6NJP

Structure of the assembled ATPase EscN in complex with its central stalk EscO from the enteropathogenic E. coli (EPEC) type III secretion system

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history. 


Literature

Cryo-EM structure of the homohexameric T3SS ATPase-central stalk complex reveals rotary ATPase-like asymmetry.

Majewski, D.D., Worrall, L.J., Hong, C., Atkinson, C.E., Vuckovic, M., Watanabe, N., Yu, Z., Strynadka, N.C.J.

(2019) Nat Commun 10: 626-626

  • DOI: 10.1038/s41467-019-08477-7
  • Primary Citation of Related Structures:  
    6NJO, 6NJP

  • PubMed Abstract: 

    • Many Gram-negative bacteria, including causative agents of dysentery, plague, and typhoid fever, rely on a type III secretion system - a multi-membrane spanning syringe-like apparatus - for their pathogenicity. The cytosolic ATPase complex of this in ...

    Many Gram-negative bacteria, including causative agents of dysentery, plague, and typhoid fever, rely on a type III secretion system - a multi-membrane spanning syringe-like apparatus - for their pathogenicity. The cytosolic ATPase complex of this injectisome is proposed to play an important role in energizing secretion events and substrate recognition. We present the 3.3 Å resolution cryo-EM structure of the enteropathogenic Escherichia coli ATPase EscN in complex with its central stalk EscO. The structure shows an asymmetric pore with different functional states captured in its six catalytic sites, details directly supporting a rotary catalytic mechanism analogous to that of the heterohexameric F 1 /V 1 -ATPases despite its homohexameric nature. Situated at the C-terminal opening of the EscN pore is one molecule of EscO, with primary interaction mediated through an electrostatic interface. The EscN-EscO structure provides significant atomic insights into how the ATPase contributes to type III secretion, including torque generation and binding of chaperone/substrate complexes.

    Organizational Affiliation: 

    Department of Biochemistry and Molecular Biology and the Center for Blood Research, University of British Columbia, Vancouver, BC, Canada. ncjs@mail.ubc.ca.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Translocator EscNA, B, C, D, E, F449Escherichia coli O127:H6 str. E2348/69Mutation(s): 0 
Gene Names: escN, E2348C_3948
EC: 7.1.2.2
Find proteins for B7UMA6 (Escherichia coli O127:H6 (strain E2348/69 / EPEC))
Explore B7UMA6 
Go to UniProtKB:  B7UMA6
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
EscOG128Escherichia coli O127:H6 str. E2348/69Mutation(s): 0 
Gene Names: E2348C_3947
Find proteins for B7UMA5 (Escherichia coli O127:H6 (strain E2348/69 / EPEC))
Explore B7UMA5 
Go to UniProtKB:  B7UMA5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.29 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Natural Sciences and Engineering Research Council (NSERC, Canada)Canada--
Canadian Institutes of Health Research (CIHR)Canada--
Howard Hughes Medical Institute (HHMI)United States--

Revision History 

  • Version 1.0: 2019-02-20
    Type: Initial release
  • Version 1.1: 2019-11-20
    Changes: Author supporting evidence