کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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5915520 | 1163306 | 2012 | 8 صفحه PDF | دانلود رایگان |
Autophagy, an evolutionarily conserved protein degradation pathway in eukaryotes, plays essential roles during starvation and cellular differentiation by eliminating unwanted and/or unnecessary cell material including organelles. Autophagy protein 16 (Atg16) is an essential component of the autophagic machinery. The present study identified and characterized an Atg16 homologue (AcAtg16) in Acanthamoeba, an opportunistic pathogen responsible for several distinct diseases in humans. AcAtg16 was highly expressed during encystation and was found to be associated with small or large vesicular structures that partially colocalized with autophagolysosomes. Small interfering RNA against AcAtg16 inhibited autophagosome formation and reduced the encystation efficiency of Acanthamoeba. Moreover, most mitochondria remained undigested in these knockdown cells. Taken together, these results indicate that AcAtg16 is involved in autophagosome formation and plays an essential role in the encystation of Acanthamoeba.
Acanthamoeba possesses not only the Atg8-PE conjugation system but also the Atg12-Atg5-Atg16 conjugation system for autophagy, which are both essential for the encystation of Acanthamoeba.135Highlights⺠We identified Autophagy protein 16 (Atg16) as an essential component of the autophagic machinery in Acanthamoeba. ⺠AcAtg16 is highly expressed during encystation. ⺠AcAtg16 is involved in autophagosome formation in the encystation of Acanthamoeba.
Journal: Molecular and Biochemical Parasitology - Volume 183, Issue 2, June 2012, Pages 158-165