5KU2

expanded poliovirus in complex with VHH 7A


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.5 of the entry. See complete history

Literature

Cryo-electron Microscopy Structures of Expanded Poliovirus with VHHs Sample the Conformational Repertoire of the Expanded State.

Strauss, M.Schotte, L.Karunatilaka, K.S.Filman, D.J.Hogle, J.M.

(2017) J. Virol. 91: --

  • DOI: 10.1128/JVI.01443-16
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • By using cryo-electron microscopy, expanded 80S-like poliovirus virions (poliovirions) were visualized in complexes with four 80S-specific camelid VHHs (Nanobodies). In all four complexes, the VHHs bind to a site on the top surface of the capsid prot ...

    By using cryo-electron microscopy, expanded 80S-like poliovirus virions (poliovirions) were visualized in complexes with four 80S-specific camelid VHHs (Nanobodies). In all four complexes, the VHHs bind to a site on the top surface of the capsid protein VP3, which is hidden in the native virus. Interestingly, although the four VHHs bind to the same site, the structures of the expanded virus differ in detail in each complex, suggesting that each of the Nanobodies has sampled a range of low-energy structures available to the expanded virion. By stabilizing unique structures of expanded virions, VHH binding permitted a more detailed view of the virus structure than was previously possible, leading to a better understanding of the expansion process that is a critical step in infection. It is now clear which polypeptide chains become disordered and which become rearranged. The higher resolution of these structures also revealed well-ordered conformations for the EF loop of VP2, the GH loop of VP3, and the N-terminal extensions of VP1 and VP2, which, in retrospect, were present in lower-resolution structures but not recognized. These structural observations help to explain preexisting mutational data and provide insights into several other stages of the poliovirus life cycle, including the mechanism of receptor-triggered virus expansion.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, Massachusetts, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VP1
1
209Poliovirus type 1 (strain Mahoney)Mutation(s): 0 
Find proteins for P03300 (Poliovirus type 1 (strain Mahoney))
Go to UniProtKB:  P03300
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
VP2
2
268Poliovirus type 1 (strain Mahoney)Mutation(s): 0 
Find proteins for P03300 (Poliovirus type 1 (strain Mahoney))
Go to UniProtKB:  P03300
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
VP3
3
230Poliovirus type 1 (strain Mahoney)Mutation(s): 0 
Find proteins for P03300 (Poliovirus type 1 (strain Mahoney))
Go to UniProtKB:  P03300
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
VHH 7A
7
125N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 5.3 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
Software Package:
Software NamePurpose
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI020566

Revision History 

  • Version 1.0: 2016-11-02
    Type: Initial release
  • Version 1.1: 2016-11-30
    Type: Database references
  • Version 1.2: 2017-02-01
    Type: Database references, Other
  • Version 1.3: 2017-02-08
    Type: Database references
  • Version 1.4: 2017-09-27
    Type: Author supporting evidence, Data collection
  • Version 1.5: 2018-07-18
    Type: Data collection, Experimental preparation