5IY5

Electron transfer complex of cytochrome c and cytochrome c oxidase at 2.0 angstrom resolution

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 2.0 of the entry. See complete history. 


Literature

Complex structure of cytochrome c-cytochrome c oxidase reveals a novel protein-protein interaction mode

Shimada, S., Shinzawa-Itoh, K., Baba, J., Aoe, S., Shimada, A., Yamashita, E., Kang, J., Tateno, M., Yoshikawa, S., Tsukihara, T.

(2017) EMBO J 36: 291-300

  • DOI: 10.15252/embj.201695021
  • Primary Citation of Related Structures:  
    5IY5

  • PubMed Abstract: 

    • Mitochondrial cytochrome c oxidase (CcO) transfers electrons from cytochrome c (Cyt.c) to O 2 to generate H 2 O, a process coupled to proton pumping. To elucidate the mechanism of electron transfer, we determined the structure of the mammalian Cyt ...

    Mitochondrial cytochrome c oxidase (CcO) transfers electrons from cytochrome c (Cyt.c) to O 2 to generate H 2 O, a process coupled to proton pumping. To elucidate the mechanism of electron transfer, we determined the structure of the mammalian Cyt.c-CcO complex at 2.0-Å resolution and identified an electron transfer pathway from Cyt.c to CcO. The specific interaction between Cyt.c and CcO is stabilized by a few electrostatic interactions between side chains within a small contact surface area. Between the two proteins are three water layers with a long inter-molecular span, one of which lies between the other two layers without significant direct interaction with either protein. Cyt.c undergoes large structural fluctuations, using the interacting regions with CcO as a fulcrum. These features of the protein-protein interaction at the docking interface represent the first known example of a new class of protein-protein interaction, which we term "soft and specific". This interaction is likely to contribute to the rapid association/dissociation of the Cyt.c-CcO complex, which facilitates the sequential supply of four electrons for the O 2 reduction reaction.

    Organizational Affiliation: 

