7NSU

ColicinE9 intact translocation complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 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

Porin threading drives receptor disengagement and establishes active colicin transport through Escherichia coli OmpF.

Francis, M.R.Webby, M.N.Housden, N.G.Kaminska, R.Elliston, E.Chinthammit, B.Lukoyanova, N.Kleanthous, C.

(2021) EMBO J 40: e108610-e108610

  • DOI: https://doi.org/10.15252/embj.2021108610
  • Primary Citation of Related Structures:  
    7NST, 7NSU

  • PubMed Abstract: 

    Bacteria deploy weapons to kill their neighbours during competition for resources and to aid survival within microbiomes. Colicins were the first such antibacterial system identified, yet how these bacteriocins cross the outer membrane (OM) of Escherichia coli is unknown. Here, by solving the structures of translocation intermediates via cryo-EM and by imaging toxin import, we uncover the mechanism by which the Tol-dependent nuclease colicin E9 (ColE9) crosses the bacterial OM. We show that threading of ColE9's disordered N-terminal domain through two pores of the trimeric porin OmpF causes the colicin to disengage from its primary receptor, BtuB, and reorganises the translocon either side of the membrane. Subsequent import of ColE9 through the lumen of a single OmpF subunit is driven by the proton-motive force, which is delivered by the TolQ-TolR-TolA-TolB assembly. Our study answers longstanding questions, such as why OmpF is a better translocator than OmpC, and reconciles the mechanisms by which both Tol- and Ton-dependent bacteriocins cross the bacterial outer membrane.


  • Organizational Affiliation

    Department of Biochemistry, University of Oxford, Oxford, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Outer membrane protein F
A, B, C
340Escherichia coli K-12Mutation(s): 0 
Gene Names: ompFcmlBcoacrytolFb0929JW0912
Membrane Entity: Yes 
UniProt
Find proteins for P02931 (Escherichia coli (strain K12))
Explore P02931 
Go to UniProtKB:  P02931
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02931
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Colicin-E9582Escherichia coliMutation(s): 1 
Gene Names: colcei
EC: 3.1
UniProt
Find proteins for P09883 (Escherichia coli)
Explore P09883 
Go to UniProtKB:  P09883
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP09883
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Tol-Pal system protein TolB430Escherichia coli K-12Mutation(s): 1 
Gene Names: tolBFAZ83_17845
Membrane Entity: Yes 
UniProt
Find proteins for P0A855 (Escherichia coli (strain K12))
Explore P0A855 
Go to UniProtKB:  P0A855
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0A855
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 4
MoleculeChains Sequence LengthOrganismDetailsImage
Vitamin B12 transporter BtuB594Escherichia coli K-12Mutation(s): 0 
Gene Names: btuBbfecerdcrCb3966JW3938
Membrane Entity: Yes 
UniProt
Find proteins for P06129 (Escherichia coli (strain K12))
Explore P06129 
Go to UniProtKB:  P06129
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP06129
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.70 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
European Research Council (ERC)--

Revision History  (Full details and data files)

  • Version 1.0: 2021-08-11
    Type: Initial release
  • Version 1.1: 2021-10-13
    Changes: Data collection, Database references
  • Version 1.2: 2021-11-10
    Changes: Data collection, Database references
  • Version 1.3: 2021-11-17
    Changes: Data collection, Database references