3QR7

Crystal structure of the C-terminal fragment of the bacteriophage P2 membrane-piercing protein gpV

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.94 Å
  • R-Value Free: 0.112 
  • R-Value Work: 0.102 
  • R-Value Observed: 0.102 

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This is version 1.2 of the entry. See complete history. 


Literature

Phage pierces the host cell membrane with the iron-loaded spike.

Browning, C., Shneider, M.M., Bowman, V.D., Schwarzer, D., Leiman, P.G.

(2012) Structure 20: 326-339

  • DOI: 10.1016/j.str.2011.12.009
  • Primary Citation of Related Structures:  
    3PQH, 3PQI, 3QR7, 3QR8

  • PubMed Abstract: 

    • Bacteriophages with contractile tails and the bacterial type VI secretion system have been proposed to use a special protein to create an opening in the host cell membrane during infection. These proteins have a modular architecture but invariably contain an oligonucleotide/oligosaccharide-binding (OB-fold) domain and a long β-helical C-terminal domain, which initiates the contact with the host cell membrane ...

    Bacteriophages with contractile tails and the bacterial type VI secretion system have been proposed to use a special protein to create an opening in the host cell membrane during infection. These proteins have a modular architecture but invariably contain an oligonucleotide/oligosaccharide-binding (OB-fold) domain and a long β-helical C-terminal domain, which initiates the contact with the host cell membrane. Using X-ray crystallography and electron microscopy, we report the atomic structure of the membrane-piercing proteins from bacteriophages P2 and ϕ92 and identify the residues that constitute the membrane-attacking apex. Both proteins form compact spikes with a ∼10Å diameter tip that is stabilized by a centrally positioned iron ion bound by six histidine residues. The accumulated data strongly suggest that, in the process of membrane penetration, the spikes are translocated through the lipid bilayer without undergoing major unfolding.

    Organizational Affiliation: 

    Institut de Physique des Systèmes Biologiques, Laboratory of Structural Biology and Biophysics, Ecole Polytechnique Fédérale de Lausanne (EPFL), BSP-415, CH-1015, Lausanne, Switzerland.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Baseplate assembly protein V A, B115Escherichia virus P2Mutation(s): 0 
Gene Names: V
Find proteins for P31340 (Escherichia phage P2)
Explore P31340 
Go to UniProtKB:  P31340
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.94 Å
  • R-Value Free: 0.112 
  • R-Value Work: 0.102 
  • R-Value Observed: 0.102 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 49.069α = 90
b = 49.069β = 90
c = 463.896γ = 120
Software Package:
Software NamePurpose
RemDAqdata collection
SHELXmodel building
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-02-22
    Type: Initial release
  • Version 1.1: 2012-02-29
    Changes: Database references
  • Version 1.2: 2017-11-08
    Changes: Refinement description