3J42

Obstruction of Dengue Virus Maturation by Fab Fragments of the 2H2 Antibody


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 21 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Obstruction of Dengue Virus Maturation by Fab Fragments of the 2H2 Antibody.

Wang, Z.Li, L.Pennington, J.G.Sheng, J.Yap, M.L.Plevka, P.Meng, G.Sun, L.Jiang, W.Rossmann, M.G.

(2013) J.Virol. 87: 8909-8915

  • DOI: 10.1128/JVI.00472-13
  • Primary Citation of Related Structures:  4KVC

  • PubMed Abstract: 
  • The 2H2 monoclonal antibody recognizes the precursor peptide on immature dengue virus and might therefore be a useful tool for investigating the conformational change that occurs when the immature virus enters an acidic environment. During dengue vir ...

    The 2H2 monoclonal antibody recognizes the precursor peptide on immature dengue virus and might therefore be a useful tool for investigating the conformational change that occurs when the immature virus enters an acidic environment. During dengue virus maturation, spiky, immature, noninfectious virions change their structure to form smooth-surfaced particles in the slightly acidic environment of the trans-Golgi network, thereby allowing cellular furin to cleave the precursor-membrane proteins. The dengue virions become fully infectious when they release the cleaved precursor peptide upon reaching the neutral-pH environment of the extracellular space. Here we report on the cryo-electron microscopy structures of the immature virus complexed with the 2H2 antigen binding fragments (Fab) at different concentrations and under various pH conditions. At neutral pH and a high concentration of Fab molecules, three Fab molecules bind to three precursor-membrane proteins on each spike of the immature virus. However, at a low concentration of Fab molecules and pH 7.0, only two Fab molecules bind to each spike. Changing to a slightly acidic pH caused no detectable change of structure for the sample with a high Fab concentration but caused severe structural damage to the low-concentration sample. Therefore, the 2H2 Fab inhibits the maturation process of immature dengue virus when Fab molecules are present at a high concentration, because the three Fab molecules on each spike hold the precursor-membrane molecules together, thereby inhibiting the normal conformational change that occurs during maturation.


    Organizational Affiliation

    Department of Biological Sciences, Purdue University, West Lafayette, Indiana, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Envelope protein E
A, B, C
390Dengue virus 2N/A
Find proteins for O11875 (Dengue virus 2)
Go to UniProtKB:  O11875
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
PrM
D, E, F
81Dengue virus 2N/A
Find proteins for Q3BCY5 (Dengue virus 2)
Go to UniProtKB:  Q3BCY5
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
Ig heavy chain V region MOPC 21, Igh protein chimera
G, I, K
221Mus musculusGene Names: Igh,
Find proteins for Q6PIP8 (Mus musculus)
Go to UniProtKB:  Q6PIP8
Find proteins for P01783 (Mus musculus)
Go to UniProtKB:  P01783
Entity ID: 4
MoleculeChainsSequence LengthOrganismDetails
Ig kappa chain V-V region MOPC 21, Anti-colorectal carcinoma light chain chimera
H, J, L
212Mus musculusN/A
Find proteins for Q7TS98 (Mus musculus)
Go to UniProtKB:  Q7TS98
Find proteins for P01634 (Mus musculus)
Go to UniProtKB:  P01634
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 21 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-08-14
    Type: Database references