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- EMDB-18594: Cryo-EM structure of E. coli cytochrome bo3 quinol oxidase assemb... -

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Basic information

Entry
Database: EMDB / ID: EMD-18594
TitleCryo-EM structure of E. coli cytochrome bo3 quinol oxidase assembled in peptidiscs
Map dataMap sharpened by LocSpiral
Sample
  • Complex: Cytochrome bo3 quinol oxidase
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 1
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 2
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 3
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 4
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: 1,2-Distearoyl-sn-glycerophosphoethanolamine
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: HEME O
  • Ligand: COPPER (II) ION
KeywordsE. coli / membrane protein / Ni-NTA resin / cytochrome bo3 quinol oxidase / ubiquinone-8 release / peptidisc / single particle analysis / cryo-EM
Function / homology
Function and homology information


cytochrome o ubiquinol oxidase complex / oxidoreduction-driven active transmembrane transporter activity / ubiquinol oxidase (H+-transporting) / cytochrome bo3 ubiquinol oxidase activity / aerobic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / ubiquinone binding / electron transport coupled proton transport / cytochrome-c oxidase activity / proton transmembrane transporter activity ...cytochrome o ubiquinol oxidase complex / oxidoreduction-driven active transmembrane transporter activity / ubiquinol oxidase (H+-transporting) / cytochrome bo3 ubiquinol oxidase activity / aerobic electron transport chain / oxidoreductase activity, acting on diphenols and related substances as donors, oxygen as acceptor / ubiquinone binding / electron transport coupled proton transport / cytochrome-c oxidase activity / proton transmembrane transporter activity / ATP synthesis coupled electron transport / respirasome / aerobic respiration / respiratory electron transport chain / electron transfer activity / copper ion binding / heme binding / plasma membrane
Similarity search - Function
Cytochrome o ubiquinol oxidase, subunit III / Cytochrome o ubiquinol oxidase subunit IV / Cytochrome o ubiquinol oxidase, subunit I / Ubiquinol oxidase subunit III domain / Cytochrome C oxidase subunit IV, prokaryotes / COX aromatic rich motif / Prokaryotic Cytochrome C oxidase subunit IV / COX Aromatic Rich Motif / Cytochrome o ubiquinol oxidase subunit II / Ubiquinol oxidase subunit 2, cupredoxin domain ...Cytochrome o ubiquinol oxidase, subunit III / Cytochrome o ubiquinol oxidase subunit IV / Cytochrome o ubiquinol oxidase, subunit I / Ubiquinol oxidase subunit III domain / Cytochrome C oxidase subunit IV, prokaryotes / COX aromatic rich motif / Prokaryotic Cytochrome C oxidase subunit IV / COX Aromatic Rich Motif / Cytochrome o ubiquinol oxidase subunit II / Ubiquinol oxidase subunit 2, cupredoxin domain / 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 c oxidase subunit III-like superfamily / Cytochrome C oxidase subunit II, transmembrane domain / Cytochrome oxidase subunit II transmembrane region profile. / Cytochrome c/quinol oxidase subunit II / Cytochrome C oxidase subunit II, transmembrane domain superfamily / Cytochrome c oxidase, subunit I, copper-binding site / Heme-copper oxidase catalytic subunit, copper B binding region signature. / Cytochrome c oxidase-like, subunit I domain / Cytochrome oxidase subunit I profile. / Cytochrome c oxidase subunit I / Cytochrome c oxidase-like, subunit I superfamily / Cytochrome C and Quinol oxidase polypeptide I / Cytochrome C oxidase subunit II, periplasmic domain / Cytochrome c oxidase subunit II-like C-terminal / Cytochrome oxidase subunit II copper A binding domain profile. / Cupredoxin / Prokaryotic membrane lipoprotein lipid attachment site profile.
Similarity search - Domain/homology
Cytochrome bo(3) ubiquinol oxidase subunit 1 / Cytochrome bo(3) ubiquinol oxidase subunit 2 / Cytochrome bo(3) ubiquinol oxidase subunit 3 / Cytochrome bo(3) ubiquinol oxidase subunit 4
Similarity search - Component
Biological speciesEscherichia coli (E. coli) / Escherichia coli BL21(DE3) (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.8 Å
AuthorsGao Y / Zhang Y / Hakke S / Peters PJ / Ravelli RBG
Funding support Netherlands, 3 items
OrganizationGrant numberCountry
Netherlands Organisation for Scientific Research (NWO)731.016.407 Netherlands
Netherlands Organisation for Scientific Research (NWO)184.034.014 Netherlands
Health-HollandLSHM21029 Netherlands
CitationJournal: Biochim Biophys Acta Bioenerg / Year: 2024
Title: Cryo-EM structure of cytochrome bo quinol oxidase assembled in peptidiscs reveals an "open" conformation for potential ubiquinone-8 release.
Authors: Ye Gao / Yue Zhang / Sneha Hakke / Ronny Mohren / Lyanne J P M Sijbers / Peter J Peters / Raimond B G Ravelli /
Abstract: Cytochrome bo quinol oxidase belongs to the heme‑copper-oxidoreductase (HCO) superfamily, which is part of the respiratory chain and essential for cell survival. While the reaction mechanism of cyt ...Cytochrome bo quinol oxidase belongs to the heme‑copper-oxidoreductase (HCO) superfamily, which is part of the respiratory chain and essential for cell survival. While the reaction mechanism of cyt bo has been studied extensively over the last decades, specific details about its substrate binding and product release have remained unelucidated due to the lack of structural information. Here, we report a 2.8 Å cryo-electron microscopy structure of cyt bo from Escherichia coli assembled in peptidiscs. Our structural model shows a conformation for amino acids 1-41 of subunit I different from all previously published structures while the remaining parts of this enzyme are similar. Our new conformation shows a "U-shape" assembly in contrast to the transmembrane helix, named "TM0", in other reported structural models. However, TM0 blocks ubiquinone-8 (reaction product) release, suggesting that other cyt bo conformations should exist. Our structural model presents experimental evidence for an "open" conformation to facilitate substrate/product exchange. This work helps further understand the reaction cycle of this oxidase, which could be a benefit for potential drug/antibiotic design for health science.
History
DepositionOct 5, 2023-
Header (metadata) releaseApr 24, 2024-
Map releaseApr 24, 2024-
UpdateMay 1, 2024-
Current statusMay 1, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_18594.png

