2K2S

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


Experimental Data Snapshot

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

  • 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 protei ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Micronemal protein 1
A
136Toxoplasma gondiiMutation(s): 0 
Gene Names: MIC1
Find proteins for O00834 (Toxoplasma gondii)
Go to UniProtKB:  O00834
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Micronemal protein 6
B
61Toxoplasma gondiiMutation(s): 0 
Gene Names: MIC6
Find proteins for Q9XYH7 (Toxoplasma gondii)
Go to UniProtKB:  Q9XYH7
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 40 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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