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- W4315433072 abstract "Genome instability can drive aging in many organisms. The ribosomal RNA gene (rDNA) cluster is one of the most unstable regions in the genome and the stability of this region impacts replicative lifespan in budding yeast. To understand the underlying mechanism, we search for yeast mutants with stabler rDNA and longer lifespans than wild-type cells. We show that absence of a transcription elongation factor, Spt4, results in increased rDNA stability, reduced levels of non-coding RNA transcripts from the regulatory E-pro promoter in the rDNA, and extended replicative lifespan in a SIR2-dependent manner. Spt4-dependent lifespan restriction is abolished in the absence of non-coding RNA transcription at the E-pro locus. The amount of Spt4 increases and its function becomes more important as cells age. These findings suggest that Spt4 is a promising aging factor that accelerates cellular senescence through rDNA instability driven by non-coding RNA transcription." @default.
- W4315433072 created "2023-01-11" @default.
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- W4315433072 date "2023-01-01" @default.
- W4315433072 modified "2023-10-15" @default.
- W4315433072 title "Spt4 promotes cellular senescence by activating non-coding RNA transcription in ribosomal RNA gene clusters" @default.
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- W4315433072 doi "https://doi.org/10.1016/j.celrep.2022.111944" @default.
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