Capsid model of M13 bacteriophage virus from Magic-angle spinning NMR and Rosetta modeling

Experimental Data Snapshot

  • Conformers Calculated: 5000 
  • Conformers Submitted: 
  • Selection Criteria: target function 

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This is version 1.4 of the entry. See complete history


The NMR-Rosetta capsid model of M13 bacteriophage reveals a quadrupled hydrophobic packing epitope.

Morag, O.Sgourakis, N.G.Baker, D.Goldbourt, A.

(2015) Proc Natl Acad Sci U S A 112: 971-976

  • DOI: https://doi.org/10.1073/pnas.1415393112
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    Filamentous phage are elongated semiflexible ssDNA viruses that infect bacteria. The M13 phage, belonging to the family inoviridae, has a length of ∼1 μm and a diameter of ∼7 nm. Here we present a structural model for the capsid of intact M13 bacteriophage using Rosetta model building guided by structure restraints obtained from magic-angle spinning solid-state NMR experimental data. The C5 subunit symmetry observed in fiber diffraction studies was enforced during model building. The structure consists of stacked pentamers with largely alpha helical subunits containing an N-terminal type II β-turn; there is a rise of 16.6-16.7 Å and a tilt of 36.1-36.6° between consecutive pentamers. The packing of the subunits is stabilized by a repeating hydrophobic stacking pocket; each subunit participates in four pockets by contributing different hydrophobic residues, which are spread along the subunit sequence. Our study provides, to our knowledge, the first magic-angle spinning NMR structure of an intact filamentous virus capsid and further demonstrates the strength of this technique as a method of choice to study noncrystalline, high-molecular-weight molecular assemblies.

  • Organizational Affiliation

    School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel; and.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Capsid protein G8P50Inovirus M13Mutation(s): 0 
Gene Names: VIII
Membrane Entity: Yes 
Find proteins for P69541 (Enterobacteria phage M13)
Explore P69541 
Go to UniProtKB:  P69541
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69541
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Conformers Calculated: 5000 
  • Conformers Submitted: 
  • Selection Criteria: target function 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-07
    Type: Initial release
  • Version 1.1: 2015-01-14
    Changes: Database references, Structure summary
  • Version 1.2: 2015-01-21
    Changes: Other
  • Version 1.3: 2015-02-04
    Changes: Database references
  • Version 1.4: 2015-02-11
    Changes: Database references