Asymmetric inheritance of spindle microtubule-organizing centres preserves replicative lifespan
The differential distribution of the microtubule-organizing centres (MTOCs) that orchestrate spindle formation during cell division is a fascinating phenomenon originally described in Saccharomyces cerevisiae and later found to be conserved during stem cell divisions in organisms ranging from Drosop...
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Published in | Nature cell biology Vol. 21; no. 8; pp. 952 - 965 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group UK
01.08.2019
Nature Publishing Group |
Subjects | |
Online Access | Get full text |
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Summary: | The differential distribution of the microtubule-organizing centres (MTOCs) that orchestrate spindle formation during cell division is a fascinating phenomenon originally described in
Saccharomyces cerevisiae
and later found to be conserved during stem cell divisions in organisms ranging from
Drosophila
to humans. Whether predetermined MTOC inheritance patterns fulfil any biological function is however unknown. Using a genetically designed
S. cerevisiae
strain that displays a constitutively inverted MTOC fate, we demonstrate that the asymmetric segregation of these structures is critical to ensure normal levels of the Sir2 sirtuin and correct localization of the mitochondrial inheritance regulator Mfb1, and therefore to properly distribute functional mitochondria and protein aggregates between the mother and daughter cells. Consequently, interfering with this process severely accelerates cellular ageing.
Yeast cells segregate the old spindle pole body into the bud. Manzano-López et al. report that inverted segregation accelerates ageing due to aberrant partition of protein aggregates and damaged mitochondria. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 content type line 23 |
ISSN: | 1465-7392 1476-4679 1476-4679 |
DOI: | 10.1038/s41556-019-0364-8 |