    JST, CREST, Kawaguchi, Saitama, Japan.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 1 A, N514Bos taurusMutation(s): 0 
Gene Names: MT-CO1, COI, COXI, MTCO1
EC: 1.9.3.1 (PDB Primary Data), 7.1.1.9 (UniProt)
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
Find proteins for P00396 (Bos taurus)
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 2 B, O227Bos taurusMutation(s): 0 
Gene Names: MT-CO2, COII, COX2, COXII, MTCO2
EC: 7.1.1.9
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 3 C, P259Bos taurusMutation(s): 0 
Gene Names: MT-CO3, COIII, COXIII, MTCO3
EC: 7.1.1.9
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 4 isoform 1, mitochondrial D, Q144Bos taurusMutation(s): 0 
Gene Names: COX4I1, COX4
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 5A, mitochondrial E, R105Bos taurusMutation(s): 0 
Gene Names: COX5A
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 6
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 5B, mitochondrial F, S98Bos taurusMutation(s): 0 
Gene Names: COX5B
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 7
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 6A2, mitochondrial G, T84Bos taurusMutation(s): 0 
Gene Names: COX6A2, COX6A
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 8
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 6B1 H, U79Bos taurusMutation(s): 0 
Gene Names: COX6B1, COX6B
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 9
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 6C I, V73Bos taurusMutation(s): 0 
Gene Names: COX6C
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 10
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 7A1, mitochondrial J, W58Bos taurusMutation(s): 0 
Gene Names: COX7A1, COX7A, COX7AH
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 11
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 7B, mitochondrial K, X49Bos taurusMutation(s): 0 
Gene Names: COX7B
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 12
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 7C, mitochondrial L, Y46Bos taurusMutation(s): 0 
Gene Names: COX7C, COX7CP1
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 13
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c oxidase subunit 8B, mitochondrial M, Z43Bos taurusMutation(s): 0 
Gene Names: COX8B, COX8H
Membrane protein
Mpstruc		Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL		Sub Group: 
Electron Transport Chain Complexes: Complex IV (Cytochrome C Oxidase)		Protein: 
Cytochrome C Oxidase in complex with cytochrome c
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Entity ID: 14
MoleculeChainsSequence LengthOrganismDetailsImage
Cytochrome c 1, 2105Equus caballusMutation(s): 1 
Gene Names: CYCS, CYC
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  • Reference Sequence
Small Molecules
Ligands 17 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CDL
Query on CDL
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C, G, P, T
CARDIOLIPIN
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L		 Ligand Interaction
TGL
Query on TGL
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B, D, L, N, Q
TRISTEAROYLGLYCEROL
C57 H110 O6
DCXXMTOCNZCJGO-UHFFFAOYSA-N		 Ligand Interaction
HEA
Query on HEA
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A, N
HEME-A
C49 H56 Fe N4 O6
ZGGYGTCPXNDTRV-PRYGPKJJSA-L		 Ligand Interaction
PEK
Query on PEK
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C, P
(1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(STEAROYLOXY)METHYL]ETHYL (5E,8E,11E,14E)-ICOSA-5,8,11,14-TETRAENOATE
C43 H78 N O8 P
ANRKEHNWXKCXDB-BHFWLYLHSA-N		 Ligand Interaction
PSC
Query on PSC
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E, V
(7R,17E,20E)-4-HYDROXY-N,N,N-TRIMETHYL-9-OXO-7-[(PALMITOYLOXY)METHYL]-3,5,8-TRIOXA-4-PHOSPHAHEXACOSA-17,20-DIEN-1-AMINIUM 4-OXIDE
C42 H81 N O8 P
JLPULHDHAOZNQI-AUSZDXHESA-O		 Ligand Interaction
PGV
Query on PGV
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A, C, N, P
(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
C40 H77 O10 P
ADYWCMPUNIVOEA-GPJPVTGXSA-N		 Ligand Interaction
HEC
Query on HEC
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1, 2
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N		 Ligand Interaction
DMU
Query on DMU
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M, Z
DECYL-BETA-D-MALTOPYRANOSIDE
C22 H42 O11
WOQQAWHSKSSAGF-WXFJLFHKSA-N		 Ligand Interaction
CHD
Query on CHD
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C, G, J, P, T, W
CHOLIC ACID
C24 H40 O5
BHQCQFFYRZLCQQ-OELDTZBJSA-N		 Ligand Interaction
CUA
Query on CUA
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B, O
DINUCLEAR COPPER ION
Cu2
ALKZAGKDWUSJED-UHFFFAOYSA-N		 Ligand Interaction
ZN
Query on ZN
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F, S
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N		 Ligand Interaction
CU
Query on CU
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A, N
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
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B, C, E, F, G, I, N, S
1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
PER
Query on PER
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A, N
PEROXIDE ION
O2
ANAIPYUSIMHBEL-UHFFFAOYSA-N		 Ligand Interaction
MG
Query on MG
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A, N
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
NA
Query on NA
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A, C, N, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
UNL
Query on UNL
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C, J, L, N, P, T, W, Y
Unknown ligand
FKNQFGJONOIPTF-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
FME
Query on FME		A,NL-PEPTIDE LINKINGC6 H11 N O3 SMET
TPO
Query on TPO		G,TL-PEPTIDE LINKINGC4 H10 N O6 PTHR
SAC
Query on SAC		I,VL-PEPTIDE LINKINGC5 H9 N O4SER
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.167 
  • R-Value Observed: 0.169 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 113.29α = 90
b = 183.872β = 102.12
c = 148.929γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
MOLREPphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Japan--

Revision History  (Full details and data files)

  • Version 1.0: 2017-01-11
    Type: Initial release
  • Version 1.1: 2017-02-15
    Changes: Database references
  • Version 2.0: 2019-10-09
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary