6JUW

BOVINE HEART CYTOCHROME C OXIDASE IN CATALITIC INTERMEDIATES AT 1.80 ANGSTROM RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.157 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

X-ray structures of catalytic intermediates of cytochromecoxidase provide insights into its O2-activation and unidirectional proton-pump mechanisms.

Shimada, A.Etoh, Y.Kitoh-Fujisawa, R.Sasaki, A.Shinzawa-Itoh, K.Hiromoto, T.Yamashita, E.Muramoto, K.Tsukihara, T.Yoshikawa, S.

(2020) J.Biol.Chem. --: --

  • DOI: 10.1074/jbc.RA119.009596

  • PubMed Abstract: 
  • Cytochrome <i>c </i> oxidase (CcO) reduces O <sub>2 </sub> to water, coupled with a proton-pumping process. The structure of the O <sub>2 </sub>-reduction site of CcO contains two reducing equivalents, Fe <sub> <i>a </i> </sub>3 <sup>2+ </sup> and ...

    Cytochrome c oxidase (CcO) reduces O 2 to water, coupled with a proton-pumping process. The structure of the O 2 -reduction site of CcO contains two reducing equivalents, Fe a 3 2+ and Cu B 1+ , and suggests that a peroxide-bound state (Fe a 3 3+ -O - -O - -Cu B 2+ ) rather than an O 2 -bound state (Fe a 3 2+ -O 2 ) is the initial catalytic intermediate. Unexpectedly, however, resonance Raman spectroscopy results have shown that the initial intermediate is Fe a 3 2+ -O 2 , whereas Fe a 3 3+ -O - -O - -Cu B 2+ is undetectable. Based on X-ray structures of static non-catalytic CcO forms and mutation analyses for bovine CcO, a proton-pumping mechanism has been proposed. It involves a proton-conducting pathway (the H-pathway) comprising a tandem hydrogen-bond network and a water channel located between the N and P side surfaces. However, a system for unidirectional proton-transport has not been experimentally identified. Here, an essentially identical X-ray structure for the two catalytic intermediates (P and F) of bovine CcO was determined at 1.8 Å resolution. A 1.70 Å Fe-O distance of the ferryl center could be best described as Fe a 3 4+ =O 2- , not as Fe a 3 4+ -OH -   The distance suggests a ~800 cm -1 Raman stretching band. We found an interstitial water molecule which could trigger a rapid proton-coupled electron transfer from tyrosine-OH to the slowly forming Fe a 3 3+ -O - -O - -Cu B 2+ state, preventing its detection, consistent with the unexpected Raman results. The H-pathway structures of both intermediates indicated that during proton-pumping from the hydrogen-bond network to the P-side, a transmembrane helix closes the water channel connecting the N-side with the hydrogen-bond network, facilitating unidirectional proton-pumping during the P-to-F transition.


    Organizational Affiliation

    Osaka University.,Department of Life Science, University of Hyogo, Japan.,University of Hyogo, Japan.,Picobiology Institute, Graduate School of Life Science, University of Hyogo, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 1
A, N
514Bos taurusMutation(s): 0 
Gene Names: MT-CO1 (COI, COXI, MTCO1)
EC: 1.9.3.1
Find proteins for P00396 (Bos taurus)
Go to Gene View: MT-CO1
Go to UniProtKB:  P00396
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 2
B, O
227Bos taurusMutation(s): 0 
Gene Names: MT-CO2 (COII, COX2, COXII, MTCO2)
EC: 1.9.3.1
Find proteins for P68530 (Bos taurus)
Go to Gene View: MT-CO2
Go to UniProtKB:  P68530
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 3
C, P
259Bos taurusMutation(s): 0 
Gene Names: MT-CO3 (COIII, COXIII, MTCO3)
EC: 1.9.3.1
Find proteins for P00415 (Bos taurus)
Go to Gene View: MT-CO3
Go to UniProtKB:  P00415
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 4 isoform 1, mitochondrial
D, Q
144Bos taurusMutation(s): 0 
Gene Names: COX4I1 (COX4)
Find proteins for P00423 (Bos taurus)
Go to Gene View: COX4I1
Go to UniProtKB:  P00423
Entity ID: 5
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 5A, mitochondrial
E, R
105Bos taurusMutation(s): 0 
Gene Names: COX5A
Find proteins for P00426 (Bos taurus)
Go to Gene View: COX5A
Go to UniProtKB:  P00426
Entity ID: 6
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 5B
F, S
98Bos taurusMutation(s): 0 
Gene Names: COX5B
Find proteins for P00428 (Bos taurus)
Go to Gene View: COX5B
Go to UniProtKB:  P00428
Entity ID: 7
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 6A2, mitochondrial
G, T
84Bos taurusMutation(s): 0 
Gene Names: COX6A2 (COX6A)
Find proteins for P07471 (Bos taurus)
Go to Gene View: COX6A2
Go to UniProtKB:  P07471
Entity ID: 8
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 6B1
H, U
79Bos taurusMutation(s): 0 
Gene Names: COX6B1 (COX6B)
Find proteins for P00429 (Bos taurus)
Go to Gene View: COX6B1
Go to UniProtKB:  P00429
Entity ID: 9
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 6C
I, V
73Bos taurusMutation(s): 0 
Gene Names: COX6C
Find proteins for P04038 (Bos taurus)
Go to Gene View: COX6C
Go to UniProtKB:  P04038
Entity ID: 10
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 7A1, mitochondrial
J, W
58Bos taurusMutation(s): 0 
Gene Names: COX7A1 (COX7A, COX7AH)
Find proteins for P07470 (Bos taurus)
Go to Gene View: COX7A1
Go to UniProtKB:  P07470
Entity ID: 11
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 7B, mitochondrial
K, X
49Bos taurusMutation(s): 0 
Gene Names: COX7B
Find proteins for P13183 (Bos taurus)
Go to Gene View: COX7B
Go to UniProtKB:  P13183
Entity ID: 12
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 7C, mitochondrial
L, Y
46Bos taurusMutation(s): 0 
Gene Names: COX7C (COX7CP1)
Find proteins for P00430 (Bos taurus)
Go to Gene View: COX7C
Go to UniProtKB:  P00430
Entity ID: 13
MoleculeChainsSequence LengthOrganismDetails
Cytochrome c oxidase subunit 8B, mitochondrial
M, Z
43Bos taurusMutation(s): 0 
Gene Names: COX8B (COX8H)
Find proteins for P10175 (Bos taurus)
Go to UniProtKB:  P10175
Small Molecules
Ligands 15 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEA
Query on HEA

