3HE1

Secreted protein Hcp3 from Pseudomonas aeruginosa.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Crystal structure of secretory protein Hcp3 from Pseudomonas aeruginosa.

Osipiuk, J.Xu, X.Cui, H.Savchenko, A.Edwards, A.Joachimiak, A.

(2011) J Struct Funct Genomics 12: 21-26

  • DOI: https://doi.org/10.1007/s10969-011-9107-1
  • Primary Citation of Related Structures:  
    3HE1

  • PubMed Abstract: 

    The Type VI secretion pathway transports proteins across the cell envelope of Gram-negative bacteria. Pseudomonas aeruginosa, an opportunistic Gram-negative bacterial pathogen infecting humans, uses the type VI secretion pathway to export specific effector proteins crucial for its pathogenesis. The HSI-I virulence locus encodes for several proteins that has been proposed to participate in protein transport including the Hcp1 protein, which forms hexameric rings that assemble into nanotubes in vitro. Two Hcp1 paralogues have been identified in the P. aeruginosa genome, Hsp2 and Hcp3. Here, we present the structure of the Hcp3 protein from P. aeruginosa. The overall structure of the monomer resembles Hcp1 despite the lack of amino-acid sequence similarity between the two proteins. The monomers assemble into hexamers similar to Hcp1. However, instead of forming nanotubes in head-to-tail mode like Hcp1, Hcp3 stacks its rings in head-to-head mode forming double-ring structures.


  • Organizational Affiliation

    Argonne National Laboratory, Biosciences Division, Midwest Center for Structural Genomics and Structural Biology Center, IL 60439, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Major exported Hcp3 protein
A, B, C, D, E
A, B, C, D, E, F
195Pseudomonas aeruginosaMutation(s): 0 
Gene Names: hcpCPA0263
UniProt
Find proteins for Q9HI36 (Pseudomonas aeruginosa (strain ATCC 15692 / DSM 22644 / CIP 104116 / JCM 14847 / LMG 12228 / 1C / PRS 101 / PAO1))
Explore Q9HI36 
Go to UniProtKB:  Q9HI36
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HI36
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
MSE
Query on MSE
A, B, C, D, E
A, B, C, D, E, F
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.254 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.216 
  • Space Group: P 3 1 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.219α = 90
b = 141.219β = 90
c = 105.052γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
SBC-Collectdata collection
HKL-3000data reduction
SHELXDphasing
MLPHAREphasing
DMphasing
SOLVEphasing
RESOLVEphasing
HKL-3000phasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2009-06-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 1.2: 2012-07-25
    Changes: Database references
  • Version 1.3: 2017-11-01
    Changes: Advisory, Refinement description