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- PDB-8rwn: CryoEM structure of the Hdr(ABC)2 subunits of the Elp-Hdr complex... -

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Basic information

Entry
Database: PDB / ID: 8rwn
TitleCryoEM structure of the Hdr(ABC)2 subunits of the Elp-Hdr complex of Methanothermobacter marburgensis
Components(H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit ...) x 3
KeywordsOXIDOREDUCTASE / Redox / Flavin-based electron bifurcation / methanogenesis / heterodisulfide reductase / F420-H2 oxidase
Function / homology
Function and homology information


H2:CoB-CoM heterodisulfide,ferredoxin reductase / CoB--CoM heterodisulfide reductase activity / methanogenesis / 4 iron, 4 sulfur cluster binding / metal ion binding / membrane / plasma membrane
Similarity search - Function
CoB--CoM heterodisulphide reductase, subunit C / CoB--CoM heterodisulphide reductase, subunit B / : / H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A-like / : / Cysteine-rich domain / Cysteine-rich domain / 4Fe-4S dicluster domain / Alanine dehydrogenase/PNT, C-terminal domain / 4Fe-4S dicluster domain ...CoB--CoM heterodisulphide reductase, subunit C / CoB--CoM heterodisulphide reductase, subunit B / : / H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A-like / : / Cysteine-rich domain / Cysteine-rich domain / 4Fe-4S dicluster domain / Alanine dehydrogenase/PNT, C-terminal domain / 4Fe-4S dicluster domain / Alanine dehydrogenase/pyridine nucleotide transhydrogenase, NAD(H)-binding domain / Alpha-helical ferredoxin / 4Fe-4S binding domain / FAD/NAD(P)-binding domain / Pyridine nucleotide-disulphide oxidoreductase / 4Fe-4S ferredoxin, iron-sulphur binding, conserved site / 4Fe-4S ferredoxin-type iron-sulfur binding region signature. / 4Fe-4S ferredoxin-type iron-sulfur binding domain profile. / 4Fe-4S ferredoxin-type, iron-sulphur binding domain / FAD/NAD(P)-binding domain superfamily
Similarity search - Domain/homology
Non-cubane [4Fe-4S]-cluster / FLAVIN-ADENINE DINUCLEOTIDE / IRON/SULFUR CLUSTER / H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit C / H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit B / H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A
Similarity search - Component
Biological speciesMethanothermobacter marburgensis (archaea)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 1.85 Å
AuthorsSan Segundo-Acosta, P. / Murphy, B.J.
Funding support Germany, 1items
OrganizationGrant numberCountry
Max Planck Society Germany
CitationJournal: To Be Published
Title: Altered electron flow in hydrogenotrophic methanogens under nickel limitation
Authors: Nomura, S. / San Segundo-Acosta, P. / Khant, J. / Murphy, B.J. / Shima, S.
History
DepositionFeb 5, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 14, 2025Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 14, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
b: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit B
B: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit B
c: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit C
C: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit C
A: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A
a: H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)259,11422
Polymers252,6206
Non-polymers6,49416
Water4,630257
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

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H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit ... , 3 types, 6 molecules bBcCAa

#1: Protein H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit B / CoB--CoM heterodisulfide reductase subunit B


Mass: 33496.371 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Methanothermobacter marburgensis (archaea)
References: UniProt: Q50755, H2:CoB-CoM heterodisulfide,ferredoxin reductase
#2: Protein H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit C / CoB--CoM heterodisulfide reductase iron-sulfur subunit C


Mass: 20548.727 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Methanothermobacter marburgensis (archaea)
References: UniProt: Q50754, H2:CoB-CoM heterodisulfide,ferredoxin reductase
#3: Protein H(2):CoB-CoM heterodisulfide,ferredoxin reductase subunit A / CoB--CoM heterodisulfide reductase iron-sulfur subunit A


Mass: 72264.961 Da / Num. of mol.: 2 / Source method: isolated from a natural source
Source: (natural) Methanothermobacter marburgensis (archaea)
References: UniProt: Q50756, H2:CoB-CoM heterodisulfide,ferredoxin reductase

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Non-polymers , 4 types, 273 molecules

#4: Chemical
ChemComp-9S8 / Non-cubane [4Fe-4S]-cluster


Mass: 351.640 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Fe4S4 / Feature type: SUBJECT OF INVESTIGATION
#5: Chemical
ChemComp-SF4 / IRON/SULFUR CLUSTER


Mass: 351.640 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: Fe4S4 / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-FAD / FLAVIN-ADENINE DINUCLEOTIDE


Mass: 785.550 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C27H33N9O15P2 / Feature type: SUBJECT OF INVESTIGATION / Comment: FAD*YM
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 257 / Source method: isolated from a natural source / Formula: H2O

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Details

Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: F420-dependent electron-donating proteins- heterodisulfide reductase complex (Elp-Hdr) from Methanothermobacter marburgensis (heterodisulfide reductase core and mobile arm, composite structure)
Type: COMPLEX / Entity ID: #1-#3 / Source: NATURAL
Molecular weightValue: 0.45 MDa / Experimental value: NO
Source (natural)Organism: Methanothermobacter marburgensis (archaea)
Buffer solutionpH: 7.6
Details: 50 mM Tris-HCl pH 7.6 containing 400 mM Ammonium sulfate.
SpecimenConc.: 1 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: NITROGEN / Humidity: 100 % / Chamber temperature: 277 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm / Alignment procedure: COMA FREE
Specimen holderCryogen: NITROGEN / Specimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingElectron dose: 65 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 7768
EM imaging opticsEnergyfilter name: GIF Bioquantum

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Processing

EM software
IDNameVersionCategory
2EPUimage acquisition
7UCSF ChimeraXmodel fitting
12cryoSPARC43D reconstruction
13Cootmodel refinement
14PHENIXmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 1.85 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 493925 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Details: Real space refinement after automated model building using Model Angelo
Atomic model buildingDetails: Automated model building using Model Angelo / Source name: Other / Type: other
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00314336
ELECTRON MICROSCOPYf_angle_d0.63219464
ELECTRON MICROSCOPYf_dihedral_angle_d5.9482084
ELECTRON MICROSCOPYf_chiral_restr0.0452180
ELECTRON MICROSCOPYf_plane_restr0.0042490

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