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A, N
HEME-A
C49 H56 Fe N4 O6
ZGGYGTCPXNDTRV-PRYGPKJJSA-L
 Ligand Interaction
PO4
Query on PO4

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H, U
PHOSPHATE ION
O4 P
NBIIXXVUZAFLBC-UHFFFAOYSA-K
 Ligand Interaction
ZN
Query on ZN

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F, S
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
NA
Query on NA

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A, C, N, P
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
PEK
Query on PEK

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C, F, P, T
(1S)-2-{[(2-AMINOETHOXY)(HYDROXY)PHOSPHORYL]OXY}-1-[(STEAROYLOXY)METHYL]ETHYL (5E,8E,11E,14E)-ICOSA-5,8,11,14-TETRAENOATE
PHOSPHATIDYLETHANOLAMINE, 2-ARACHIDONOYL-1-STEAROYL-SN-GLYCEROL-3-PHOSPHOETHANOLAMINE
C43 H78 N O8 P
ANRKEHNWXKCXDB-BHFWLYLHSA-N
 Ligand Interaction
CDL
Query on CDL

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C, G, P, T
CARDIOLIPIN
DIPHOSPHATIDYL GLYCEROL; BIS-(1,2-DIACYL-SN-GLYCERO-3-PHOSPHO)-1',3'-SN-GLYCEROL
C81 H156 O17 P2
XVTUQDWPJJBEHJ-KZCWQMDCSA-L
 Ligand Interaction
DMU
Query on DMU

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A, B, C, D, J, K, L, M, O, P, Q, W, X, Y, Z
DECYL-BETA-D-MALTOPYRANOSIDE
DECYLMALTOSIDE
C22 H42 O11
WOQQAWHSKSSAGF-WXFJLFHKSA-N
 Ligand Interaction
CUA
Query on CUA

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B, O
DINUCLEAR COPPER ION
Cu2
ALKZAGKDWUSJED-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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A, B, C, D, E, F, G, H, J, L, M, N, O, P, Q, S, T, U, W, Y
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
CHD
Query on CHD

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C, G, J, L, P, T, Y
CHOLIC ACID
C24 H40 O5
BHQCQFFYRZLCQQ-OELDTZBJSA-N
 Ligand Interaction
PSC
Query on PSC

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A, 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
PHOSPHATIDYLCHOLINE, 2-LINOLEOYL-1-PALMITOYL-SN-GYCEROL-3-PHOSPHOCHOLINE
C42 H81 N O8 P
JLPULHDHAOZNQI-AUSZDXHESA-O
 Ligand Interaction
MG
Query on MG

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A, N
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
CU
Query on CU

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A, N
COPPER (II) ION
Cu
JPVYNHNXODAKFH-UHFFFAOYSA-N
 Ligand Interaction
TGL
Query on TGL

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A, D, L, N, Q, Y
TRISTEAROYLGLYCEROL
TRIACYLGLYCEROL
C57 H110 O6
DCXXMTOCNZCJGO-UHFFFAOYSA-N
 Ligand Interaction
PGV
Query on PGV

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A, C, N, P, T
(1R)-2-{[{[(2S)-2,3-DIHYDROXYPROPYL]OXY}(HYDROXY)PHOSPHORYL]OXY}-1-[(PALMITOYLOXY)METHYL]ETHYL (11E)-OCTADEC-11-ENOATE
PHOSPHATIDYLGLYCEROL, 2-VACCENOYL-1-PALMITOYL-SN-GLYCEROL-3-PHOSPHOGLYCEROL
C40 H77 O10 P
ADYWCMPUNIVOEA-GPJPVTGXSA-N
 Ligand Interaction
Modified Residues  3 Unique
IDChainsTypeFormula2D DiagramParent
FME
Query on FME
A, B, N, O
L-PEPTIDE LINKINGC6 H11 N O3 SMET
SAC
Query on SAC
I, V
L-PEPTIDE LINKINGC5 H9 N O4SER
TPO
Query on TPO
G, T
L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.157 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 182.217α = 90.00
b = 204.650β = 90.00
c = 177.397γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
DMphasing
PHENIXrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2020-03-25
    Type: Initial release