6EF8

Cryo-EM of the OmcS nanowires from Geobacter sulfurreducens


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of Microbial Nanowires Reveals Stacked Hemes that Transport Electrons over Micrometers.

Wang, F.Gu, Y.O'Brien, J.P.Yi, S.M.Yalcin, S.E.Srikanth, V.Shen, C.Vu, D.Ing, N.L.Hochbaum, A.I.Egelman, E.H.Malvankar, N.S.

(2019) Cell 177: 361-369.e10

  • DOI: 10.1016/j.cell.2019.03.029
  • Primary Citation of Related Structures:  
    6EF8

  • PubMed Abstract: 
  • Long-range (>10 μm) transport of electrons along networks of Geobacter sulfurreducens protein filaments, known as microbial nanowires, has been invoked to explain a wide range of globally important redox phenomena. These nanowires were previously thought to be type IV pili composed of PilA protein ...

    Long-range (>10 μm) transport of electrons along networks of Geobacter sulfurreducens protein filaments, known as microbial nanowires, has been invoked to explain a wide range of globally important redox phenomena. These nanowires were previously thought to be type IV pili composed of PilA protein. Here, we report a 3.7 Å resolution cryoelectron microscopy structure, which surprisingly reveals that, rather than PilA, G. sulfurreducens nanowires are assembled by micrometer-long polymerization of the hexaheme cytochrome OmcS, with hemes packed within ∼3.5-6 Å of each other. The inter-subunit interfaces show unique structural elements such as inter-subunit parallel-stacked hemes and axial coordination of heme by histidines from neighboring subunits. Wild-type OmcS filaments show 100-fold greater conductivity than other filaments from a ΔomcS strain, highlighting the importance of OmcS to conductivity in these nanowires. This structure explains the remarkable capacity of soil bacteria to transport electrons to remote electron acceptors for respiration and energy sharing.


    Organizational Affiliation

    Microbial Sciences Institute, Yale University, New Haven, CT 06516, USA; Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA. Electronic address: nikhil.malvankar@yale.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
C-type cytochrome OmcSA, B, C, D, E, F, G407Geobacter sulfurreducens PCAMutation(s): 0 
Gene Names: omcSGSU2504
UniProt
Find proteins for Q74A86 (Geobacter sulfurreducens (strain ATCC 51573 / DSM 12127 / PCA))
Explore Q74A86 
Go to UniProtKB:  Q74A86
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEC
Query on HEC

Download Ideal Coordinates CCD File 
AA [auth D] , BA [auth D] , CA [auth D] , DA [auth D] , EA [auth D] , FA [auth E] , GA [auth E] , H [auth A] , 
AA [auth D],  BA [auth D],  CA [auth D],  DA [auth D],  EA [auth D],  FA [auth E],  GA [auth E],  H [auth A],  HA [auth E],  I [auth A],  IA [auth E],  J [auth A],  JA [auth E],  K [auth A],  KA [auth E],  L [auth A],  LA [auth F],  M [auth A],  MA [auth F],  N [auth B],  NA [auth F],  O [auth B],  OA [auth F],  P [auth B],  PA [auth F],  Q [auth B],  QA [auth F],  R [auth B],  RA [auth G],  S [auth B],  SA [auth G],  T [auth C],  TA [auth G],  U [auth C],  UA [auth G],  V [auth C],  VA [auth G],  W [auth C],  WA [auth G],  X [auth C],  Y [auth C],  Z [auth D]
HEME C
C34 H34 Fe N4 O4
HXQIYSLZKNYNMH-LJNAALQVSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United StatesR35GM122510
National Institutes of Health/National Human Genome Research Institute (NIH/NHGRI)United States1DP2AI138259-01
National Science Foundation (NSF, United States)United States1749662

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-04-17
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence