Crystal Structure of 3D7 strain Plasmodium falciparum AMA1

Experimental Data Snapshot

  • Resolution: 1.60 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 

wwPDB Validation   3D Report Full Report

This is version 1.1 of the entry. See complete history


Structure and Dynamics of Apical Membrane Antigen 1 from Plasmodium falciparum FVO.

Lim, S.S.Yang, W.Krishnarjuna, B.Kannan Sivaraman, K.Chandrashekaran, I.R.Kass, I.MacRaild, C.A.Devine, S.M.Debono, C.O.Anders, R.F.Scanlon, M.J.Scammells, P.J.Norton, R.S.McGowan, S.

(2014) Biochemistry 53: 7310-7320

  • DOI: https://doi.org/10.1021/bi5012089
  • Primary Citation of Related Structures:  
    4R19, 4R1A, 4R1B, 4R1C

  • PubMed Abstract: 

    Apical membrane antigen 1 (AMA1) interacts with RON2 to form a protein complex that plays a key role in the invasion of host cells by malaria parasites. Blocking this protein-protein interaction represents a potential route to controlling malaria and related parasitic diseases, but the polymorphic nature of AMA1 has proven to be a major challenge to vaccine-induced antibodies and peptide inhibitors exerting strain-transcending inhibitory effects. Here we present the X-ray crystal structure of AMA1 domains I and II from Plasmodium falciparum strain FVO. We compare our new structure to those of AMA1 from P. falciparum 3D7 and Plasmodium vivax. A combination of normalized B factor analysis and computational methods has been used to investigate the flexibility of the domain I loops and how this correlates with their roles in determining the strain specificity of human antibody responses and inhibitory peptides. We also investigated the domain II loop, a key region involved in inhibitor binding, by comparison of multiple AMA1 crystal structures. Collectively, these results provide valuable insights that should contribute to the design of strain-transcending agents targeting P. falciparum AMA1.

  • Organizational Affiliation

    Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Apical membrane antigen 1, AMA1335Plasmodium falciparum 3D7Mutation(s): 0 
Gene Names: AMA1PF11_0344PF3D7_1133400
Find proteins for Q7KQK5 (Plasmodium falciparum (isolate 3D7))
Explore Q7KQK5 
Go to UniProtKB:  Q7KQK5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7KQK5
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.60 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.183 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.92α = 90
b = 51.416β = 114.3
c = 87.567γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-01-14
    Type: Initial release
  • Version 1.1: 2023-09-20
    Changes: Data collection, Database references, Derived calculations, Refinement description