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- W2114512247 abstract "For a number of organisms, the ability to withstand periods of nutrient deprivation correlates directly with lifespan. However, the underlying molecular mechanisms are poorly understood. We show that deletion of the N-myristoylprotein, Sip2p, reduces resistance to nutrient deprivation and shortens lifespan in Saccharomyces cerevisiae. This reduced lifespan is due to accelerated aging, as defined by loss of silencing from telomeres and mating loci, nucleolar fragmentation, and accumulation of extrachromosomal rDNA. Genetic studies indicate that sip2Delta produces its effect on aging by increasing the activity of Snf1p, a serine/threonine kinase involved in regulating global cellular responses to glucose starvation. Biochemical analyses reveal that as yeast age, hexokinase activity increases as does cellular ATP and NAD(+) content. The change in glucose metabolism represents a new correlate of aging in yeast and occurs to a greater degree, and at earlier generational ages in sip2Delta cells. Sip2p and Snf1p provide new molecular links between the regulation of cellular energy utilization and aging." @default.
- W2114512247 created "2016-06-24" @default.
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- W2114512247 date "2000-08-01" @default.
- W2114512247 modified "2023-10-11" @default.
- W2114512247 title "Sip2p and its partner Snf1p kinase affect aging in <i>S. cerevisiae</i>" @default.
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- W2114512247 doi "https://doi.org/10.1101/gad.14.15.1872" @default.
- W2114512247 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/316829" @default.
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