5XTE

Cryo-EM structure of human respiratory complex III (cytochrome bc1 complex)

  • Classification: OXIDOREDUCTASE/ELECTRON TRANSPORT
  • Organism(s): Homo sapiens

  • Deposited: 2017-06-19 Released: 2017-08-30 
  • Deposition Author(s): Gu, J., Wu, M., Yang, M.
  • Funding Organization(s): National Natural Science Foundation of China; Ministry of Science and Technology; National Science Fund for Distinguished Young Scholars 

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Architecture of Human Mitochondrial Respiratory Megacomplex I2III2IV2.

Guo, R.Zong, S.Wu, M.Gu, J.Yang, M.

(2017) Cell 170: 1247-1257.e12

  • DOI: 10.1016/j.cell.2017.07.050
  • Primary Citation of Related Structures:  

  • PubMed 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, we examined the human respiratory chain megacomple ...

    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-I2III2IV2 (MCI2III2IV2) with 140 subunits and a subset of associated cofactors using cryo-electron microscopy. The MCI2III2IV2 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 c1 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.


    Organizational Affiliation

    Ministry of Education Key Laboratory of Protein Science, Tsinghua-Peking Joint Center for Life Sciences, Beijing Advanced Innovation Center for Structural Biology, School of Life Sciences, Tsinghua University, 100084 Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 8
A, N
81Homo sapiensMutation(s): 0 
Gene Names: UQCRQ
Find proteins for O14949 (Homo sapiens)
Go to Gene View: UQCRQ
Go to UniProtKB:  O14949
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit Rieske, mitochondrial
B, O
57Homo sapiensMutation(s): 0 
Gene Names: UQCRFS1
EC: 7.1.1.8
Find proteins for P47985 (Homo sapiens)
Go to Gene View: UQCRFS1
Go to UniProtKB:  P47985
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit Rieske, mitochondrial
C, P
196Homo sapiensMutation(s): 0 
Gene Names: UQCRFS1
EC: 7.1.1.8
Find proteins for P47985 (Homo sapiens)
Go to Gene View: UQCRFS1
Go to UniProtKB:  P47985
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 9
D, Q
62Homo sapiensMutation(s): 0 
Gene Names: UQCR10 (UCRC)
Find proteins for Q9UDW1 (Homo sapiens)
Go to Gene View: UQCR10
Go to UniProtKB:  Q9UDW1
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 6, mitochondrial
E, R
75Homo sapiensMutation(s): 0 
Gene Names: UQCRH
Find proteins for P07919 (Homo sapiens)
Go to Gene View: UQCRH
Go to UniProtKB:  P07919
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 7
F, S
106Homo sapiensMutation(s): 0 
Gene Names: UQCRB (UQBP)
Find proteins for P14927 (Homo sapiens)
Go to Gene View: UQCRB
Go to UniProtKB:  P14927
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 10
G, T
51Homo sapiensMutation(s): 0 
Gene Names: UQCR11 (UQCR)
Find proteins for O14957 (Homo sapiens)
Go to Gene View: UQCR11
Go to UniProtKB:  O14957
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c1, heme protein, mitochondrial
H, U
241Homo sapiensMutation(s): 0 
Gene Names: CYC1
Find proteins for P08574 (Homo sapiens)
Go to Gene View: CYC1
Go to UniProtKB:  P08574
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b
J, V
378Homo sapiensMutation(s): 0 
Gene Names: MT-CYB (COB, CYTB, MTCYB)
Find proteins for P00156 (Homo sapiens)
Go to Gene View: MT-CYB
Go to UniProtKB:  P00156
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 2, mitochondrial
K, W
419Homo sapiensMutation(s): 0 
Gene Names: UQCRC2
Find proteins for P22695 (Homo sapiens)
Go to Gene View: UQCRC2
Go to UniProtKB:  P22695
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
Cytochrome b-c1 complex subunit 1, mitochondrial
L, Y
446Homo sapiensMutation(s): 0 
Gene Names: UQCRC1
Find proteins for P31930 (Homo sapiens)
Go to Gene View: UQCRC1
Go to UniProtKB:  P31930
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CDL
Query on CDL

Download SDF File 
Download CCD File 
A, G, H, J, L, N, U, Y
CARDIOLIPIN
DIPHOSPHATIDYL GLYCEROL; BIS-(1,2-DIACYL-SN-GLYCERO-3-PHOSPHO)-1',3'-SN-GLYCEROL
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L
 Ligand Interaction
FES
Query on FES

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Download CCD File 
C, P
FE2/S2 (INORGANIC) CLUSTER
Fe2 S2
NIXDOXVAJZFRNF-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
J, V
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
HEC
Query on HEC

Download SDF File 
Download CCD File 
H, U
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
PLX
Query on PLX

Download SDF File 
Download CCD File 
L, Q, T
(9R,11S)-9-({[(1S)-1-HYDROXYHEXADECYL]OXY}METHYL)-2,2-DIMETHYL-5,7,10-TRIOXA-2LAMBDA~5~-AZA-6LAMBDA~5~-PHOSPHAOCTACOSANE-6,6,11-TRIOL
C42 H89 N O8 P
YVNJQRQLQPWVSQ-IWSHAHEXSA-O
 Ligand Interaction
PEE
Query on PEE

Download SDF File 
Download CCD File 
H, J, L, U, V, Y
1,2-Dioleoyl-sn-glycero-3-phosphoethanolamine
DOPE
C41 H83 N O8 P
LVNGJLRDBYCPGB-LDLOPFEMSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.4 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-06-19 
  • Released Date: 2017-08-30 
  • Deposition Author(s): Gu, J., Wu, M., Yang, M.

Funding OrganizationLocationGrant Number
National Natural Science Foundation of ChinaChina21532004
National Natural Science Foundation of ChinaChina31570733
Ministry of Science and TechnologyChina2016YFA0501100
Ministry of Science and TechnologyChina2017YFA0504600
National Science Fund for Distinguished Young ScholarsChina31625008

Revision History 

  • Version 1.0: 2017-08-30
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Database references
  • Version 1.2: 2017-12-06
    Type: Data processing, Database references