4F1J

Crystal structure of the MG2+ loaded VWA domain of plasmodium falciparum trap protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of Plasmodium falciparum TRAP (thrombospondin-related anonymous protein) A domain highlights distinct features in apicomplexan von Willebrand factor A homologues.

Pihlajamaa, T.Kajander, T.Knuuti, J.Horkka, K.Sharma, A.Permi, P.

(2013) Biochem.J. 450: 469-476

  • DOI: 10.1042/BJ20121058
  • Primary Citation of Related Structures:  4F1K

  • PubMed Abstract: 
  • TRAP (thrombospondin-related anonymous protein), localized in the micronemes and on the surface of sporozoites of the notorious malaria parasite Plasmodium, is a key molecule upon infection of mammalian host hepatocytes and invasion of mosquito saliv ...

    TRAP (thrombospondin-related anonymous protein), localized in the micronemes and on the surface of sporozoites of the notorious malaria parasite Plasmodium, is a key molecule upon infection of mammalian host hepatocytes and invasion of mosquito salivary glands. TRAP contains two adhesive domains responsible for host cell recognition and invasion, and is known to be essential for infectivity. In the present paper, we report high-resolution crystal structures of the A domain of Plasmodium falciparum TRAP with and without bound Mg2+. The structure reveals a vWA (von Willebrand factor A)-like fold and a functional MIDAS (metal-ion-dependent adhesion site), as well as a potential heparan sulfate-binding site. Site-directed mutagenesis and cell-attachment assays were used to investigate the functional roles of the surface epitopes discovered. The reported structures are the first determined for a complete vWA domain of parasitic origin, highlighting unique features among homologous domains from other proteins characterized hitherto. Some of these are conserved among Plasmodiae exclusively, whereas others may be common to apicomplexan organisms in general.


    Organizational Affiliation

    Program in Structural Biology and Biophysics, Institute of Biotechnology, P.O. Box 65, FI-00014 University of Helsinki, Helsinki, Finland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Thrombospondin related anonymous protein
A, B
203Plasmodium falciparumGene Names: TRAP
Find proteins for Q01502 (Plasmodium falciparum)
Go to UniProtKB:  Q01502
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
CL
Query on CL

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Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A, B
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

Download SDF File 
Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.73 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.177 
  • Space Group: P 43 21 2
Unit Cell:
Length (Å)Angle (°)
a = 89.313α = 90.00
b = 89.313β = 90.00
c = 104.192γ = 90.00
Software Package:
Software NamePurpose
MAR345dtbdata collection
XDSdata reduction
XDSdata scaling
SHARPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-30
    Type: Initial release
  • Version 1.1: 2013-05-22
    Type: Database references