5MXN

Atomic model of the VipA/VipB/Hcp, the type six secretion system non-contractile sheath-tube of Vibrio cholerae from cryo-EM

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 

Literature

Cryo-EM structure of the extended type VI secretion system sheath-tube complex.

Wang, J., Brackmann, M., Castano-Diez, D., Kudryashev, M., Goldie, K.N., Maier, T., Stahlberg, H., Basler, M.

(2017) Nat Microbiol 2: 1507-1512

  • DOI: 10.1038/s41564-017-0020-7
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    • The bacterial type VI secretion system (T6SS) uses contraction of a long sheath to quickly thrust a tube with associated effectors across membranes of eukaryotic and bacterial cells 1-5 . Only limited structural information is available about the inh ...

    The bacterial type VI secretion system (T6SS) uses contraction of a long sheath to quickly thrust a tube with associated effectors across membranes of eukaryotic and bacterial cells 1-5 . Only limited structural information is available about the inherently unstable precontraction state of the T6SS. Here, we obtain a 3.7 Å resolution structure of a non-contractile sheath-tube complex using cryo-electron microscopy and show that it resembles the extended T6SS inside Vibrio cholerae cells. We build a pseudo-atomic model of the complete sheath-tube assembly, which provides a mechanistic understanding of coupling sheath contraction with pushing and rotating the inner tube for efficient target membrane penetration. Our data further show that sheath contraction exposes a buried recognition domain to specifically trigger the disassembly and recycling of the T6SS sheath by the cognate ATP-dependent unfoldase ClpV.

    Organizational Affiliation: 

    Focal Area Infection Biology, Biozentrum, University of Basel, Klingelbergstrasse 50/70, CH-4056, Basel, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Haemolysin co-regulated protein
1, 2, 3, 4, 5, 6
170Vibrio choleraeMutation(s): 0 
Gene Names: hcp (hcpA)
Find proteins for P72350 (Vibrio cholerae)
Go to UniProtKB:  P72350
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Type VI secretion protein
A, B, C, D, E, F
473Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Mutation(s): 0 
Find proteins for Q9KN57 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KN57
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Type VI secretion protein
a, b, c, d, e, f
159Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Mutation(s): 0 
Find proteins for Q9KN58 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KN58
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.7 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
SNSFSwitzerland31003A_159525

Revision History 

  • Version 1.0: 2017-08-02
    Type: Initial release
  • Version 1.1: 2017-10-11
    Type: Database references
  • Version 1.2: 2017-11-08
    Type: Database references