2K2S

structure of the MIC1-GLD/MIC6-EGF complex from Toxoplasma gondii

Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 1 
  • 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

Structural insights into microneme protein assembly reveal a new mode of EGF domain recognition

Sawmynaden, K., Saouros, S., Friedrich, N., Marchant, J., Simpson, P., Bleijlevens, B., Blackman, M.J., Soldati-Favre, D., Matthews, S.

(2008) EMBO Rep 9: 1149-1155

  • DOI: 10.1038/embor.2008.179
  • Primary Citation of Related Structures:  
    2K2T, 2K2S

  • PubMed Abstract: 

    • The obligate intracellular parasite Toxoplasma gondii, a member of the phylum Apicomplexa that includes Plasmodium spp., is one of the most widespread parasites and the causative agent of toxoplasmosis. Adhesive complexes composed of microneme proteins (MICs) are secreted onto the parasite surface from intracellular stores and fulfil crucial roles in host-cell recognition, attachment and penetration ...

    The obligate intracellular parasite Toxoplasma gondii, a member of the phylum Apicomplexa that includes Plasmodium spp., is one of the most widespread parasites and the causative agent of toxoplasmosis. Adhesive complexes composed of microneme proteins (MICs) are secreted onto the parasite surface from intracellular stores and fulfil crucial roles in host-cell recognition, attachment and penetration. Here, we report the high-resolution solution structure of a complex between two crucial MICs, TgMIC6 and TgMIC1. Furthermore, we identify two analogous interaction sites within separate epidermal growth factor-like (EGF) domains of TgMIC6-EGF2 and EGF3-and confirm that both interactions are functional for the recognition of host cell receptor in the parasite, using immunofluorescence and invasion assays. The nature of this new mode of recognition of the EGF domain and its abundance in apicomplexan surface proteins suggest a more generalized means of constructing functional assemblies by using EGF domains with highly specific receptor-binding properties.

    Organizational Affiliation: 

    Division of Molecular Biosciences, Imperial College London, Exhibition Road, South Kensington Campus, London SW7 2AZ, UK.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Micronemal protein 1 A136Toxoplasma gondiiMutation(s): 0 
Gene Names: MIC1
Find proteins for O00834 (Toxoplasma gondii)
Explore O00834 
Go to UniProtKB:  O00834
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Micronemal protein 6 B61Toxoplasma gondiiMutation(s): 0 
Gene Names: MIC6
Find proteins for Q9XYH7 (Toxoplasma gondii)
Explore Q9XYH7 
Go to UniProtKB:  Q9XYH7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 1 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 2K2S Olderado

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2008-04-11 
  • Released Date: 2009-02-24 
    • Deposition Author(s): Matthews, S.

Revision History  (Full details and data files)

  • Version 1.0: 2009-02-24
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2011-07-27
    Changes: Refinement description