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Composite DNA storage

ABSTRACT: DNA storage of digital media using composite DNA

PROVIDER: PRJEB32427 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR3308451_1.fastq.gz	Fastqsanger.gz
	ERR3308451_2.fastq.gz	Fastqsanger.gz
	ERR3308811_1.fastq.gz	Fastqsanger.gz
	ERR3308811_2.fastq.gz	Fastqsanger.gz
	ERR3308452_1.fastq.gz	Fastqsanger.gz

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Project description:Epigenetic inheritance of heterochromatin requires DNA sequence-independent propagation mechanisms, coupling to RNAi, or input from DNA sequence, but how DNA contributes to inheritance is not understood. Here, we identify a DNA element (termed “maintainer”) that is sufficient for epigenetic inheritance of preexisting histone H3 lysine 9 methylation (H3K9me) and heterochromatin in Schizosaccharomyces pombe, but cannot establish de novo gene silencing in wild-type cells. This maintainer is a composite DNA element with binding sites for the Atf1/Pcr1 and Deb1 transcription factors and the Origin Recognition Complex (ORC), located within a 130-base pair region, and can be converted to a silencer in cells with lower rates of H3K9me turnover, suggesting that it participates in recruiting the H3K9 methyltransferase Clr4/Suv39h. These results suggest that, in the absence of RNAi, histone H3K9me is only heritable when it can collaborate with maintainer-associated DNA-binding proteins that help recruit the enzyme responsible for its epigenetic deposition.

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A composite DNA element that functions as a maintainer required for epigenetic inheritance of heterochromatin

Project description:Epigenetic inheritance of heterochromatin requires sequence - independent propagation mechanisms and input from DNA sequence, but how DNA contributes to inheritance is not understood. Here, we identify a DNA element ( term ed the “maintainer” ) that is necessary and sufficient for epigenetic inheritance of preexisting histone H3 lysine 9 methylation (H3K9me) and heterochromatin i n the fission yeast Schizosaccharomyces pombe . In wild - type cells, d espite its requirement for maintenance of H3K9me, the maintainer cannot establish de novo gene silencing. The maintainer is a composite 1307 - base pair DNA element with binding sites for the Atf1/Pcr1 and Deb1 transcription factors and the O rigin R ecognition C omplex (ORC) and can be converted to a silencer in cells with lower rates of H3K9me turnover , suggesting that it participate s in recruiting the H3K9 methyltransferase Clr4 / Suv39h . T hese results suggest tha t histone H3K9me is only heritable when it can collaborate with maintainer - associated DNA - binding proteins that help recruit the enzyme responsible for its epigenetic deposition .

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