6BPB

Plasmodium vivax invasion blocking monoclonal antibody 4F7


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Cryo-EM structure of an essential Plasmodium vivax invasion complex.

Gruszczyk, J.Huang, R.K.Chan, L.J.Menant, S.Hong, C.Murphy, J.M.Mok, Y.F.Griffin, M.D.W.Pearson, R.D.Wong, W.Cowman, A.F.Yu, Z.Tham, W.H.

(2018) Nature 559: 135-139

  • DOI: 10.1038/s41586-018-0249-1
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Plasmodium vivax is the most widely distributed malaria parasite that infects humans 1 . P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. vivax reticulocyte-binding protein 2b ...

    Plasmodium vivax is the most widely distributed malaria parasite that infects humans 1 . P. vivax invades reticulocytes exclusively, and successful entry depends on specific interactions between the P. vivax reticulocyte-binding protein 2b (PvRBP2b) and transferrin receptor 1 (TfR1) 2 . TfR1-deficient erythroid cells are refractory to invasion by P. vivax, and anti-PvRBP2b monoclonal antibodies inhibit reticulocyte binding and block P. vivax invasion in field isolates 2 . Here we report a high-resolution cryo-electron microscopy structure of a ternary complex of PvRBP2b bound to human TfR1 and transferrin, at 3.7 Å resolution. Mutational analyses show that PvRBP2b residues involved in complex formation are conserved; this suggests that antigens could be designed that act across P. vivax strains. Functional analyses of TfR1 highlight how P. vivax hijacks TfR1, an essential housekeeping protein, by binding to sites that govern host specificity, without affecting its cellular function of transporting iron. Crystal and solution structures of PvRBP2b in complex with antibody fragments characterize the inhibitory epitopes. Our results establish a structural framework for understanding how P. vivax reticulocyte-binding protein engages its receptor and the molecular mechanism of inhibitory monoclonal antibodies, providing important information for the design of novel vaccine candidates.


    Organizational Affiliation

    Department of Medical Biology, The University of Melbourne, Melbourne, Victoria, Australia. tham@wehi.edu.au.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Monoclonal antibody 4F7 Fab heavy chainA254Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence

Find similar proteins by: Sequence  |  Structure

Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Monoclonal antibody 4F7 Fab light chainB237Mus musculusMutation(s): 0 
Protein Feature View
 ( Mouse scroll to zoom / Hold left click to move )
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.219 
  • R-Value Work: 0.206 
  • R-Value Observed: 0.206 
  • Space Group: P 2 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 40.72α = 90
b = 63.34β = 90
c = 182.64γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
iMOSFLMdata reduction
Aimlessdata scaling
PHENIXphasing
PHENIXmodel building
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2018-06-20
    Type: Initial release
  • Version 1.1: 2018-06-27
    Changes: Data collection, Database references
  • Version 1.2: 2018-07-11
    Changes: Data collection, Database references
  • Version 1.3: 2018-07-18
    Changes: Data collection, Database references