Journal
NUCLEUS
Volume 11, Issue 1, Pages 219-236Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/19491034.2020.1812872
Keywords
ESCRT-III; lem-domain protein; nuclear pore complex; nuclear envelope; meiosis; replicative lifespan; cellular aging
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Funding
- National Institute of General Medical Sciences [GM117102]
- National Science Foundation [MCB1951313]
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Cellular aging occurs as a cell loses its ability to maintain homeostasis. Aging cells eliminate damaged cellular compartments and other senescence factors via self-renewal. The mechanism that regulates cellular rejuvenation remains to be further elucidated. Using budding yeast gametogenesis as a model, we show here that the endosomal sorting complex required for transport (ESCRT) III regulates nuclear envelope organization. During gametogenesis, the nuclear pore complex (NPC) and other senescence factors are sequestered away from the prospore nuclei. We show that the LEM-domain protein Heh1 (Src1) facilitates the nuclear recruitment of ESCRT-III, which is required for meiotic NPC sequestration and nuclear envelope remodeling. Furthermore, ESCRT-III-mediated nuclear reorganization appears to be critical for gamete rejuvenation, as hindering this process curtails either directly or indirectly the replicative lifespan in gametes. Our findings demonstrate the importance of ESCRT-III in nuclear envelope remodeling and its potential role in eliminating senescence factors during gametogenesis.
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