4A5V

Solution structure ensemble of the two N-terminal apple domains (residues 58-231) of Toxoplasma gondii microneme protein 4


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 10 
  • Selection Criteria: LOWEST ENERGY 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Galactose Recognition by the Apicomplexan Parasite Toxoplasma Gondii.

Marchant, J.Cowper, B.Liu, Y.Lai, L.Pinzan, C.Marq, J.B.Friedrich, N.Sawmynaden, K.Liew, L.Chai, W.Childs, R.A.Saouros, S.Simpson, P.Roque Barreira, M.C.Feizi, T.Soldati-Favre, D.Matthews, S.

(2012) J.Biol.Chem. 287: 16720

  • DOI: 10.1074/jbc.M111.325928
  • Primary Citation of Related Structures:  2LL3, 2LL4

  • PubMed Abstract: 
  • Toxosplasma gondii is the model parasite of the phylum Apicomplexa, which contains numerous obligate intracellular parasites of medical and veterinary importance, including Eimeria, Sarcocystis, Cryptosporidium, Cyclospora, and Plasmodium species. Me ...

    Toxosplasma gondii is the model parasite of the phylum Apicomplexa, which contains numerous obligate intracellular parasites of medical and veterinary importance, including Eimeria, Sarcocystis, Cryptosporidium, Cyclospora, and Plasmodium species. Members of this phylum actively enter host cells by a multistep process with the help of microneme protein (MIC) complexes that play important roles in motility, host cell attachment, moving junction formation, and invasion. T. gondii (Tg)MIC1-4-6 complex is the most extensively investigated microneme complex, which contributes to host cell recognition and attachment via the action of TgMIC1, a sialic acid-binding adhesin. Here, we report the structure of TgMIC4 and reveal its carbohydrate-binding specificity to a variety of galactose-containing carbohydrate ligands. The lectin is composed of six apple domains in which the fifth domain displays a potent galactose-binding activity, and which is cleaved from the complex during parasite invasion. We propose that galactose recognition by TgMIC4 may compromise host protection from galectin-mediated activation of the host immune system.


    Organizational Affiliation

    Division of Molecular Biosciences, Imperial College London, South Kensington Campus, London SW7 2AZ, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
MICRONEMAL PROTEIN 4
A
161Toxoplasma gondiiGene Names: MIC4
Find proteins for Q9XZH7 (Toxoplasma gondii)
Go to UniProtKB:  Q9XZH7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 10 
  • Selection Criteria: LOWEST ENERGY 
  • Olderado: 4A5V Olderado

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-05-23
    Type: Other