2W4Y

Caulobacter bacteriophage 5 - virus-like particle


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Work: 0.278 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The Structure of Bacteriophage Phicb5 Reveals a Role of the RNA Genome and Metal Ions in Particle Stability and Assembly.

Plevka, P.Kazaks, A.Voronkova, T.Kotelovica, S.Dishlers, A.Liljas, L.Tars, K.

(2009) J.Mol.Biol. 391: 635

  • DOI: 10.1016/j.jmb.2009.06.047
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The structure of the Leviviridae bacteriophage phiCb5 virus-like particle has been determined at 2.9 A resolution and the structure of the native bacteriophage phiCb5 at 3.6 A. The structures of the coat protein shell appear to be identical, while di ...

    The structure of the Leviviridae bacteriophage phiCb5 virus-like particle has been determined at 2.9 A resolution and the structure of the native bacteriophage phiCb5 at 3.6 A. The structures of the coat protein shell appear to be identical, while differences are found in the organization of the density corresponding to the RNA. The capsid is built of coat protein dimers and in shape corresponds to a truncated icosahedron with T = 3 quasi-symmetry. The capsid is stabilized by four calcium ions per icosahedral asymmetric unit. One is located at the symmetry axis relating the quasi-3-fold related subunits and is part of an elaborate network of hydrogen bonds stabilizing the interface. The remaining calcium ions stabilize the contacts within the coat protein dimer. The stability of the phiCb5 particles decreases when calcium ions are chelated with EDTA. In contrast to other leviviruses, phiCb5 particles are destabilized in solution with elevated salt concentration. The model of the phiCb5 capsid provides an explanation of the salt-induced destabilization of phiCb5, since hydrogen bonds, salt bridges and calcium ions have important roles in the intersubunit interactions. Electron density of three putative RNA nucleotides per icosahedral asymmetric unit has been observed in the phiCb5 structure. The nucleotides mediate contacts between the two subunits forming a dimer and a third subunit in another dimer. We suggest a model for phiCb5 capsid assembly in which addition of coat protein dimers to the forming capsid is facilitated by interaction with the RNA genome. The phiCb5 structure is the first example in the levivirus family that provides insight into the mechanism by which the genome-coat protein interaction may accelerate the capsid assembly and increase capsid stability.


    Organizational Affiliation

    (1)Department of Cell and Molecular Biology, Uppsala University, SE-751 24 Uppsala, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CAULOBACTER 5 VIRUS-LIKE PARTICLE
A, B, C
122N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B, C
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
AMP
Query on AMP

Download SDF File 
Download CCD File 
A, B
ADENOSINE MONOPHOSPHATE
C10 H14 N5 O7 P
UDMBCSSLTHHNCD-KQYNXXCUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Work: 0.278 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 406.400α = 90.00
b = 342.600β = 93.19
c = 409.700γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data reduction
CNSrefinement
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2009-07-14
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance