Crystal structure of the periplasmic domain of TgpA from Pseudomonas aeruginosa bound to ethylmercury

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 

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Structural and functional characterization of TgpA, a critical protein for the viability of Pseudomonas aeruginosa.

Uruburu, M.Mastrangelo, E.Bolognesi, M.Ferrara, S.Bertoni, G.Milani, M.

(2019) J Struct Biol 205: 18-25

  • DOI: https://doi.org/10.1016/j.jsb.2018.12.004
  • Primary Citation of Related Structures:  
    6G49, 6G4H

  • PubMed Abstract: 

    Pseudomonas aeruginosa is an opportunistic pathogen associated with severe diseases, such as cystic fibrosis. During an extensive search for novel essential genes, we identified tgpA (locus PA2873) in P. aeruginosa PAO1, as a gene playing a critical role in bacterial viability. TgpA, the translated protein, is an internal membrane protein with a periplasmic soluble domain, predicted to be endowed with a transglutaminase-like fold, hosting the Cys404, His448, and Asp464 triad. We report here that Cys404 mutation hampers the essential role of TgpA in granting P. aeruginosa viability. Moreover, we present the crystal structure of the TgpA periplasmic domain at 1.6 Å resolution as a first step towards structure-activity analysis of a new potential target for the discovery of antibacterial compounds.

  • Organizational Affiliation

    Dipartimento di Bioscienze, Università di Milano, Via Celoria 26, I-20133 Milano, Italy.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein-glutamine gamma-glutamyltransferase338Pseudomonas aeruginosa PAO1Mutation(s): 0 
Gene Names: tgpAPA2873
Find proteins for Q9HZX3 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HZX3 
Go to UniProtKB:  Q9HZX3
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HZX3
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.156 
  • R-Value Observed: 0.158 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.47α = 90
b = 72.47β = 90
c = 157.53γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-04-10
    Type: Initial release
  • Version 1.1: 2019-04-24
    Changes: Data collection, Database references
  • Version 1.2: 2024-05-08
    Changes: Advisory, Data collection, Database references