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Fission yeast ortholog of REEP1-4 promotes autophagosomal enclosure of ER-phagy/nucleophagy cargos
Fission yeast ortholog of REEP1-4 promotes autophagosomal enclosure of ER-phagy/nucleophagy cargos
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Length:
20 minutes
Released:
Apr 26, 2023
Format:
Podcast episode
Description
Link to bioRxiv paper:
http://biorxiv.org/cgi/content/short/2023.04.24.538066v1?rss=1
Authors: Zou, C.-X., Ma, Z.-H., Pan, Z.-Q., Xu, D.-D., Suo, F., Jiang, Z., Du, L.-L.
Abstract:
Selective macroautophagy of the endoplasmic reticulum (ER) and the nucleus, referred to as ER-phagy and nucleophagy, respectively, are processes whose mechanisms remain incompletely understood. Through an imaging-based screen, we find that fission yeast Yep1, the ortholog of human REEP1-4, is essential for ER-phagy and nucleophagy. Yep1 is required for the autophagosomal enclosure of cargos during ER-phagy and nucleophagy. In its absence, membrane structures derived from the nucleus and cortical ER accumulate in the cytoplasm. Its ER-phagy role depends on its abilities to self-interact and shape membranes, and requires its C-terminal amphipathic helices. In addition, we show that human REEP1-4 and budding yeast Atg40 can substitute for the ER-phagy function of Yep1, and Atg40 is a divergent homolog of Yep1 and REEP1-4. Our study unveils an unexpected mechanism governing the autophagosomal enclosure of ER-phagy/nucleophagy cargos, and sheds new light on the functions and evolution of REEP family proteins.
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Podcast created by Paper Player, LLC
http://biorxiv.org/cgi/content/short/2023.04.24.538066v1?rss=1
Authors: Zou, C.-X., Ma, Z.-H., Pan, Z.-Q., Xu, D.-D., Suo, F., Jiang, Z., Du, L.-L.
Abstract:
Selective macroautophagy of the endoplasmic reticulum (ER) and the nucleus, referred to as ER-phagy and nucleophagy, respectively, are processes whose mechanisms remain incompletely understood. Through an imaging-based screen, we find that fission yeast Yep1, the ortholog of human REEP1-4, is essential for ER-phagy and nucleophagy. Yep1 is required for the autophagosomal enclosure of cargos during ER-phagy and nucleophagy. In its absence, membrane structures derived from the nucleus and cortical ER accumulate in the cytoplasm. Its ER-phagy role depends on its abilities to self-interact and shape membranes, and requires its C-terminal amphipathic helices. In addition, we show that human REEP1-4 and budding yeast Atg40 can substitute for the ER-phagy function of Yep1, and Atg40 is a divergent homolog of Yep1 and REEP1-4. Our study unveils an unexpected mechanism governing the autophagosomal enclosure of ER-phagy/nucleophagy cargos, and sheds new light on the functions and evolution of REEP family proteins.
Copy rights belong to original authors. Visit the link for more info
Podcast created by Paper Player, LLC
Released:
Apr 26, 2023
Format:
Podcast episode
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