2bvb
From Proteopedia
THE C-TERMINAL DOMAIN FROM MICRONEMAL PROTEIN 1 (MIC1) FROM TOXOPLASMA GONDII
Structural highlights
Function[MIC1_TOXGO] Adhesin. Required for attachment of the parasite to the host cell prior to invasion. Ensures correct folding of MIC6 and transport of the MIC6-MIC1-MIC4 complex into the micronemes.[1] [2] [3] [4] [5] Publication Abstract from PubMedImmediately 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. A novel galectin-like domain from Toxoplasma gondii micronemal protein 1 assists the folding, assembly, and transport of a cell adhesion complex.,Saouros S, Edwards-Jones B, Reiss M, Sawmynaden K, Cota E, Simpson P, Dowse TJ, Jakle U, Ramboarina S, Shivarattan T, Matthews S, Soldati-Favre D J Biol Chem. 2005 Nov 18;280(46):38583-91. Epub 2005 Sep 15. PMID:16166092[6] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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Categories: Toxgo | Cota, E | Dowse, T J | Edwards-Jones, B | Jakle, U | Matthews, S | Ramboarina, S | Reiss, M | Saouros, S | Sawmynaden, K | Shivarattan, T | Simpson, P | Soldati-Favre, D | Adhesion | Invasion | Mic1 | Microneme
