alexa Regulation of heterochromatic silencing and histone H3 lysine-9 methylation by RNAi.
Oncology

Oncology

Cancer Surgery

Author(s): Volpe TA, Kidner C, Hall IM, Teng G, Grewal SI, , Volpe TA, Kidner C, Hall IM, Teng G, Grewal SI,

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Abstract Eukaryotic heterochromatin is characterized by a high density of repeats and transposons, as well as by modified histones, and influences both gene expression and chromosome segregation. In the fission yeast Schizosaccharomyces pombe, we deleted the argonaute, dicer, and RNA-dependent RNA polymerase gene homologs, which encode part of the machinery responsible for RNA interference (RNAi). Deletion results in the aberrant accumulation of complementary transcripts from centromeric heterochromatic repeats. This is accompanied by transcriptional de-repression of transgenes integrated at the centromere, loss of histone H3 lysine-9 methylation, and impairment of centromere function. We propose that double-stranded RNA arising from centromeric repeats targets formation and maintenance of heterochromatin through RNAi. This article was published in Science and referenced in Cancer Surgery

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