3IZG

Bacteriophage T7 prohead shell EM-derived atomic model


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Molecular rearrangements involved in the capsid shell maturation of bacteriophage T7.

Ionel, A.Velazquez-Muriel, J.A.Luque, D.Cuervo, A.Caston, J.R.Valpuesta, J.M.Martin-Benito, J.Carrascosa, J.L.

(2011) J Biol Chem 286: 234-242

  • DOI: https://doi.org/10.1074/jbc.M110.187211
  • Primary Citation of Related Structures:  
    2XVR, 3IZG

  • PubMed Abstract: 

    Maturation of dsDNA bacteriophages involves assembling the virus prohead from a limited set of structural components followed by rearrangements required for the stability that is necessary for infecting a host under challenging environmental conditions. Here, we determine the mature capsid structure of T7 at 1 nm resolution by cryo-electron microscopy and compare it with the prohead to reveal the molecular basis of T7 shell maturation. The mature capsid presents an expanded and thinner shell, with a drastic rearrangement of the major protein monomers that increases in their interacting surfaces, in turn resulting in a new bonding lattice. The rearrangements include tilting, in-plane rotation, and radial expansion of the subunits, as well as a relative bending of the A- and P-domains of each subunit. The unique features of this shell transformation, which does not employ the accessory proteins, inserted domains, or molecular interactions observed in other phages, suggest a simple capsid assembling strategy that may have appeared early in the evolution of these viruses.


  • Organizational Affiliation

    Department of Macromolecular Structure, Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Darwin 3, Cantoblanco, 28049 Madrid, Spain.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Major capsid protein 10A345Escherichia phage T7Mutation(s): 0 
UniProt
Find proteins for P19726 (Escherichia phage T7)
Explore P19726 
Go to UniProtKB:  P19726
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP19726
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.9 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONSPIDER

Structure Validation

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Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2010-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-07-18
    Changes: Data collection
  • Version 1.3: 2019-11-06
    Changes: Data collection, Other
  • Version 1.4: 2024-02-21
    Changes: Data collection, Database references, Derived calculations, Refinement description