the structure of Pseudomonas aeruginosa Periplasmic gluconolactonase, PpgL

Experimental Data Snapshot

  • Resolution: 1.65 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural and Functional Insights into PpgL, a Metal-Independent beta-Propeller Gluconolactonase That Contributes toPseudomonas aeruginosaVirulence.

Song, Y.J.Wang, K.L.Shen, Y.L.Gao, J.Li, T.Zhu, Y.B.Li, C.C.He, L.H.Zhou, Q.X.Zhao, N.L.Zhao, C.Yang, J.Huang, Q.Mu, X.Y.Li, H.Dou, D.F.Liu, C.He, J.H.Sun, B.Bao, R.

(2019) Infect Immun 87

  • DOI: https://doi.org/10.1128/IAI.00847-18
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Biofilm formation is a critical determinant in the pathopoiesis of Pseudomonas aeruginosa It could significantly increase bacterial resistance to drugs and host defense. Thus, inhibition of biofilm matrix production could be regarded as a promising attempt to prevent colonization of P. aeruginosa and the subsequent infection. PpgL, a periplasmic gluconolactonase, has been reported to be involved in P. aeruginosa quorum-sensing (QS) system regulation. However, the detailed function and catalysis mechanism remain elusive. Here, the crystal structure of PpgL is described in the current study, along with biochemical analysis, revealing that PpgL is a typical β-propeller enzyme with unique metal-independent lactone hydrolysis activity. Consequently, comparative analysis of seven-bladed propeller lactone-catalyzing enzymes and mutagenesis studies identify the critical sites which contribute to the diverse catalytic and substrate recognition functions. In addition, the reduced biofilm formation and attenuated invasion phenotype resulting from deletion of ppgL confirm the importance of PpgL in P. aeruginosa pathogenesis. These results suggest that PpgL is a potential target for developing new agents against the diseases caused by P. aeruginosa .

  • Organizational Affiliation

    Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, China.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Periplasmic gluconolactonase, PpgL
A, B
364Pseudomonas aeruginosa PAO1Mutation(s): 0 
Find proteins for Q9HWH7 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HWH7 
Go to UniProtKB:  Q9HWH7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HWH7
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.65 Å
  • R-Value Free: 0.222 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.196 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 91.763α = 90
b = 91.763β = 90
c = 170.708γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
PHENIXmodel building
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-11-21
    Type: Initial release
  • Version 1.1: 2018-11-28
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-05
    Changes: Data collection, Database references
  • Version 1.3: 2023-11-22
    Changes: Data collection, Database references, Refinement description