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- EMDB-50674: Triangle state of ACS found in the as-isolated state -

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Basic information

Entry
Database: EMDB / ID: EMD-50674
TitleTriangle state of ACS found in the as-isolated state
Map data
Sample
  • Complex: CODH/ACS complex
    • Protein or peptide: CO-methylating acetyl-CoA synthase
  • Ligand: NICKEL (II) ION
  • Ligand: IRON/SULFUR CLUSTER
  • Ligand: water
KeywordsCODH / ACS / CO2 fixation / reductive acetyl-CoA pathway / Wood-Ljungdahl pathway / OXIDOREDUCTASE
Function / homology
Function and homology information


CO-methylating acetyl-CoA synthase / CO-methylating acetyl-CoA synthase activity / anaerobic carbon-monoxide dehydrogenase activity / acetyl-CoA metabolic process / 4 iron, 4 sulfur cluster binding / metal ion binding
Similarity search - Function
Carbon monoxide dehydrogenase subunit alpha ,N-terminal / Carbon monoxide dehydrogenase subunit alpha N-terminal domain / CO dehydrogenase/acetyl-CoA synthase complex beta subunit / Bifunctional carbon monoxide dehydrogenase/acetyl-coa synthase, domain 3 superfamily / CO dehydrogenase/acetyl-CoA synthase complex beta subunit , C-terminal / CO dehydrogenase/acetyl-CoA synthase complex beta subunit / ACS/CODH beta subunit C-terminal / Prismane-like, alpha/beta-sandwich / Prismane-like superfamily
Similarity search - Domain/homology
CO-methylating acetyl-CoA synthase
Similarity search - Component
Biological speciesCarboxydothermus hydrogenoformans (bacteria)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.42 Å
AuthorsRuickoldt J / Wendler P / Dobbek H
Funding support Germany, 1 items
OrganizationGrant numberCountry
German Research Foundation (DFG)EXC 2008/1 390540038 Germany
CitationJournal: To Be Published
Title: The CODH/ACS complex caught in action
Authors: Ruickoldt J / Wendler P / Dobbek H
History
DepositionJun 18, 2024-
Header (metadata) releaseJul 2, 2025-
Map releaseJul 2, 2025-
UpdateJul 2, 2025-
Current statusJul 2, 2025Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_50674.png

Downloads & links

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Map

FileDownload / File: emd_50674.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.23 Å/pix.
x 300 pix.
= 369. Å		1.23 Å/pix.
x 300 pix.
= 369. Å		1.23 Å/pix.
x 300 pix.
= 369. Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.23 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.1
Minimum - Maximum-0.26383427 - 1.0597944
Average (Standard dev.)-0.00033878378 (±0.009556657)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 369.0 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_50674_msk_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_50674_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_50674_half_map_2.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : CODH/ACS complex

EntireName: CODH/ACS complex
Components
  • Complex: CODH/ACS complex
    • Protein or peptide: CO-methylating acetyl-CoA synthase
  • Ligand: NICKEL (II) ION
  • Ligand: IRON/SULFUR CLUSTER
  • Ligand: water

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Supramolecule #1: CODH/ACS complex

SupramoleculeName: CODH/ACS complex / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 / Details: half-closed state
Source (natural)Organism: Carboxydothermus hydrogenoformans (bacteria)

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Macromolecule #1: CO-methylating acetyl-CoA synthase

MacromoleculeName: CO-methylating acetyl-CoA synthase / type: protein_or_peptide / ID: 1 / Number of copies: 3 / Enantiomer: LEVO / EC number: CO-methylating acetyl-CoA synthase
Source (natural)Organism: Carboxydothermus hydrogenoformans (bacteria)
Molecular weightTheoretical: 82.387469 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: INFDQIFEGA IEPGKEPKRL FKEVYEGAIT ATSYAEILLS RAIEKYGPDH PVGYPDTAYF LPVIRAFSGE EVRTLKDMVP ILNRMRAQI KSELTFENAR LAGEATWYAA EIIEALRYLK HTPENPIVVP PWTGFIGDPV VRQYGIKMVD WTIPGEAIII G RAKDSKAA ...String:
INFDQIFEGA IEPGKEPKRL FKEVYEGAIT ATSYAEILLS RAIEKYGPDH PVGYPDTAYF LPVIRAFSGE EVRTLKDMVP ILNRMRAQI KSELTFENAR LAGEATWYAA EIIEALRYLK HTPENPIVVP PWTGFIGDPV VRQYGIKMVD WTIPGEAIII G RAKDSKAA KKIVDDLMGK GLMLFLCDEI IEQLLEENVK LGVDYIAYPL GNFTQVVHAA NYALRAGLMF GGIAPGLRDA HR DYQRRRV LAFVLYLGEH DMVKTAAAMG AIFTGFPVIT DQPLPEDKQI KDWFISEPDY DKIVQTALEV RGIKITSIDI DLP INFGPA FEGESIRKGD MHVEFGGGKT PSFELVRMVG PDEIEDGKVE VIGPDIDSVE PGGRLPIGIV VDIYGRKMQE DFEP VLERR IHYFTNYGEG FWHTAQRDLT WVRISKEAFA KGARLKHLGQ LLYAKFKQEF PSIVDRVQVT IYTDEQKVLE LREIA RKKY AERDARLREL SDEAVDTYYS CLLCQSFAPT HVCIVSPERV GLCGAISWLD AKAAYEINPN GPNQPIPKEG LIDPVK GQW ESFNEYIYKN SQRTIERMNL YTIMEYPMTS CGCFEAIMAY LPELNGFMIV NREHSGMTPI GMTFSTLAGM VGGGTQT PG FMGIGKSYIG SRKFVKADGG LARVVWMPKD LKEQLRSIIE ERAEEEGLGR DFIDKIADET VGTTVDEVLP FLEEKGHP A LSMEPLLRSH H

UniProtKB: CO-methylating acetyl-CoA synthase

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Macromolecule #2: NICKEL (II) ION

MacromoleculeName: NICKEL (II) ION / type: ligand / ID: 2 / Number of copies: 6 / Formula: NI
Molecular weightTheoretical: 58.693 Da
Chemical component information

ChemComp-NI:
NICKEL (II) ION

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Macromolecule #3: IRON/SULFUR CLUSTER

MacromoleculeName: IRON/SULFUR CLUSTER / type: ligand / ID: 3 / Number of copies: 3 / Formula: SF4
Molecular weightTheoretical: 351.64 Da
Chemical component information

ChemComp-FS1:
IRON/SULFUR CLUSTER

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Macromolecule #4: water

MacromoleculeName: water / type: ligand / ID: 4 / Number of copies: 126 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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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

BufferpH: 7.6
Component:
ConcentrationNameFormula
50.0 mMMops
150.0 mMsodium chlorideNaCl
VitrificationCryogen name: ETHANE / Chamber humidity: 75 % / Chamber temperature: 291 K / Instrument: HOMEMADE PLUNGER

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Electron microscopy

MicroscopeTFS KRIOS
Specialist opticsEnergy filter - Name: GIF Bioquantum / Energy filter - Slit width: 10 eV
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 57.2 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 2.7 µm / Nominal defocus min: 0.8 µm
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

CTF correctionSoftware - Name: cryoSPARC (ver. 4.3.0) / Type: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7zkj

Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.42 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 104000
Initial angle assignmentType: ANGULAR RECONSTITUTION
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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