7RT7

Crystal structure of the RhsP2 C-terminal toxin domain in complex with its immunity protein, RhsI2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

An ADP-ribosyltransferase toxin kills bacterial cells by modifying structured non-coding RNAs.

Bullen, N.P.Sychantha, D.Thang, S.S.Culviner, P.H.Rudzite, M.Ahmad, S.Shah, V.S.Filloux, A.Prehna, G.Whitney, J.C.

(2022) Mol Cell 82: 3484-3498.e11

  • DOI: https://doi.org/10.1016/j.molcel.2022.08.015
  • Primary Citation of Related Structures:  
    7RT7

  • PubMed Abstract: 

    ADP-ribosyltransferases (ARTs) were among the first identified bacterial virulence factors. Canonical ART toxins are delivered into host cells where they modify essential proteins, thereby inactivating cellular processes and promoting pathogenesis. Our understanding of ARTs has since expanded beyond protein-targeting toxins to include antibiotic inactivation and DNA damage repair. Here, we report the discovery of RhsP2 as an ART toxin delivered between competing bacteria by a type VI secretion system of Pseudomonas aeruginosa. A structure of RhsP2 reveals that it resembles protein-targeting ARTs such as diphtheria toxin. Remarkably, however, RhsP2 ADP-ribosylates 2'-hydroxyl groups of double-stranded RNA, and thus, its activity is highly promiscuous with identified cellular targets including the tRNA pool and the RNA-processing ribozyme, ribonuclease P. Consequently, cell death arises from the inhibition of translation and disruption of tRNA processing. Overall, our data demonstrate a previously undescribed mechanism of bacterial antagonism and uncover an unprecedented activity catalyzed by ART enzymes.


  • Organizational Affiliation

    Michael DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, ON L8S 4K1, Canada; Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, ON L8S 4K1, Canada.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
RhsP2
A,
C [auth B],
E,
G,
I,
K
155Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: PA14_43100
UniProt
Find proteins for A0A0H2Z8A2 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Explore A0A0H2Z8A2 
Go to UniProtKB:  A0A0H2Z8A2
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2Z8A2
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
RhsI2144Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: DZ962_29645IPC1164_23695IPC737_11070PA52Ts2_2703
UniProt
Find proteins for A0A367GXM0 (Pseudomonas aeruginosa)
Explore A0A367GXM0 
Go to UniProtKB:  A0A367GXM0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A367GXM0
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.195 
  • R-Value Observed: 0.201 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 112.456α = 90
b = 112.456β = 90
c = 324.331γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing
Cootmodel building

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Canadian Institutes of Health Research (CIHR)CanadaPJT-175011
Natural Sciences and Engineering Research Council (NSERC, Canada)CanadaRGPIN-2018-04968

Revision History  (Full details and data files)

  • Version 1.0: 2022-08-17
    Type: Initial release
  • Version 1.1: 2023-03-29
    Changes: Database references