Downloads & links

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Map

FileDownload / File: emd_18594.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationMap sharpened by LocSpiral
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 256 pix.
= 213.504 Å		0.83 Å/pix.
x 256 pix.
= 213.504 Å		0.83 Å/pix.
x 256 pix.
= 213.504 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.834 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 4.5
Minimum - Maximum0.0 - 17.376232000000002
Average (Standard dev.)0.2608704 (±0.80367327)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 213.504 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_18594_msk_1.map
Projections & Slices
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Half map: #1

Fileemd_18594_half_map_1.map
Projections & Slices
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Half map: #2

Fileemd_18594_half_map_2.map
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Sample components

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Entire : Cytochrome bo3 quinol oxidase

EntireName: Cytochrome bo3 quinol oxidase
Components
  • Complex: Cytochrome bo3 quinol oxidase
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 1
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 2
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 3
    • Protein or peptide: Cytochrome bo(3) ubiquinol oxidase subunit 4
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
  • Ligand: 1,2-Distearoyl-sn-glycerophosphoethanolamine
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: HEME O
  • Ligand: COPPER (II) ION

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Supramolecule #1: Cytochrome bo3 quinol oxidase

SupramoleculeName: Cytochrome bo3 quinol oxidase / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Details: Heme-copper-oxidoreductase purified from E. coli native membranes by Ni-NTA affinity chromatography.
Source (natural)Organism: Escherichia coli (E. coli) / Strain: C41
Molecular weightTheoretical: 144 KDa

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Macromolecule #1: Cytochrome bo(3) ubiquinol oxidase subunit 1

