2P5Z

The E. coli c3393 protein is a component of the type VI secretion system and exhibits structural similarity to T4 bacteriophage tail proteins gp27 and gp5


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 

wwPDB Validation   3D Report Full Report


This is version 1.5 of the entry. See complete history


Literature

Type VI secretion apparatus and phage tail-associated protein complexes share a common evolutionary origin.

Leiman, P.G.Basler, M.Ramagopal, U.A.Bonanno, J.B.Sauder, J.M.Pukatzki, S.Burley, S.K.Almo, S.C.Mekalanos, J.J.

(2009) Proc Natl Acad Sci U S A 106: 4154-4159

  • DOI: 10.1073/pnas.0813360106
  • Primary Citation of Related Structures:  
    2P5Z

  • PubMed Abstract: 
  • Protein secretion is a common property of pathogenic microbes. Gram-negative bacterial pathogens use at least 6 distinct extracellular protein secretion systems to export proteins through their multilayered cell envelope and in some cases into host cells ...

    Protein secretion is a common property of pathogenic microbes. Gram-negative bacterial pathogens use at least 6 distinct extracellular protein secretion systems to export proteins through their multilayered cell envelope and in some cases into host cells. Among the most widespread is the newly recognized Type VI secretion system (T6SS) which is composed of 15-20 proteins whose biochemical functions are not well understood. Using crystallographic, biochemical, and bioinformatic analyses, we identified 3 T6SS components, which are homologous to bacteriophage tail proteins. These include the tail tube protein; the membrane-penetrating needle, situated at the distal end of the tube; and another protein associated with the needle and tube. We propose that T6SS is a multicomponent structure whose extracellular part resembles both structurally and functionally a bacteriophage tail, an efficient machine that translocates proteins and DNA across lipid membranes into cells.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, IN 47906, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Type VI secretion system componentA [auth X]491Escherichia coli O6Mutation(s): 0 
Gene Names: c3393
UniProt
Find proteins for A0A0H2VBP9 (Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC))
Explore A0A0H2VBP9 
Go to UniProtKB:  A0A0H2VBP9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0A0H2VBP9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.219 
  • Space Group: P 63
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 116.351α = 90
b = 116.351β = 90
c = 80.584γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
REFMACrefinement
PDB_EXTRACTdata extraction
MAR345data collection
HKL-2000data reduction
SHELXDphasing
SHELXEmodel building

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2007-04-03
    Type: Initial release
  • Version 1.1: 2008-05-01
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance
  • Version 1.3: 2017-10-18
    Changes: Refinement description
  • Version 1.4: 2018-11-14
    Changes: Data collection, Structure summary
  • Version 1.5: 2021-02-03
    Changes: Database references, Structure summary