Importance of enolase in Giardia lamblia differentiation.

Molecular and Biochemical Parasitology
Araceli Castillo-RomeroFrances D Gillin

Abstract

The ability of Giardia to differentiate into cysts which survive in the environment and release the virulent trophozoites after ingestion in the small intestine is essential for transmission and disease. We examined the role of enolase, a glycolytic enzyme, in Giardia differentiation. The sequence of Giardia lamblia enolase (gEno) is most similar to enolases in Homo sapiens and Leishmania mexicana, and shows the conserved catalytic and metal-binding residues. We used an integration vector to stably express wild type and mutant gEno. In trophozoites, wild type gEno localized to the cell membrane, caudal flagella and cytosol. gEno is present on the wall of mature cysts, but not in encystation secretory vesicles (ESV). The expression of gEno with a deletion of residues G167-K169, or mutations H389Q/R390S significantly inhibited excystation while mutation of residue D257K had no effect. These results suggest a role for enolase in regulation of Giardia excystation.

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Citations

Jan 7, 2014·PloS One·Carmen FasoAdrian B Hehl
Aug 6, 2014·Metabolites·Jürgen E W PolleEliza M Wiech
Jun 16, 2015·Parasite Immunology·G Lopez-RomeroC Velazquez
Jul 31, 2013·Experimental Parasitology·Juri KimSoon-Jung Park
Aug 5, 2017·Molecular BioSystems·R Aguayo-OrtizL Yépez-Mulia
Jun 2, 2017·Parasites & Vectors·Rongsheng MiZhaoguo Chen
Apr 10, 2019·Infection and Immunity·Barbara J DavidsLars Eckmann
Jun 4, 2018·Parasitology Research·Samira Muñoz-CruzLilián Yépez-Mulia

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