MacromoleculeName: Cytochrome bo(3) ubiquinol oxidase subunit 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO / EC number: ubiquinol oxidase (H+-transporting)
Source (natural)Organism: Escherichia coli BL21(DE3) (bacteria)
Molecular weightTheoretical: 74.424469 KDa
SequenceString: MFGKLSLDAV PFHEPIVMVT IAGIILGGLA LVGLITYFGK WTYLWKEWLT SVDHKRLGIM YIIVAIVMLL RGFADAIMMR SQQALASAG EAGFLPPHHY DQIFTAHGVI MIFFVAMPFV IGLMNLVVPL QIGARDVAFP FLNNLSFWFT VVGVILVNVS L GVGEFAQT ...String:
MFGKLSLDAV PFHEPIVMVT IAGIILGGLA LVGLITYFGK WTYLWKEWLT SVDHKRLGIM YIIVAIVMLL RGFADAIMMR SQQALASAG EAGFLPPHHY DQIFTAHGVI MIFFVAMPFV IGLMNLVVPL QIGARDVAFP FLNNLSFWFT VVGVILVNVS L GVGEFAQT GWLAYPPLSG IEYSPGVGVD YWIWSLQLSG IGTTLTGINF FVTILKMRAP GMTMFKMPVF TWASLCANVL II ASFPILT VTVALLTLDR YLGTHFFTND MGGNMMMYIN LIWAWGHPEV YILILPVFGV FSEIAATFSR KRLFGYTSLV WAT VCITVL SFIVWLHHFF TMGAGANVNA FFGITTMIIA IPTGVKIFNW LFTMYQGRIV FHSAMLWTIG FIVTFSVGGM TGVL LAVPG ADFVLHNSLF LIAHFHNVII GGVVFGCFAG MTYWWPKAFG FKLNETWGKR AFWFWIIGFF VAFMPLYALG FMGMT RRLS QQIDPQFHTM LMIAASGAVL IALGILCLVI QMYVSIRDRD QNRDLTGDPW GGRTLEWATS SPPPFYNFAV VPHVHE RDA FWEMKEKGEA YKKPDHYEEI HMPKNSGAGI VIAAFSTIFG FAMIWHIWWL AIVGFAGMII TWIVKSFDED VDYYVPV AE IEKLENQHFD EITKAGLKNG N

UniProtKB: Cytochrome bo(3) ubiquinol oxidase subunit 1

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Macromolecule #2: Cytochrome bo(3) ubiquinol oxidase subunit 2

MacromoleculeName: Cytochrome bo(3) ubiquinol oxidase subunit 2 / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli BL21(DE3) (bacteria)
Molecular weightTheoretical: 34.947203 KDa
SequenceString: MRLRKYNKSL GWLSLFAGTV LLSGCNSALL DPKGQIGLEQ RSLILTAFGL MLIVVIPAIL MAVGFAWKYR ASNKDAKYSP NWSHSNKVE AVVWTVPILI IIFLAVLTWK TTHALEPSKP LAHDEKPITI EVVSMDWKWF FIYPEQGIAT VNEIAFPANT P VYFKVTSN ...String:
MRLRKYNKSL GWLSLFAGTV LLSGCNSALL DPKGQIGLEQ RSLILTAFGL MLIVVIPAIL MAVGFAWKYR ASNKDAKYSP NWSHSNKVE AVVWTVPILI IIFLAVLTWK TTHALEPSKP LAHDEKPITI EVVSMDWKWF FIYPEQGIAT VNEIAFPANT P VYFKVTSN SVMNSFFIPR LGSQIYAMAG MQTRLHLIAN EPGTYDGISA SYSGPGFSGM KFKAIATPDR AAFDQWVAKA KQ SPNTMSD MAAFEKLAAP SEYNQVEYFS NVKPDLFADV INKFMAHGKS MDMTQPEGEH SAHEGMEGMD MSHAESAH

UniProtKB: Cytochrome bo(3) ubiquinol oxidase subunit 2

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Macromolecule #3: Cytochrome bo(3) ubiquinol oxidase subunit 3

