Calorie restriction reduces rDNA recombination independently of rDNA silencing

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Calorie restriction reduces rDNA recombination independently of rDNA silencing

Calorie restriction (CR) extends lifespan in yeast, worms, flies and mammals, suggesting that it acts via a conserved mechanism. In yeast, activation of the NAD-dependent histone deacetylase, Sir2, by CR is thought to increase silencing at the ribosomal DNA, thereby reducing the recombination-induced generation of extrachromosomal rDNA circles, hence increasing replicative lifespan. Although ac...

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The tandem array of ribosomal DNA (rDNA) in Saccharomyces cerevisiae is subjected to transcriptional silencing of RNA polymerase II-transcribed genes. This form of silencing depends on SIR2 and has been tightly linked to the suppression of rDNA recombination and the control of cellular lifespan. Paradoxically, rDNA silencing takes place in the context of an extremely high rate of RNA polymerase...

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Identification of the bacterial community of maple sap by using amplified ribosomal DNA (rDNA) restriction analysis and rDNA sequencing.

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ژورنال

عنوان ژورنال: Aging Cell

سال: 2009

ISSN: 1474-9718,1474-9726

DOI: 10.1111/j.1474-9726.2009.00514.x