6V98

Crystal structure of Type VI secretion system effector, TseH (VCA0285)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Envelope stress responses defend against type six secretion system attacks independently of immunity proteins.

Hersch, S.J.Watanabe, N.Stietz, M.S.Manera, K.Kamal, F.Burkinshaw, B.Lam, L.Pun, A.Li, M.Savchenko, A.Dong, T.G.

(2020) Nat Microbiol 5: 706-714

  • DOI: 10.1038/s41564-020-0672-6
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The arms race among microorganisms is a key driver in the evolution of not only the weapons but also defence mechanisms. Many Gram-negative bacteria use the type six secretion system (T6SS) to deliver toxic effectors directly into neighbouring cells. ...

    The arms race among microorganisms is a key driver in the evolution of not only the weapons but also defence mechanisms. Many Gram-negative bacteria use the type six secretion system (T6SS) to deliver toxic effectors directly into neighbouring cells. Defence against effectors requires cognate immunity proteins. However, here we show immunity-independent protection mediated by envelope stress responses in Escherichia coli and Vibrio cholerae against a V. cholerae T6SS effector, TseH. We demonstrate that TseH is a PAAR-dependent species-specific effector highly potent against Aeromonas species but not against its V. cholerae immunity mutant or E. coli. A structural analysis reveals TseH is probably a NlpC/P60-family cysteine endopeptidase. We determine that two envelope stress-response pathways, Rcs and BaeSR, protect E. coli from TseH toxicity by mechanisms including capsule synthesis. The two-component system WigKR (VxrAB) is critical for protecting V. cholerae from its own T6SS despite expressing immunity genes. WigR also regulates T6SS expression, suggesting a dual role in attack and defence. This deepens our understanding of how bacteria survive T6SS attacks and suggests that defence against the T6SS represents a major selective pressure driving the evolution of species-specific effectors and protective mechanisms mediated by envelope stress responses and capsule synthesis.


    Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. tdong@ucalgary.ca.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cysteine hydrolase
A
203Vibrio choleraeMutation(s): 0 
Gene Names: C9J66_18215ERS013186_03768ERS013193_04941ERS013197_05943ERS013198_03598ERS013200_03989ERS013202_03729ERS013206_03782FPV63_00060
Find proteins for Q9KMN9 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  Q9KMN9
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
CAF
Query on CAF
AL-PEPTIDE LINKINGC5 H12 As N O3 SCYS
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.176 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.756α = 90
b = 63.645β = 90
c = 70.292γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
HKL-3000data reduction
HKL-3000data scaling
Aimlessdata scaling
SHARPphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United States--

Revision History 

  • Version 1.0: 2020-01-15
    Type: Initial release
  • Version 1.1: 2020-03-11
    Changes: Database references
  • Version 1.2: 2020-05-13
    Changes: Database references