MacromoleculeName: Cytochrome bo(3) ubiquinol oxidase subunit 3 / type: protein_or_peptide / ID: 3 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli BL21(DE3) (bacteria)
Molecular weightTheoretical: 22.642566 KDa
SequenceString: MATDTLTHAT AHAHEHGHHD AGGTKIFGFW IYLMSDCILF SILFATYAVL VNGTAGGPTG KDIFELPFVL VETFLLLFSS ITYGMAAIA MYKNNKSQVI SWLALTWLFG AGFIGMEIYE FHHLIVNGMG PDRSGFLSAF FALVGTHGLH VTSGLIWMAV L MVQIARRG ...String:
MATDTLTHAT AHAHEHGHHD AGGTKIFGFW IYLMSDCILF SILFATYAVL VNGTAGGPTG KDIFELPFVL VETFLLLFSS ITYGMAAIA MYKNNKSQVI SWLALTWLFG AGFIGMEIYE FHHLIVNGMG PDRSGFLSAF FALVGTHGLH VTSGLIWMAV L MVQIARRG LTSTNRTRIM CLSLFWHFLD VVWICVFTVV YLMGAM

UniProtKB: Cytochrome bo(3) ubiquinol oxidase subunit 3

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Macromolecule #4: Cytochrome bo(3) ubiquinol oxidase subunit 4

MacromoleculeName: Cytochrome bo(3) ubiquinol oxidase subunit 4 / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Escherichia coli BL21(DE3) (bacteria)
Molecular weightTheoretical: 12.037402 KDa
SequenceString:
MSHSTDHSGA SHGSVKTYMT GFILSIILTV IPFWMVMTGA ASPAVILGTI LAMAVVQVLV HLVCFLHMNT KSDEGWNMTA FVFTVLIIA ILVVGSIWIM WNLNYNMMMH

UniProtKB: Cytochrome bo(3) ubiquinol oxidase subunit 4

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Macromolecule #5: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...

MacromoleculeName: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
type: ligand / ID: 5 / Number of copies: 3 / Formula: POV
Molecular weightTheoretical: 760.076 Da
Chemical component information

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM / POPC

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Macromolecule #6: 1,2-Distearoyl-sn-glycerophosphoethanolamine

MacromoleculeName: 1,2-Distearoyl-sn-glycerophosphoethanolamine / type: ligand / ID: 6 / Number of copies: 3 / Formula: 3PE
Molecular weightTheoretical: 748.065 Da
Chemical component information

ChemComp-3PE:
1,2-Distearoyl-sn-glycerophosphoethanolamine / phospholipid*YM / Phosphatidylethanolamine

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Macromolecule #7: PROTOPORPHYRIN IX CONTAINING FE

MacromoleculeName: PROTOPORPHYRIN IX CONTAINING FE / type: ligand / ID: 7 / Number of copies: 1 / Formula: HEM
Molecular weightTheoretical: 616.487 Da
Chemical component information

ChemComp-HEM:
PROTOPORPHYRIN IX CONTAINING FE / Heme B

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Macromolecule #8: HEME O

MacromoleculeName: HEME O / type: ligand / ID: 8 / Number of copies: 1 / Formula: HEO
Molecular weightTheoretical: 838.854 Da
Chemical component information

ChemComp-HEO:
HEME O / Heme O

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Macromolecule #9: COPPER (II) ION

MacromoleculeName: COPPER (II) ION / type: ligand / ID: 9 / Number of copies: 1 / Formula: CU
Molecular weightTheoretical: 63.546 Da
Chemical component information

ChemComp-CU:
COPPER (II) ION / Copper

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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

Concentration1.6 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
20.0 mMC4H11NO3Tris
150.0 mMNaClSodium chlorideSodium Chloride
2.0 %C3H8O3Glycerol

Details: 20mM Tris-HCL, 150mM NaCl, 2% Glycerol, filtered and degassed.
GridModel: UltrAuFoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 40 sec. / Pretreatment - Atmosphere: AIR
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 277.15 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 100.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy / Nominal defocus max: 2.0 µm / Nominal defocus min: 1.5 µm / Nominal magnification: 105000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 8050 / Average exposure time: 2.1 sec. / Average electron dose: 50.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 1277595
Startup modelType of model: INSILICO MODEL
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final 3D classificationNumber classes: 3 / Software - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final reconstructionNumber classes used: 1 / Applied symmetry - Point group: C1 (asymmetric) / Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 2.8 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 45014
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial modelPDB ID:

1fft


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementSpace: REAL / Protocol: FLEXIBLE FIT / Overall B value: 59.97
Output model

PDB-8qqk:
Cryo-EM structure of E. coli cytochrome bo3 quinol oxidase assembled in peptidiscs

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