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- PDB-9h1l: Methyl-coenzyme M reductase activation complex binding to the A2 ... -
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Open data
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Basic information
Entry | Database: PDB / ID: 9h1l | |||||||||||||||||||||||||||||||||||||||||||||
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Title | Methyl-coenzyme M reductase activation complex binding to the A2 component after incubation with ATP | |||||||||||||||||||||||||||||||||||||||||||||
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![]() | OXIDOREDUCTASE / Methyl-coenzyme M reductase / activation complex / ATPase / Iron-sulfur clusters | |||||||||||||||||||||||||||||||||||||||||||||
Function / homology | ![]() organic phosphonate catabolic process / coenzyme-B sulfoethylthiotransferase / coenzyme-B sulfoethylthiotransferase activity / methanogenesis / ATP hydrolysis activity / ATP binding / metal ion binding / cytoplasm Similarity search - Function | |||||||||||||||||||||||||||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||||||||||||||||||||||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.14 Å | |||||||||||||||||||||||||||||||||||||||||||||
![]() | Ramirez-Amador, F. / Paul, S. / Kumar, A. / Schuller, J.M. | |||||||||||||||||||||||||||||||||||||||||||||
Funding support | European Union, 1items
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![]() | ![]() Title: Structure of the ATP-driven methyl-coenzyme M reductase activation complex. Authors: Fidel Ramírez-Amador / Sophia Paul / Anuj Kumar / Christian Lorent / Sebastian Keller / Stefan Bohn / Thinh Nguyen / Stefano Lometto / Dennis Vlegels / Jörg Kahnt / Darja Deobald / Frank ...Authors: Fidel Ramírez-Amador / Sophia Paul / Anuj Kumar / Christian Lorent / Sebastian Keller / Stefan Bohn / Thinh Nguyen / Stefano Lometto / Dennis Vlegels / Jörg Kahnt / Darja Deobald / Frank Abendroth / Olalla Vázquez / Georg Hochberg / Silvan Scheller / Sven T Stripp / Jan Michael Schuller / ![]() ![]() Abstract: Methyl-coenzyme M reductase (MCR) is the enzyme responsible for nearly all biologically generated methane. Its active site comprises coenzyme F, a porphyrin-based cofactor with a central nickel ion ...Methyl-coenzyme M reductase (MCR) is the enzyme responsible for nearly all biologically generated methane. Its active site comprises coenzyme F, a porphyrin-based cofactor with a central nickel ion that is active exclusively in the Ni(I) state. How methanogenic archaea perform the reductive activation of F represents a major gap in our understanding of one of the most ancient bioenergetic systems in nature. Here we purified and characterized the MCR activation complex from Methanococcus maripaludis. McrC, a small subunit encoded in the mcr operon, co-purifies with the methanogenic marker proteins Mmp7, Mmp17, Mmp3 and the A2 component. We demonstrated that this complex can activate MCR in vitro in a strictly ATP-dependent manner, enabling the formation of methane. In addition, we determined the cryo-electron microscopy structure of the MCR activation complex exhibiting different functional states with local resolutions reaching 1.8-2.1 Å. Our data revealed three complex iron-sulfur clusters that formed an electron transfer pathway towards F. Topology and electron paramagnetic resonance spectroscopy analyses indicate that these clusters are similar to the [8Fe-9S-C] cluster, a maturation intermediate of the catalytic cofactor in nitrogenase. Altogether, our findings offer insights into the activation mechanism of MCR and prospects on the early evolution of nitrogenase. | |||||||||||||||||||||||||||||||||||||||||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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Downloads & links
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Download
PDBx/mmCIF format | ![]() | 811.9 KB | Display | ![]() |
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PDB format | ![]() | 655.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
Others | ![]() |
-Validation report
Arichive directory | ![]() ![]() | HTTPS FTP |
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-Related structure data
Related structure data | ![]() 51767MC ![]() 8s7vC ![]() 8s7xC C: citing same article ( M: map data used to model this data |
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Similar structure data | Similarity search - Function & homology ![]() |
