4Z0D

Crystal structure of FVO strain Plasmodium falciparum AMA1 in complex with the RON2hp [Phe2038Trp] peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structure-Activity Studies of beta-Hairpin Peptide Inhibitors of the Plasmodium falciparum AMA1-RON2 Interaction.

Wang, G.Drinkwater, N.Drew, D.R.MacRaild, C.A.Chalmers, D.K.Mohanty, B.Lim, S.S.Anders, R.F.Beeson, J.G.Thompson, P.E.McGowan, S.Simpson, J.S.Norton, R.S.Scanlon, M.J.

(2016) J Mol Biol 428: 3986-3998

  • DOI: 10.1016/j.jmb.2016.07.001
  • Primary Citation of Related Structures:  
    4Z0D, 4Z0E, 4Z0F, 4Z09

  • PubMed Abstract: 
  • The interaction between apical membrane antigen 1 (AMA1) and rhoptry neck protein 2 (RON2) plays a key role in the invasion of red blood cells by Plasmodium parasites. Disruption of this critical protein-protein interaction represents a promising avenue for antimalarial drug discovery ...

    The interaction between apical membrane antigen 1 (AMA1) and rhoptry neck protein 2 (RON2) plays a key role in the invasion of red blood cells by Plasmodium parasites. Disruption of this critical protein-protein interaction represents a promising avenue for antimalarial drug discovery. In this work, we exploited a 13-residue β-hairpin based on the C-terminal loop of RON2 to probe a conserved binding site on Plasmodium falciparum AMA1. A series of mutations was synthetically engineered into β-hairpin peptides to establish structure-activity relationships. The best mutations improved the binding affinity of the β-hairpin peptide by ~7-fold for 3D7 AMA1 and ~14-fold for FVO AMA1. We determined the crystal structures of several β-hairpin peptides in complex with AMA1 in order to define the structural features and specific interactions that contribute to improved binding affinity. The same mutations in the longer RON2sp2 peptide (residues 2027-2055 of RON2) increased the binding affinity by >30-fold for 3D7 and FVO AMA1, producing K D values of 2.1nM and 0.4nM, respectively. To our knowledge, this is the most potent strain-transcending peptide reported to date and represents a valuable tool to characterize the AMA1-RON2 interaction.


    Organizational Affiliation

    Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia. Electronic address: martin.scanlon@monash.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Apical membrane antigen 1A335Plasmodium falciparum Vietnam Oak-Knoll (FVO)Mutation(s): 0 
Gene Names: PFFVO_05649
UniProt
Find proteins for A0A024UZE1 (Plasmodium falciparum Vietnam Oak-Knoll)
Explore A0A024UZE1 
Go to UniProtKB:  A0A024UZE1
Protein Feature View
Expand
  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Rhoptry neck protein 2B [auth C]13Plasmodium falciparumMutation(s): 0 
UniProt
Find proteins for Q8IKV6 (Plasmodium falciparum (isolate 3D7))
Explore Q8IKV6 
Go to UniProtKB:  Q8IKV6
Protein Feature View
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.203 
  • R-Value Observed: 0.204 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.952α = 90
b = 72.011β = 90
c = 115.589γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
PHENIXrefinement
Cootmodel building
PDB_EXTRACTdata extraction
MOSFLMdata reduction

Structure Validation

View Full Validation Report




Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia1025150

Revision History  (Full details and data files)

  • Version 1.0: 2016-08-03
    Type: Initial release
  • Version 1.1: 2016-10-19
    Changes: Database references
  • Version 1.2: 2017-09-13
    Changes: Author supporting evidence, Data collection, Database references, Derived calculations
  • Version 1.3: 2020-01-08
    Changes: Author supporting evidence