期刊
GENE
卷 543, 期 1, 页码 34-44出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.gene.2014.04.011
关键词
Toxoplasma; DEAD-box RNA helicase; Stress granules; Environmental responses
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) [222969]
- graduate student fellowship from the Ministry of Colleges and Universities, Ontario, Canada.
Toxoplasma gondii is an obligate intracellular protozoan which infects one-third of the human population. Due to its high infection prevalence, Toxoplasma offers an ideal system for the study of host-parasite interaction. Similar to other eukaryotes, Toxoplasma maintains levels and localization of cytoplasmic mRNAs throughout its life cycle as part of a gene regulation network to meet all cellular and biochemical requirements. More recently, it was reported that the presence of cytoplasmic mRNA granules could contribute to the parasite pathogenesis and viability. Here we identified a novel Toxoplasma DEAD-box RNA helicase, referred to as (T)under baroxoplasma (g) under barondii (H) under baromolog (o) under barf (D) under barOZ(I) under bar (TgHoDI), because of its high homology (81%) to Plasmodium DOZI. TgHoDI is the functional ortholog of yeast DHH1, and its function was authenticated by complementation studies in Delta dhhl yeast strain. We demonstrated that TgHoDI is a marker of cytoplasmic RNA stress granules, which assemble when the parasites experience cellular stresses and translational arrest (C) 2014 Elsevier B.V. All rights reserved.
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