5TCR

Atomic model of the Salmonella SPI-1 type III secretion injectisome basal body proteins InvG, PrgH, and PrgK


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Near-atomic-resolution cryo-EM analysis of the Salmonella T3S injectisome basal body.

Worrall, L.J.Hong, C.Vuckovic, M.Deng, W.Bergeron, J.R.Majewski, D.D.Huang, R.K.Spreter, T.Finlay, B.B.Yu, Z.Strynadka, N.C.

(2016) Nature 540: 597-601

  • DOI: 10.1038/nature20576
  • Primary Citation of Related Structures:  
    5TCQ, 5TCP, 5TCR

  • PubMed Abstract: 
  • The type III secretion (T3S) injectisome is a specialized protein nanomachine that is critical for the pathogenicity of many Gram-negative bacteria, including purveyors of plague, typhoid fever, whooping cough, sexually transmitted infections and major nosocomial infections ...

    The type III secretion (T3S) injectisome is a specialized protein nanomachine that is critical for the pathogenicity of many Gram-negative bacteria, including purveyors of plague, typhoid fever, whooping cough, sexually transmitted infections and major nosocomial infections. This syringe-shaped 3.5-MDa macromolecular assembly spans both bacterial membranes and that of the infected host cell. The internal channel formed by the injectisome allows for the direct delivery of partially unfolded virulence effectors into the host cytoplasm. The structural foundation of the injectisome is the basal body, a molecular lock-nut structure composed predominantly of three proteins that form highly oligomerized concentric rings spanning the inner and outer membranes. Here we present the structure of the prototypical Salmonella enterica serovar Typhimurium pathogenicity island 1 basal body, determined using single-particle cryo-electron microscopy, with the inner-membrane-ring and outer-membrane-ring oligomers defined at 4.3 Å and 3.6 Å resolution, respectively. This work presents the first, to our knowledge, high-resolution structural characterization of the major components of the basal body in the assembled state, including that of the widespread class of outer-membrane portals known as secretins.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology and the Center for Blood Research, University of British Columbia, Vancouver, British Columbia V6T 1Z3, Canada.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protein InvG
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O
562Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P35672 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P35672 
Go to UniProtKB:  P35672
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Lipoprotein PrgK235Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P41786 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P41786 
Go to UniProtKB:  P41786
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Protein PrgH263Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 0 
Membrane Entity: Yes 
UniProt
Find proteins for P41783 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore P41783 
Go to UniProtKB:  P41783
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.30 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)Canada--

Revision History  (Full details and data files)

  • Version 1.0: 2016-12-21
    Type: Initial release
  • Version 1.1: 2017-01-11
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2018-07-18
    Changes: Data collection, Experimental preparation
  • Version 1.4: 2020-01-15
    Changes: Author supporting evidence