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Links
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Assembly
Deposited unit | ![]()
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Components
-Protein , 4 types, 4 molecules JIKL
#1: Protein | Mass: 56520.801 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Methanogenesis marker protein 3 / Source: (natural) ![]() |
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#7: Protein | Mass: 24906.715 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Details: Methyl-coenzyme M reductase subunit C / Source: (gene. exp.) ![]() ![]() |
#8: Protein | Mass: 59572.562 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Methyl-coenzyme M reductase system component A2 / Source: (natural) ![]() |
#9: Protein | Mass: 10640.849 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: DUF2098 domain-containing protein / Source: (natural) ![]() |
-Methyl-coenzyme M reductase subunit ... , 3 types, 6 molecules ABEDCF
#2: Protein | Mass: 29665.488 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: Methyl-coenzyme M reductase subunit gamma / Source: (natural) ![]() References: UniProt: A0A2L1CBG2, coenzyme-B sulfoethylthiotransferase #3: Protein | Mass: 46701.203 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: Methyl-coenzyme M reductase subunit beta / Source: (natural) ![]() References: UniProt: A0A2L1CBB3, coenzyme-B sulfoethylthiotransferase #4: Protein | Mass: 61230.703 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Details: Methyl-coenzyme M reductase subunit alpha / Source: (natural) ![]() References: UniProt: A0A2L1CBB0, coenzyme-B sulfoethylthiotransferase |
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-Methanogenesis marker protein ... , 2 types, 2 molecules GH
#5: Protein | Mass: 21119.539 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Methanogenesis marker protein 17 / Source: (natural) ![]() |
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#6: Protein | Mass: 35024.746 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Details: Methanogenesis marker protein / Source: (natural) ![]() |
-Non-polymers , 8 types, 13 molecules 














#10: Chemical | #11: Chemical | ChemComp-COM / | #12: Chemical | ChemComp-TP7 / | #13: Chemical | ChemComp-SHT / | #14: Chemical | #15: Chemical | ChemComp-ZN / | #16: Chemical | #17: Chemical | |
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-Details
Has ligand of interest | Y |
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Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: 3D ARRAY / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Methyl-coenzyme M reductase activation complex binding to the A2 component after incubation with ATP Type: COMPLEX / Entity ID: #1-#9 / Source: NATURAL |
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Molecular weight | Value: 0.5 MDa / Experimental value: YES |
Source (natural) | Organism: ![]() |
Buffer solution | pH: 7.6 |
Buffer component | Conc.: 20 mM / Name: HEPES / Formula: C8H18N2O4S |
Specimen | Conc.: 1.25 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Specimen support | Details: 15 mA / Grid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R1.2/1.3 |
Vitrification | Instrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE-PROPANE / Humidity: 100 % / Chamber temperature: 277 K Details: Vitrification setup inside a Coy Lab's Vinyl anaerobic chamber to preserve the protein sample under strict anaerobic conditions (95% N2/ 5% H2) |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 500 nm / Cs: 2.7 mm |
Image recording | Electron dose: 60 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of real images: 28171 Details: Dataset obtained with 25 degree of pretilting to overcome preferred orientation issues |
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Processing
EM software |
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||||||||||||||
Particle selection | Num. of particles selected: 944627 | ||||||||||||||||||||||||||||||||||||
3D reconstruction | Resolution: 2.14 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 118247 / Symmetry type: POINT | ||||||||||||||||||||||||||||||||||||
Atomic model building | Protocol: AB INITIO MODEL / Space: REAL Details: Rigid body fitting in Chimera and Coot. Real-space refinement iterative rounds in Phenix. | ||||||||||||||||||||||||||||||||||||
Atomic model building | Source name: AlphaFold / Type: in silico model |