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Toxoplasma as a novel system for motility.
Dominique Soldati1, Markus Meissner
1Department of Biological Sciences, Imperial College London, Sir Alexander Fleming Building, South Kensington Campus, London UK, SW7 2AZ. d.soldati@ic.ac.uk
Current Opinion in Cell Biology
|March 24, 2004
Summary
Apicomplexan parasites like Toxoplasma gondii use unique gliding motility for movement and invasion. This process relies on actin dynamics and specific myosin proteins, crucial for parasite survival and infectivity.
Area of Science:
- Cellular Biology
- Parasitology
- Biophysics
Background:
- Most organisms use cilia or flagella for motility.
- Amoeboid movement involves actin polymerization and cell deformation.
- Apicomplexan parasites exhibit unique gliding motility despite lacking typical locomotive structures.
Purpose of the Study:
- To elucidate the mechanism of gliding motility in apicomplexan parasites.
- To understand the role of actin dynamics and specific proteins in parasite locomotion.
- To highlight the importance of gliding motility for parasite infectivity and disease causation.
Main Methods:
- Detailed studies in model organisms like *Toxoplasma gondii* and *Plasmodium* species.
- Investigation of actin dynamics during parasite movement.
- Analysis of the involvement of myosin of class XIV and adhesive proteins.
Main Results:
- Gliding motility is essential for apicomplexan parasite migration across biological barriers.
- This movement is dependent on a class XIV myosin.
- Actin dynamics and the processing of adhesive proteins are necessary for gliding.
Conclusions:
- Apicomplexan parasites utilize a unique myosin-driven gliding motility.
- Gliding is indispensable for host-cell invasion, egress, and parasite survival.
- Understanding gliding motility is key to combating diseases caused by these obligate intracellular parasites.