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- EMDB-52451: Structure of the Cytochrome o ubiquinol oxidase embedded in the n... -

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Basic information

Entry
Database: EMDB / ID: EMD-52451
TitleStructure of the Cytochrome o ubiquinol oxidase embedded in the nanodisc
Map dataUnsharpened map
Sample
  • Complex: Trimeric complex of ACRB transporter co-purified from E.coli in nanodisc
    • 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: HEME O
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: COPPER (II) ION
  • Ligand: ZINC ION
Keywordsoxidase / ELECTRON TRANSPORT
Function / homology
Function and homology information


cytochrome o ubiquinol oxidase complex / 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 / cytochrome-c oxidase activity / proton transmembrane transporter activity / electron transport coupled proton transport / ATP synthesis coupled electron transport / aerobic respiration ...cytochrome o ubiquinol oxidase complex / 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 / cytochrome-c oxidase activity / proton transmembrane transporter activity / electron transport coupled proton transport / ATP synthesis coupled electron transport / aerobic respiration / respiratory electron transport chain / copper ion binding / heme binding / metal ion 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 ...: / 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 II, transmembrane domain / Cytochrome oxidase subunit II transmembrane region profile. / 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/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)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.72 Å
AuthorsMim C / Zhang Q / Murthy AV
Funding support Sweden, 1 items
OrganizationGrant numberCountry
Carl Trygger FoundationCTS 21:1630 Sweden
CitationJournal: To Be Published
Title: In silico classification and identification co-purified protein complexes yield new structures and multiple MSP assembly states
Authors: Zhang Q / Murthy AV / Mim C
History
DepositionJan 5, 2025-
Header (metadata) releaseJan 14, 2026-
Map releaseJan 14, 2026-
UpdateJan 14, 2026-
Current statusJan 14, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_52451.png

Downloads & links

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Map

FileDownload / File: emd_52451.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationUnsharpened map
Voxel sizeX=Y=Z: 0.66 Å
Density
Contour LevelBy AUTHOR: 0.02168
Minimum - Maximum-0.06260756 - 0.16117625
Average (Standard dev.)-0.00018079793 (±0.004674709)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 237.6 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_52451_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Additional map: Map sharpened with DeepEMhancer

Fileemd_52451_additional_1.map
AnnotationMap sharpened with DeepEMhancer
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_52451_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_52451_half_map_2.map
Projections & Slices
AxesZYX

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Histogram (log scale)

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Sample components

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Entire : Trimeric complex of ACRB transporter co-purified from E.coli in n...

EntireName: Trimeric complex of ACRB transporter co-purified from E.coli in nanodisc
Components
  • Complex: Trimeric complex of ACRB transporter co-purified from E.coli in nanodisc
    • 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: HEME O
  • Ligand: PROTOPORPHYRIN IX CONTAINING FE
  • Ligand: COPPER (II) ION
  • Ligand: ZINC ION

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Supramolecule #1: Trimeric complex of ACRB transporter co-purified from E.coli in n...

SupramoleculeName: Trimeric complex of ACRB transporter co-purified from E.coli in nanodisc
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Source (natural)Organism: Escherichia coli (E. coli)

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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 (E. coli)
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 (E. coli)
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 (E. coli)
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 (E. coli)
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: HEME O

MacromoleculeName: HEME O / type: ligand / ID: 5 / Number of copies: 1 / Formula: HEO
Molecular weightTheoretical: 838.854 Da
Chemical component information

ChemComp-HEO:
HEME O

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Macromolecule #6: PROTOPORPHYRIN IX CONTAINING FE

MacromoleculeName: PROTOPORPHYRIN IX CONTAINING FE / type: ligand / ID: 6 / Number of copies: 1 / Formula: HEM
Molecular weightTheoretical: 616.487 Da
Chemical component information

ChemComp-HEM:
PROTOPORPHYRIN IX CONTAINING FE

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Macromolecule #7: COPPER (II) ION

MacromoleculeName: COPPER (II) ION / type: ligand / ID: 7 / Number of copies: 1 / Formula: CU
Molecular weightTheoretical: 63.546 Da
Chemical component information

ChemComp-CU:
COPPER (II) ION

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Macromolecule #8: ZINC ION

MacromoleculeName: ZINC ION / type: ligand / ID: 8 / Number of copies: 1 / Formula: ZN
Molecular weightTheoretical: 65.409 Da

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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

Concentration4.6 mg/mL
BufferpH: 7.5 / Details: 50mM HEPES, 150mM NaCl and 5mM EGTA
GridModel: Quantifoil R2/2 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV / Details: 100% humidity, 16C.

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 794072
CTF correctionSoftware - Name: cryoSPARC / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 2.72 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 160179
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: cryoSPARC
Final angle assignmentType: MAXIMUM LIKELIHOOD

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Atomic model buiding 1

Initial modelPDB ID:

2hrt


Chain - Source name: PDB / Chain - Initial model type: experimental model
RefinementProtocol: BACKBONE TRACE
Output model

PDB-9hwk:
Structure of the Cytochrome o ubiquinol oxidase embedded in the nanodisc

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