2BVB image
Entry Detail
PDB ID:
2BVB
Keywords:
Title:
The C-terminal domain from Micronemal Protein 1 (MIC1) from Toxoplasma Gondii
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2005-06-23
Release Date:
2005-10-12
Method Details:
Experimental Method:
Conformers Calculated:
10
Conformers Submitted:
1
Selection Criteria:
structures with the lowest energy
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:MICRONEMAL PROTEIN 1
Chain IDs:A
Chain Length:137
Number of Molecules:1
Biological Source:TOXOPLASMA GONDII
Ligand Molecules
Primary Citation
A Novel Galectin-Like Domain from Toxoplasma Gondll Micronemal Protein 1 Assists the Folding, Assembly,and Transport of a Cell-Adhesion Complex.
J.Biol.Chem. 280 38583 ? (2005)
PMID: 16166092 DOI: 10.1074/JBC.C500365200

Abstact

Immediately prior to invasion Toxoplasma gondii tachyzoites release a large number of micronemal proteins (TgMICs) that participate in host cell attachment and penetration. The TgMIC4-MIC1-MIC6 complex was the first to be identified in T. gondii and has been recently shown to be critical in invasion. This study establishes that the N-terminal thrombospondin type I repeat-like domains (TSR1-like) from TgMIC1 function as an independent adhesin as well as promoting association with TgMIC4. Using the newly solved three-dimensional structure of the C-terminal domain of TgMIC1 we have identified a novel Galectin-like fold that does not possess carbohydrate binding properties and redefines the architecture of TgMIC1. Instead, the TgMIC1 Galectin-like domain interacts and stabilizes TgMIC6, which provides the basis for a highly specific quality control mechanism for successful exit from the early secretory compartments and for subsequent trafficking of the complex to the micronemes.

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Primary Citation of related structures