / Cytochrome b-c1 complex subunit 6, mitochondrial / Cytochrome c1, heme protein, mitochondrial / Cytochrome c oxidase subunit 8B, mitochondrial / Cytochrome c oxidase subunit 7B, mitochondrial / Cytochrome b-c1 complex subunit 7 / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 7 / NADH dehydrogenase [ubiquinone] flavoprotein 2, mitochondrial / Cytochrome b-c1 complex subunit 2, mitochondrial / NADH-ubiquinone oxidoreductase 75 kDa subunit, mitochondrial / Cytochrome b-c1 complex subunit 1, mitochondrial / Cytochrome b-c1 complex subunit Rieske, mitochondrial / NADH dehydrogenase [ubiquinone] flavoprotein 1, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 8 / NADH dehydrogenase [ubiquinone] flavoprotein 3, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 6 / Cytochrome c oxidase subunit 2 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 5 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 9, mitochondrial / NADH-ubiquinone oxidoreductase chain 2 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 11 / NADH-ubiquinone oxidoreductase chain 6 / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 11, mitochondrial / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 13 / Cytochrome b-c1 complex subunit 9 / NADH dehydrogenase [ubiquinone] 1 alpha subcomplex subunit 12 / NADH dehydrogenase [ubiquinone] 1 beta subcomplex subunit 9 / NADH-ubiquinone oxidoreductase chain 4L / NADH-ubiquinone oxidoreductase chain 5
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 17.4 Å
AuthorsGu J / Wu M / Yang M
CitationJournal: 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
DepositionJun 18, 2017-
Header (metadata) releaseSep 13, 2017-
Map releaseSep 13, 2017-
UpdateDec 13, 2017-
Current statusDec 13, 2017Processing site: PDBj / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.0056
  • Imaged by UCSF Chimera
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  • Surface view colored by height
  • Surface level: 0.0056
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-5xti
  • Surface level: 0.0056
  • Imaged by UCSF Chimera
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Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_6776.png

Downloads & links

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Map

FileDownload / File: emd_6776.map.gz / Format: CCP4 / Size: 421.9 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 480 pix.
= 519.84 Å		1.08 Å/pix.
x 480 pix.
= 519.84 Å		1.08 Å/pix.
x 480 pix.
= 519.84 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.083 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0056 / Movie #1: 0.0056
Minimum - Maximum-0.029248776 - 0.054389697
Average (Standard dev.)0.00030900445 (±0.005835759)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions480480480
Spacing480480480
CellA=B=C: 519.83997 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0831.0831.083
M x/y/z480480480
origin x/y/z0.0000.0000.000
length x/y/z519.840519.840519.840
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS480480480
D min/max/mean-0.0290.0540.000

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Supplemental data

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Sample components

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Entire : Human respiratory chain megacomplex-I2III2IV2

EntireName: Human respiratory chain megacomplex-I2III2IV2
Components
  • Complex: Human respiratory chain megacomplex-I2III2IV2

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Supramolecule #1: Human respiratory chain megacomplex-I2III2IV2

SupramoleculeName: Human respiratory chain megacomplex-I2III2IV2 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#70
Source (natural)Organism: Homo sapiens (human)
Molecular weightExperimental: 2.9 MDa

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON II (4k x 4k) / Average electron dose: 1.25 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: OTHER / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: CTFFIND (ver. 3.0)
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 17.4 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 1.4) / Number images used: 8600
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: RELION (ver. 1.4)
Final angle assignmentType: RANDOM ASSIGNMENT / Software - Name: RELION (ver. 1.4)

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