7DWT

Cryo-EM structure of Dengue virus serotype 1 strain WestPac 74 in complex with human antibody 1C19 Fab at 37 deg C (Class 1 particle)


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Models: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Antibody affinity versus dengue morphology influences neutralization.

Fibriansah, G.Lim, E.X.Y.Marzinek, J.K.Ng, T.S.Tan, J.L.Huber, R.G.Lim, X.N.Chew, V.S.Y.Kostyuchenko, V.A.Shi, J.Anand, G.S.Bond, P.J.Crowe Jr., J.E.Lok, S.M.

(2021) PLoS Pathog 17: e1009331-e1009331

  • DOI: https://doi.org/10.1371/journal.ppat.1009331
  • Primary Citation of Related Structures:  
    7DWT, 7DWU

  • PubMed Abstract: 

    Different strains within a dengue serotype (DENV1-4) can have smooth, or "bumpy" surface morphologies with different antigenic characteristics at average body temperature (37°C). We determined the neutralizing properties of a serotype cross-reactive human monoclonal antibody (HMAb) 1C19 for strains with differing morphologies within the DENV1 and DENV2 serotypes. We mapped the 1C19 epitope to E protein domain II by hydrogen deuterium exchange mass spectrometry, cryoEM and molecular dynamics simulations, revealing that this epitope is likely partially hidden on the virus surface. We showed the antibody has high affinity for binding to recombinant DENV1 E proteins compared to those of DENV2, consistent with its strong neutralizing activities for all DENV1 strains tested regardless of their morphologies. This finding suggests that the antibody could out-compete E-to-E interaction for binding to its epitope. In contrast, for DENV2, HMAb 1C19 can only neutralize when the epitope becomes exposed on the bumpy-surfaced particle. Although HMAb 1C19 is not a suitable therapeutic candidate, this study with HMAb 1C19 shows the importance of choosing a high-affinity antibody that could neutralize diverse dengue virus morphologies for therapeutic purposes.


  • Organizational Affiliation

    Emerging Infectious Diseases, Duke-National University of Singapore Medical School, Singapore, Singapore.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
envelope protein
A, B, C
495dengue virus type 1Mutation(s): 0 
UniProt
Find proteins for P17763 (Dengue virus type 1 (strain Nauru/West Pac/1974))
Explore P17763 
Go to UniProtKB:  P17763
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP17763
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Anti-dengue virus human monoclonal antibody 1C19 Fab heavy chainD [auth H]120Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Anti-dengue virus human monoclonal antibody 1C19 Fab light chainE [auth L]106Homo sapiensMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 19.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONMPSA

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Research Foundation (NRF, Singapore)SingaporeNRF-NRFI2016-01
National Research Foundation (NRF, Singapore)SingaporeNRF2017NRF-CRP001-027
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesU54 AI 057157

Revision History  (Full details and data files)

  • Version 1.0: 2021-02-17
    Type: Initial release
  • Version 1.1: 2021-03-31
    Changes: Database references
  • Version 1.2: 2024-03-27
    Changes: Data collection, Database references, Derived calculations, Refinement description