6U8Y

Structure of the membrane-bound sulfane sulfur reductase (MBS), an archaeal respiratory membrane complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure of the respiratory MBS complex reveals iron-sulfur cluster catalyzed sulfane sulfur reduction in ancient life.

Yu, H.Haja, D.K.Schut, G.J.Wu, C.H.Meng, X.Zhao, G.Li, H.Adams, M.W.W.

(2020) Nat Commun 11: 5953-5953

  • DOI: https://doi.org/10.1038/s41467-020-19697-7
  • Primary Citation of Related Structures:  
    6U8Y

  • PubMed Abstract: 

    Modern day aerobic respiration in mitochondria involving complex I converts redox energy into chemical energy and likely evolved from a simple anaerobic system now represented by hydrogen gas-evolving hydrogenase (MBH) where protons are the terminal electron acceptor. Here we present the cryo-EM structure of an early ancestor in the evolution of complex I, the elemental sulfur (S 0 )-reducing reductase MBS. Three highly conserved protein loops linking cytoplasmic and membrane domains enable scalable energy conversion in all three complexes. MBS contains two proton pumps compared to one in MBH and likely conserves twice the energy. The structure also reveals evolutionary adaptations of MBH that enabled S 0 reduction by MBS catalyzed by a site-differentiated iron-sulfur cluster without participation of protons or amino acid residues. This is the simplest mechanism proposed for reduction of inorganic or organic disulfides. It is of fundamental significance in the iron and sulfur-rich volcanic environments of early earth and possibly the origin of life. MBS provides a new perspective on the evolution of modern-day respiratory complexes and of catalysis by biological iron-sulfur clusters.


  • Organizational Affiliation

    Structural Biology Program, Van Andel Institute, Grand Rapids, MI, USA.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Monovalent cation/H+ antiporter subunit EA,
N [auth a]
168Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6UQN5 (Pyrococcus furiosus COM1)
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UniProt GroupI6UQN5
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Monovalent cation/H+ antiporter subunit FB,
O [auth b]
84Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6UZW2 (Pyrococcus furiosus COM1)
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Monovalent cation/H+ antiporter subunit GC,
P [auth c]
124Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6TXQ5 (Pyrococcus furiosus COM1)
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Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
DUF4040 domain-containing proteinD,
Q [auth d]
94Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6V2A4 (Pyrococcus furiosus COM1)
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Entity ID: 5
MoleculeChains Sequence LengthOrganismDetailsImage
Monovalent cation/H+ antiporter subunit BE,
R [auth e]
235Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6U860 (Pyrococcus furiosus COM1)
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UniProt GroupI6U860
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Entity ID: 6
MoleculeChains Sequence LengthOrganismDetailsImage
Monovalent cation/H+ antiporter subunit CF [auth G],
S [auth g]
114Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6UQN0 (Pyrococcus furiosus COM1)
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Entity ID: 7
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit NG [auth H],
T [auth h]
493Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6UZV7 (Pyrococcus furiosus COM1)
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Entity ID: 8
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit MH [auth X],
U [auth x]
618Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for I6TXQ1 (Pyrococcus furiosus COM1)
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Entity ID: 9
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit BI [auth J],
V [auth j]
192Pyrococcus furiosus COM1Mutation(s): 0 
EC: 1.6.99.5
UniProt
Find proteins for I6UZV3 (Pyrococcus furiosus COM1)
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Entity ID: 10
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit CJ [auth K],
W [auth k]
174Pyrococcus furiosus COM1Mutation(s): 0 
EC: 1.6.99.5
UniProt
Find proteins for I6TXP7 (Pyrococcus furiosus COM1)
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Entity ID: 11
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit DK [auth L],
X [auth l]
391Pyrococcus furiosus COM1Mutation(s): 0 
EC: 1.6.99.5
UniProt
Find proteins for I6V297 (Pyrococcus furiosus COM1)
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Entity ID: 12
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunitL [auth M],
Y [auth m]
309Pyrococcus furiosus COM1Mutation(s): 0 
Membrane Entity: Yes 
UniProt
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Entity ID: 13
MoleculeChains Sequence LengthOrganismDetailsImage
NADH dehydrogenase subunit IM [auth N],
Z [auth n]
208Pyrococcus furiosus COM1Mutation(s): 0 
EC: 1.6.99.5
UniProt
Find proteins for I6U853 (Pyrococcus furiosus COM1)
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Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION2.1

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Department of Energy (DOE, United States)United StatesDE-SC0020085
Department of Energy (DOE, United States)United StatesDE-FG02-95ER20175

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-09
    Type: Initial release
  • Version 1.1: 2020-12-16
    Changes: Author supporting evidence, Structure summary
  • Version 1.2: 2021-03-24
    Changes: Database references
  • Version 1.3: 2024-03-20
    Changes: Data collection, Database references