Meiotic cellular rejuvenation is coupled to nuclear remodeling in budding yeast
- University of California, Berkeley, United States
Abstract
Production of healthy gametes in meiosis relies on the quality control and proper distribution of both nuclear and cytoplasmic contents. Meiotic differentiation naturally eliminates age-induced cellular damage by an unknown mechanism. Using time-lapse fluorescence microscopy in budding yeast, we found that nuclear senescence factors - including protein aggregates, extrachromosomal ribosomal DNA circles, and abnormal nucleolar material - are sequestered away from chromosomes during meiosis II and subsequently eliminated. A similar sequestration and elimination process occurs for the core subunits of the nuclear pore complex in both young and aged cells. Nuclear envelope remodeling drives the formation of a membranous compartment containing the sequestered material. Importantly, de novo generation of plasma membrane is required for the sequestration event, preventing the inheritance of long-lived nucleoporins and senescence factors into the newly formed gametes. Our study uncovers a new mechanism of nuclear quality control and provides insight into its function in meiotic cellular rejuvenation.
Data availability
Data generated or analyzed during this study are included in the manuscript and supporting files. All imaging data used for analysis will be uploaded to the Image Data Resource repository.
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Author details
Funding
National Institutes of Health (DP2 AG055946-01)
- Elçin Ünal
Pew Charitable Trusts (00027344)
- Elçin Ünal
Damon Runyon Cancer Research Foundation (35-15)
- Elçin Ünal
Glenn Foundation for Medical Research
- Elçin Ünal
National Science Foundation (DGE 1752814)
- Grant A King
National Institutes of Health (T32 GM007232)
- Grant A King
National Institutes of Health (F31AG060656)
- Jay S Goodman
National Institutes of Health (T32 GM007127-41)
- Jay S Goodman
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2019, King et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Meiotic cellular rejuvenation is coupled to nuclear remodeling in budding yeast
eLife 8:e47156.
https://doi.org/10.7554/eLife.47156
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