Crystal Structure of the RetS periplasmic domain

Experimental Data Snapshot

  • Resolution: 2.04 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

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This is version 1.2 of the entry. See complete history


Crystal structure and oligomeric state of the RetS signaling kinase sensory domain.

Jing, X.Jaw, J.Robinson, H.H.Schubot, F.D.

(2010) Proteins 78: 1631-1640

  • DOI: https://doi.org/10.1002/prot.22679
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The opportunistic pathogen Pseudomonas aeruginosa may cause both acute and chronic-persistent infections in predisposed individuals. Acute infections require the presence of a functional type III secretion system (T3SS), whereas chronic P. aeruginosa infections are characterized by the formation of drug-resistant biofilms. The T3SS and biofilm formation are reciprocally regulated by the signaling kinases LadS, RetS, and GacS. RetS downregulates biofilm formation and upregulates expression of the T3SS through a unique mechanism. RetS forms a heterodimeric complex with GacS and thus prevents GacS autophosphorylation and downstream signaling. The signals that regulate RetS are not known but RetS possesses a distinctive periplasmic sensor domain that is believed to serve as receptor for the regulatory ligand. We have determined the crystal structure of the RetS sensory domain at 2.0 A resolution. The structure closely resembles those of carbohydrate binding modules of other proteins, suggesting that the elusive ligands are likely carbohydrate moieties. In addition to the conserved beta-sandwich structure, the sensory domain features two alpha helices which create a unique surface topology. Protein-protein crosslinking and fluorescence energy transfer experiments also revealed that the sensory domain dimerizes with a dissociation constant of K(d) = 580 +/- 50 nM, a result with interesting implications for our understanding of the underlying signaling mechanism.

  • Organizational Affiliation

    Department of Biological Sciences, Life Science I, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24060, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Sensor protein
A, B
145Pseudomonas aeruginosa UCBPP-PA14Mutation(s): 0 
Gene Names: PA14_64230PA4856retSrets (AMINO ACIDS 41 - 185)
Find proteins for A0A0H2ZI10 (Pseudomonas aeruginosa (strain UCBPP-PA14))
Explore A0A0H2ZI10 
Go to UniProtKB:  A0A0H2ZI10
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2ZI10
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on MSE
A, B
Experimental Data & Validation

Experimental Data

  • Resolution: 2.04 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.164α = 90
b = 67.193β = 90
c = 86.214γ = 90
Software Package:
Software NamePurpose
PHENIXmodel building
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2010-02-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Refinement description, Version format compliance
  • Version 1.2: 2019-07-24
    Changes: Data collection, Derived calculations, Refinement description