5AAW

Structure of a redesigned cross-reactive antibody to dengue virus with increased in vivo potency


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure-Guided Design of an Anti-Dengue Antibody Directed to a Non-Immunodominant Epitope.

Robinson, L.N.Tharakaraman, K.Rowley, K.J.Costa, V.V.Chan, K.R.Wong, Y.H.Ong, L.C.Tan, H.C.Koch, T.Cain, D.Kirloskar, R.Viswanathan, K.Liew, C.W.Tissire, H.Ramakrishnan, B.Myette, J.R.Babcock, G.J.Sasisekharan, V.Alonso, S.Chen, J.Lescar, J.Shriver, Z.Ooi, E.E.Sasisekharan, R.

(2015) Cell 162: 493

  • DOI: 10.1016/j.cell.2015.06.057
  • Primary Citation of Related Structures:  
    5AAM, 5AAW

  • PubMed Abstract: 
  • Dengue is the most common vector-borne viral disease, causing nearly 400 million infections yearly. Currently there are no approved therapies. Antibody epitopes that elicit weak humoral responses may not be accessible by conventional B cell panning m ...

    Dengue is the most common vector-borne viral disease, causing nearly 400 million infections yearly. Currently there are no approved therapies. Antibody epitopes that elicit weak humoral responses may not be accessible by conventional B cell panning methods. To demonstrate an alternative strategy to generating a therapeutic antibody, we employed a non-immunodominant, but functionally relevant, epitope in domain III of the E protein, and engineered by structure-guided methods an antibody directed to it. The resulting antibody, Ab513, exhibits high-affinity binding to, and broadly neutralizes, multiple genotypes within all four serotypes. To assess therapeutic relevance of Ab513, activity against important human clinical features of dengue was investigated. Ab513 mitigates thrombocytopenia in a humanized mouse model, resolves vascular leakage, reduces viremia to nearly undetectable levels, and protects mice in a maternal transfer model of lethal antibody-mediated enhancement. The results demonstrate that Ab513 may reduce the public health burden from dengue.


    Organizational Affiliation

    Department of Biological Engineering, Koch Institute of Integrative Cancer Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge MA 02139; USA; Infectious Diseases Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology, Singapore. Electronic address: rams@mit.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SCFV513ABDFHK252Mus musculusMutation(s): 0 
Protein Feature View
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
DENGUE SEROTYPE 4 ENVELOPE PROTEIN DOMAIN 3CEGIJL115Dengue virusMutation(s): 0 
Find proteins for Q6YFR6 (Dengue virus 4)
Explore Q6YFR6 
Go to UniProtKB:  Q6YFR6
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.27 Å
  • R-Value Free: 0.263 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.228 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 87.11α = 90
b = 131.67β = 90
c = 176.45γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling
MOLREPphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-30
    Type: Initial release
  • Version 1.1: 2016-04-06
    Changes: Database references