3TU3

1.92 Angstrom resolution crystal structure of the full-length SpcU in complex with full-length ExoU from the type III secretion system of Pseudomonas aeruginosa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.92 Å
  • R-Value Free: 0.225 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.193 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the Type III Secretion Effector Protein ExoU in Complex with Its Chaperone SpcU.

Halavaty, A.S.Borek, D.Tyson, G.H.Veesenmeyer, J.L.Shuvalova, L.Minasov, G.Otwinowski, Z.Hauser, A.R.Anderson, W.F.

(2012) PLoS One 7: e49388-e49388

  • DOI: 10.1371/journal.pone.0049388
  • Primary Citation of Related Structures:  
    3TU3

  • PubMed Abstract: 
  • Disease causing bacteria often manipulate host cells in a way that facilitates the infectious process. Many pathogenic gram-negative bacteria accomplish this by using type III secretion systems. In these complex secretion pathways, bacterial chaperones direct effector proteins to a needle-like secretion apparatus, which then delivers the effector protein into the host cell cytosol ...

    Disease causing bacteria often manipulate host cells in a way that facilitates the infectious process. Many pathogenic gram-negative bacteria accomplish this by using type III secretion systems. In these complex secretion pathways, bacterial chaperones direct effector proteins to a needle-like secretion apparatus, which then delivers the effector protein into the host cell cytosol. The effector protein ExoU and its chaperone SpcU are components of the Pseudomonas aeruginosa type III secretion system. Secretion of ExoU has been associated with more severe infections in both humans and animal models. Here we describe the 1.92 Å X-ray structure of the ExoU-SpcU complex, a full-length type III effector in complex with its full-length cognate chaperone. Our crystallographic data allow a better understanding of the mechanism by which ExoU kills host cells and provides a foundation for future studies aimed at designing inhibitors of this potent toxin.


    Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ExoU chaperoneA161Pseudomonas aeruginosaMutation(s): 0 
Gene Names: 
UniProt
Find proteins for O66100 (Pseudomonas aeruginosa)
Explore O66100 
Go to UniProtKB:  O66100
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO66100
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ExoUB711Pseudomonas aeruginosaMutation(s): 0 
Gene Names: EXC2exoUpepARS14DZ962_02360F3H14_28460F7O98_20455PERCYII40_4603
UniProt
Find proteins for O34208 (Pseudomonas aeruginosa)
Explore O34208 
Go to UniProtKB:  O34208
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO34208
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 154.14α = 90
b = 52.583β = 126.59
c = 119.539γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
SBC-Collectdata collection
SHELXDphasing
BUCCANEERmodel building
REFMACrefinement
HKL-3000data reduction
HKL-3000data scaling
BUCCANEERphasing

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2012-05-23
    Type: Initial release
  • Version 1.1: 2012-12-05
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description