4EOB

Structure of the type VI peptidoglycan amidase effector Tse1 from Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.186 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of a peptidoglycan amidase effector targeted to Gram-negative bacteria by the type VI secretion system.

Chou, S.Bui, N.K.Russell, A.B.Lexa, K.W.Gardiner, T.E.LeRoux, M.Vollmer, W.Mougous, J.D.

(2012) Cell Rep 1: 656-664

  • DOI: https://doi.org/10.1016/j.celrep.2012.05.016
  • Primary Citation of Related Structures:  
    4EOB, 4F4M

  • PubMed Abstract: 

    The target range of a bacterial secretion system can be defined by effector substrate specificity or by the efficacy of effector delivery. Here, we report the crystal structure of Tse1, a type VI secretion (T6S) bacteriolytic amidase effector from Pseudomonas aeruginosa. Consistent with its role as a toxin, Tse1 has a more accessible active site than related housekeeping enzymes. The activity of Tse1 against isolated peptidoglycan shows its capacity to act broadly against Gram-negative bacteria and even certain Gram-positive species. Studies with intact cells indicate that Gram-positive bacteria can remain vulnerable to Tse1 despite cell wall modifications. However, interbacterial competition studies demonstrate that Tse1-dependent lysis is restricted to Gram-negative targets. We propose that the previously observed specificity for T6S against Gram-negative bacteria is a consequence of high local effector concentration achieved by T6S-dependent targeting to its site of action rather than inherent effector substrate specificity.


  • Organizational Affiliation

    Department of Microbiology, University of Washington, Seattle, WA 98195, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
type VI amidase effector Tse1
A, B, C, D
162Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: PA1844
UniProt
Find proteins for Q9I2Q1 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9I2Q1 
Go to UniProtKB:  Q9I2Q1
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9I2Q1
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.61 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.186 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 38.662α = 90
b = 107.578β = 94.23
c = 84.396γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
PHENIXmodel building
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-30
    Type: Initial release
  • Version 1.1: 2012-06-06
    Changes: Database references, Structure summary
  • Version 1.2: 2012-07-11
    Changes: Database references
  • Version 1.3: 2013-03-27
    Changes: Database references
  • Version 1.4: 2023-12-27
    Changes: Data collection, Database references, Derived calculations