1FR5

PHAGE FR CAPSIDS WITH A FOUR RESIDUE DELETION IN THE COAT PROTEIN FG LOOP

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Work: 0.256 

wwPDB Validation 3D Report Full Report


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

Literature

Structure of phage fr capsids with a deletion in the FG loop: implications for viral assembly.

Axblom, C., Tars, K., Fridborg, K., Orna, L., Bundule, M., Liljas, L.

(1998) Virology 249: 80-88

  • DOI: 10.1006/viro.1998.9279

  • PubMed Abstract: 

    • The loop between beta-strands F and G in the coat protein of small RNA bacteriophages forms the interactions at the fivefold and threefold (quasi-sixfold) icosahedral axes. In many cases, mutations in this region renders the coat protein unable to fo ...

    The loop between beta-strands F and G in the coat protein of small RNA bacteriophages forms the interactions at the fivefold and threefold (quasi-sixfold) icosahedral axes. In many cases, mutations in this region renders the coat protein unable to form capsids. This FG loop has therefore been suggested to be of major importance for the virus assembly process by guiding the assembly and helping to define the correct curvature of the virus shell. We have determined the crystal structure of a phage fr capsid where the coat protein has a four-residue deletion in the FG loop. This mutant retains the ability to form virus capsids of normal size but has a significantly lower temperature stability than the wild type. The structure reveals that the mutated loops are flexible and too short to interact with each other. This seems incompatible with a role of the FG loop in the regulation of capsid size.

    Related Citations: 
    • Crystal Structure of Bacteriophage Fr Capsids at 3.5 A Resolution
      Liljas, L.,Fridborg, K.,Valegard, K.,Bundule, M.,Pumpens, P.
      (1994) J.Mol.Biol. 244: 279

    Organizational Affiliation: 

    Department of Molecular Biology, Uppsala University, Uppsala, S-751 24, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BACTERIOPHAGE FR CAPSID
A, B, C
125Enterobacteria phage frMutation(s): 0 
Find proteins for P03614 (Enterobacteria phage fr)
Go to UniProtKB:  P03614
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Work: 0.256 
  • Space Group: H 3 2
Unit Cell:
Length (Å)Angle (°)
a = 264.100α = 90.00
b = 264.100β = 90.00
c = 654.200γ = 120.00
Software Package:
Software NamePurpose
X-PLORphasing
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-01-13
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance