Effector domain of Pseudomonas aeruginosa VgrG2b

Experimental Data Snapshot

  • Resolution: 3.20 Å
  • R-Value Free: 0.232 
  • R-Value Work: 0.223 
  • R-Value Observed: 0.224 

wwPDB Validation   3D Report Full Report

This is version 1.2 of the entry. See complete history


The Pseudomonas aeruginosa T6SS Delivers a Periplasmic Toxin that Disrupts Bacterial Cell Morphology.

Wood, T.E.Howard, S.A.Forster, A.Nolan, L.M.Manoli, E.Bullen, N.P.Yau, H.C.L.Hachani, A.Hayward, R.D.Whitney, J.C.Vollmer, W.Freemont, P.S.Filloux, A.

(2019) Cell Rep 29: 187-201.e7

  • DOI: https://doi.org/10.1016/j.celrep.2019.08.094
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The type VI secretion system (T6SS) is crucial in interbacterial competition and is a virulence determinant of many Gram-negative bacteria. Several T6SS effectors are covalently fused to secreted T6SS structural components such as the VgrG spike for delivery into target cells. In Pseudomonas aeruginosa, the VgrG2b effector was previously proposed to mediate bacterial internalization into eukaryotic cells. In this work, we find that the VgrG2b C-terminal domain (VgrG2b C-ter ) elicits toxicity in the bacterial periplasm, counteracted by a cognate immunity protein. We resolve the structure of VgrG2b C-ter and confirm it is a member of the zinc-metallopeptidase family of enzymes. We show that this effector causes membrane blebbing at midcell, which suggests a distinct type of T6SS-mediated growth inhibition through interference with cell division, mimicking the impact of β-lactam antibiotics. Our study introduces a further effector family to the T6SS arsenal and demonstrates that VgrG2b can target both prokaryotic and eukaryotic cells.

  • Organizational Affiliation

    MRC Centre for Molecular Bacteriology and Infection, Department of Life Sciences, Imperial College London, London SW7 2AZ, UK.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Effector domain of Pseudomonas aeruginosa VgrG2b
A, B
254Pseudomonas aeruginosa PAO1Mutation(s): 3 
Gene Names: PA0262
Find proteins for Q9I6M7 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I6M7 
Go to UniProtKB:  Q9I6M7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9I6M7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 78.31α = 90
b = 78.31β = 90
c = 115.344γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United KingdomMR/K001930/1

Revision History  (Full details and data files)

  • Version 1.0: 2019-07-24
    Type: Initial release
  • Version 1.1: 2020-02-05
    Changes: Database references, Source and taxonomy
  • Version 1.2: 2024-05-15
    Changes: Data collection, Database references