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: 2.6 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.217 

wwPDB Validation 3D Report Full Report


This is version 1.4 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.Usa 106: 4154-4159

  • DOI: 10.1073/pnas.0813360106

  • 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 c ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Type VI secretion system component
X
491Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC)Mutation(s): 0 
Find proteins for A0A0H2VBP9 (Escherichia coli O6:H1 (strain CFT073 / ATCC 700928 / UPEC))
Go to UniProtKB:  A0A0H2VBP9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.217 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 116.351α = 90.00
b = 116.351β = 90.00
c = 80.584γ = 120.00
Software Package:
Software NamePurpose
MAR345data collection
REFMACrefinement
DENZOdata reduction
SHELXDphasing
SCALEPACKdata scaling
PDB_EXTRACTdata extraction
SHELXEmodel building
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots


View more in-depth experimental data

Entry History 

Deposition Data

Revision History 

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