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- W1899014775 abstract "Vacuolar autophagy is a major pathway by which eukaryotic cells degrade macromolecules, either to remove damaged or unnecessary proteins, or to produce respiratory substrates and raw materials to survive periods of nutrient deficiency. During autophagy, a double membrane forms around cytoplasmic components to generate an autophagosome, which is transported to the vacuole. The outer membrane fuses with the vacuole or lysosome, and the inner membrane and its contents are degraded by vacuolar or lysosomal hydrolases. We have identified a small gene family in Arabidopsis thaliana, members of which show sequence similarity to the yeast autophagy gene ATG18. Members of the AtATG18 gene family are differentially expressed in response to different growth conditions, and one member of this family, AtATG18a, is induced both during sucrose and nitrogen starvation and during senescence. RNA interference was used to generate transgenic lines with reduced AtATG18a expression. These lines show hypersensitivity to sucrose and nitrogen starvation and premature senescence, both during natural senescence of leaves and in a detached leaf assay. Staining with the autophagosome-specific fluorescent dye monodansylcadaverine revealed that, unlike wild-type plants, AtATG18a RNA interference plants are unable to produce autophagosomes in response to starvation or senescence conditions. We conclude that the AtATG18a protein is likely to be required for autophagosome formation in Arabidopsis." @default.
- W1899014775 created "2016-06-24" @default.
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- W1899014775 date "2005-04-01" @default.
- W1899014775 modified "2023-10-14" @default.
- W1899014775 title "AtATG18a is required for the formation of autophagosomes during nutrient stress and senescence in Arabidopsis thaliana" @default.
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- W1899014775 doi "https://doi.org/10.1111/j.1365-313x.2005.02397.x" @default.
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