1IFP

INOVIRUS (FILAMENTOUS BACTERIOPHAGE) STRAIN PF3 MAJOR COAT PROTEIN ASSEMBLY


Experimental Data Snapshot

ERROR: Experimental Data Snapshots data not found.

wwPDB Validation

Currently 1IFP does not have a wwPDB validation report.


This is version 1.2 of the entry. See complete history

Literature

Structure of the capsid of Pf3 filamentous phage determined from X-ray fibre diffraction data at 3.1 A resolution.

Welsh, L.C.Symmons, M.F.Sturtevant, J.M.Marvin, D.A.Perham, R.N.

(1998) J.Mol.Biol. 283: 155-177

  • DOI: 10.1006/jmbi.1998.2081
  • Also Cited By: 1HGV, 1HGZ, 1HH0

  • PubMed Abstract: 
  • We have recorded X-ray diffraction patterns at 3.1 A resolution from magnetically aligned fibres of the Pf3 strain of filamentous bacteriophage (Inovirus). The patterns are similar to patterns from the higher-temperature form of the Pf1 strain, indic ...

    We have recorded X-ray diffraction patterns at 3.1 A resolution from magnetically aligned fibres of the Pf3 strain of filamentous bacteriophage (Inovirus). The patterns are similar to patterns from the higher-temperature form of the Pf1 strain, indicating that the Pf3 and Pf1 virions have the same helix symmetry and similar protein subunit shape. This is of particular interest, given that the primary structures of the two protein subunits are quite different; and the nucleotide/protein subunit ratio in the Pf3 virion is more than twice that in Pf1, indicating important differences in DNA packaging. We have built a molecular model of the Pf3 protein capsid based on the model of Pf1, and refined it against the diffraction data using simulated annealing. The refinement confirms that the two structures are similar, which may reflect a fundamental motif of alpha-helix packing. However, there are some differences between the structures: the Pf3 subunit appears to be completely alpha-helical, beginning at the N terminus, whereas the first few residues of the Pf1 subunit are not helical; and the structure of the C-terminal region of the Pf3 subunit at the inner surface of the tubular capsid indicates that DNA/protein interactions in this virion may involve both aromatic side-chains and positively charged side-chains, whereas those in the Pf1 virion involve predominantly only the latter. In the course of this work, we have developed new approaches to refinement and validation of helical structures with respect to continuous transform fibre diffraction data.


    Related Citations: 
    • Pf1 Filamentous Bacteriophage: Refinement of a Molecular Model by Simulated Annealing Using 3.3 A Resolution X-Ray Fibre Diffraction Data
      Gonzalez, A.,Nave, C.,Marvin, D.A.
      (1995) Acta Crystallogr.,Sect.D 51: 792
    • Erratum. Model-Building Studies of Inovirus: Genetic Variations on a Geometric Theme
      Marvin, D.A.
      (1990) Int.J.Biol.Macromol. 12: 335
    • Model-Building Studies of Inovirus: Genetic Variations on a Geometric Theme
      Marvin, D.A.
      (1990) Int.J.Biol.Macromol. 12: 125
    • Two Forms of Pf1 Inovirus: X-Ray Diffraction Studies on a Structural Phase Transition and a Calculated Libration Normal Mode of the Asymmetric Unit
      Marvin, D.A.,Nave, C.,Bansal, M.,Hale, R.D.,Salje, E.K.H.
      (1992) Phase Transitions 39: 45
    • Dynamics of Telescoping Inovirus: A Mechanism for Assembly at Membrane Adhesions
      Marvin, D.A.
      (1989) Int.J.Biol.Macromol. 11: 159


    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, 80 Tennis Court Road, Cambridge, CB2 1GA, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MAJOR COAT PROTEIN ASSEMBLY
A
44Pseudomonas phage Pf3Gene Names: VIII
Find proteins for P03623 (Pseudomonas phage Pf3)
Go to UniProtKB:  P03623
Experimental Data & Validation

Experimental Data

ERROR: Experimental Data Snapshots data not found.
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORrefinement
CCP13-FDSCALEdata scaling
CCP13data reduction
X-PLORmodel building

Structure Validation

Currently 1IFP does not have a wwPDB validation report.



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-11-04
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance