2LL3

The solution structure of TgMIC4 apple-5 domain


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation   3D Report Full Report


This is version 1.2 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: 16720-16733

  • DOI: https://doi.org/10.1074/jbc.M111.325928
  • Primary Citation of Related Structures:  
    2LL3, 2LL4, 4A5V

  • 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. 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Micronemal protein 482Toxoplasma gondiiMutation(s): 0 
Gene Names: MIC4TgIb.0680
UniProt
Find proteins for Q9XZH7 (Toxoplasma gondii)
Explore Q9XZH7 
Go to UniProtKB:  Q9XZH7
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9XZH7
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 10 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-04
    Type: Initial release
  • Version 1.1: 2012-05-30
    Changes: Database references
  • Version 1.2: 2023-06-14
    Changes: Data collection, Database references, Other