6H2D

Structure of the soluble AhlC of the tripartite alpha-pore forming toxin, AHL, from Aeromonas hydrophila.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.62 Å
  • R-Value Free: 0.334 
  • R-Value Work: 0.269 
  • R-Value Observed: 0.272 

Starting Model: experimental
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This is version 1.2 of the entry. See complete history


Literature

Identification and structural analysis of the tripartite alpha-pore forming toxin of Aeromonas hydrophila.

Wilson, J.S.Churchill-Angus, A.M.Davies, S.P.Sedelnikova, S.E.Tzokov, S.B.Rafferty, J.B.Bullough, P.A.Bisson, C.Baker, P.J.

(2019) Nat Commun 10: 2900-2900

  • DOI: https://doi.org/10.1038/s41467-019-10777-x
  • Primary Citation of Related Structures:  
    6GRJ, 6GRK, 6H2D, 6H2E, 6H2F, 6R1J

  • PubMed Abstract: 

    The alpha helical CytolysinA family of pore forming toxins (α-PFT) contains single, two, and three component members. Structures of the single component Eschericia coli ClyA and the two component Yersinia enterolytica YaxAB show both undergo conformational changes from soluble to pore forms, and oligomerization to produce the active pore. Here we identify tripartite α-PFTs in pathogenic Gram negative bacteria, including Aeromonas hydrophila (AhlABC). We show that the AhlABC toxin requires all three components for maximal cell lysis. We present structures of pore components which describe a bi-fold hinge mechanism for soluble to pore transition in AhlB and a contrasting tetrameric assembly employed by soluble AhlC to hide their hydrophobic membrane associated residues. We propose a model of pore assembly where the AhlC tetramer dissociates, binds a single membrane leaflet, recruits AhlB promoting soluble to pore transition, prior to AhlA binding to form the active hydrophilic lined pore.


  • Organizational Affiliation

    Department of Molecular Biology and Biotechnology, University of Sheffield, Firth Court, Western Bank, Sheffield, South Yorkshire, S10 2TN, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
AhlCA [auth P],
B [auth Q],
C [auth R],
D [auth S]
274Aeromonas hydrophila subsp. hydrophila AL09-71Mutation(s): 0 
Gene Names: SAMN05880569_102658
Membrane Entity: Yes 
UniProt
Find proteins for A0KLE2 (Aeromonas hydrophila subsp. hydrophila (strain ATCC 7966 / DSM 30187 / BCRC 13018 / CCUG 14551 / JCM 1027 / KCTC 2358 / NCIMB 9240 / NCTC 8049))
Explore A0KLE2 
Go to UniProtKB:  A0KLE2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0KLE2
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.62 Å
  • R-Value Free: 0.334 
  • R-Value Work: 0.269 
  • R-Value Observed: 0.272 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 65.07α = 90
b = 61.66β = 92.01
c = 129.77γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
xia2data reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Biotechnology and Biological Sciences Research CouncilUnited KingdomBB/F016832/1

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-10
    Type: Initial release
  • Version 1.1: 2019-07-17
    Changes: Data collection, Database references
  • Version 1.2: 2024-05-01
    Changes: Data collection, Database references, Refinement description