6G96

Crystal structure of TacT3 (tRNA acetylating toxin) from Salmonella


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Activity of acetyltransferase toxins involved in Salmonella persister formation during macrophage infection.

Rycroft, J.A.Gollan, B.Grabe, G.J.Hall, A.Cheverton, A.M.Larrouy-Maumus, G.Hare, S.A.Helaine, S.

(2018) Nat Commun 9: 1993-1993

  • DOI: 10.1038/s41467-018-04472-6
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Non-typhoidal Salmonella strains are responsible for invasive infections associated with high mortality and recurrence in sub-Saharan Africa, and there is strong evidence for clonal relapse following antibiotic treatment. Persisters are non-growing b ...

    Non-typhoidal Salmonella strains are responsible for invasive infections associated with high mortality and recurrence in sub-Saharan Africa, and there is strong evidence for clonal relapse following antibiotic treatment. Persisters are non-growing bacteria that are thought to be responsible for the recalcitrance of many infections to antibiotics. Toxin-antitoxin systems are stress-responsive elements that are important for Salmonella persister formation, specifically during infection. Here, we report the analysis of persister formation of clinical invasive strains of Salmonella Typhimurium and Enteritidis in human primary macrophages. We show that all the invasive clinical isolates of both serovars that we tested produce high levels of persisters following internalization by human macrophages. Our genome comparison reveals that S. Enteritidis and S. Typhimurium strains contain three acetyltransferase toxins that we characterize structurally and functionally. We show that all induce the persister state by inhibiting translation through acetylation of aminoacyl-tRNAs. However, they differ in their potency and target partially different subsets of aminoacyl-tRNAs, potentially accounting for their non-redundant effect.


    Organizational Affiliation

    Section of Microbiology, Medical Research Council Centre for Molecular Bacteriology and Infection, Imperial College London, Armstrong Road, London, SW7 2AZ, UK. s.helaine@imperial.ac.uk.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AcetyltransferaseA, B176Salmonella enterica subsp. enterica serovar TyphimuriumMutation(s): 1 
Gene Names: CU490_09610CX046_09695DD95_05355
Find proteins for Q7CPW9 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720))
Explore Q7CPW9 
Go to UniProtKB:  Q7CPW9
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download CCD File 
A, B
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
 Ligand Interaction
BCN
Query on BCN

Download CCD File 
B
BICINE
C6 H13 N O4
FSVCELGFZIQNCK-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

Download CCD File 
A, B
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.48 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.210 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.786α = 90
b = 71.202β = 90
c = 86.313γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
PHENIXrefinement
AutoPROCdata scaling
PHASERphasing
Cootmodel building
AutoPROCdata reduction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (United Kingdom)United Kingdom--

Revision History 

  • Version 1.0: 2018-05-16
    Type: Initial release
  • Version 1.1: 2018-05-30
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-06
    Changes: Data collection, Refinement description