Uba1 functions in Atg7- and Atg3-independent autophagy
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Author
Chang, Tsun-Kai
Shravage, Bhupendra V.
Hayes, Sebastian D.
Powers, Christine M.
Simin, Rachel T.
Harper, J. Wade
Baehrecke, Eric H.
Published Version
https://doi.org/10.1038/ncb2804Metadata
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Chang, Tsun-Kai, Bhupendra V. Shravage, Sebastian D. Hayes, Christine M. Powers, Rachel T. Simin, J. Wade Harper, and Eric H. Baehrecke. 2013. “Uba1 functions in Atg7- and Atg3-independent autophagy.” Nature cell biology 15 (9): 1067-1078. doi:10.1038/ncb2804. http://dx.doi.org/10.1038/ncb2804.Abstract
Autophagy is a conserved process that delivers components of the cytoplasm to lysosomes for degradation. The E1 and E2 enzymes encoded by Atg7 and Atg3 are thought to be essential for autophagy involving the ubiquitin-like protein Atg8. Here, we describe an Atg7- and Atg3-independent autophagy pathway that facilitates programmed reduction of cell size during intestine cell death. Although multiple components of the core autophagy pathways, including Atg8, are required for autophagy and cells to shrink in the midgut of the intestine, loss of either Atg7 or Atg3 function does not influence these cellular processes. Rather, Uba1, the E1 used in ubiquitination, is required for autophagy and reduction of cell size. Our data reveal that distinct autophagy programs are used by different cells within an animal, and disclose an unappreciated role for ubiquitin activation in autophagy.Other Sources
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3762904/pdf/Terms of Use
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