6D04

Cryo-EM structure of a Plasmodium vivax invasion complex essential for entry into human reticulocytes; two molecules of parasite ligand, subclass 1.

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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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
  • Primary Citation of Related Structures:  
    6D03, 6D05, 6D04, 6BPA, 6BPC, 6BPB, 6BPE, 6BPD

  • 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
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Transferrin receptor protein 1A, B659Homo sapiensMutation(s): 1 
Gene Names: TFRC
Find proteins for P02786 (Homo sapiens)
Explore P02786 
Go to UniProtKB:  P02786
NIH Common Fund Data Resources
PHAROS  P02786
GTEx  ENSG00000072274
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SerotransferrinC, D698Homo sapiensMutation(s): 1 
Gene Names: TF, PRO1400
Find proteins for P02787 (Homo sapiens)
Explore P02787 
Go to UniProtKB:  P02787
NIH Common Fund Data Resources
PHAROS  P02787
GTEx  ENSG00000091513
Protein Feature View
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  • Reference Sequence
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(by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Reticulocyte binding protein 2, putativeE, F820Plasmodium vivax Sal-1Mutation(s): 1 
Gene Names: PVX_094255
Find proteins for A5K736 (Plasmodium vivax (strain Salvador I))
Explore A5K736 
Go to UniProtKB:  A5K736
Protein Feature View
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  • Reference Sequence
Oligosaccharides

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Entity ID: 4
MoleculeChainsChain Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
G, H, I, J, K, L
2 N-Glycosylation Oligosaccharides Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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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 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary