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Calibrated Smc3 ChIP-seq for wild type, eco1-aa, wpl1-delta and eco1-aa wpl1-delta strains arrested in meiotic prophase I

ABSTRACT: Calibrated Smc3 ChIP-seq for wild type, eco1-aa, wpl1-delta and eco1-aa wpl1-delta strains arrested in meiotic prophase I

PROVIDER: PRJNA767386 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16118208_1.fastq.gz	Fastqsanger.gz
	SRR16118208_2.fastq.gz	Fastqsanger.gz
	SRR16118209_1.fastq.gz	Fastqsanger.gz
	SRR16118209_2.fastq.gz	Fastqsanger.gz
	SRR16118210_1.fastq.gz	Fastqsanger.gz

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Releasing activity disengages cohesinâs Smc3/Scc1 interface in a process blocked by acetylation

Project description:Sister chromatid cohesion conferred by entrapment of sister DNAs within a tripartite ring formed between cohesinâs Scc1, Smc1, and Smc3 subunits is generated during S and eventually destroyed at anaphase through cleavage of Scc1 by separase. Throughout the cell cycle, cohesinâs association with chromosomes is controlled by opposing activities: loading by the Scc2/4 complex and release by a separase independent releasing activity. Co-entrapment of sister DNAs during replication is accompanied by acetylation of Smc3 by Eco1, which blocks releasing activity and ensures that sisters remain stably connected. Because fusion of Smc3 to Scc1 prevents release and bypasses the requirement for Eco1, we suggested that release is mediated by disengagement of the Smc3/Scc1 interface. We now show that all mutations capable of bypassing Eco1, be they in cohesinâs Smc1, Smc3, Scc1,Wapl, Pds5, or Scc3 subunits, greatly reduce dissociation of N-terminal cleavage fragments of Scc1 (NScc1) from Smc3. We show that this process involves interaction between Smc ATPase heads and is inhibited by Smc3 acetylation Effect of mutations QQ and EQ in Smc3 on cohesin loading onto chromosomes

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Project description:Calibrated Smc3 ChIP-seq for wild type, smc3-2R, wpl1Δ and smc3-2R wpl1Δ strains arrested in meiotic prophase I

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Releasing activity disengages cohesin’s Smc3/Scc1 interface in a process blocked by acetylation

Project description:Sister chromatid cohesion conferred by entrapment of sister DNAs within a tripartite ring formed between cohesin’s Scc1, Smc1, and Smc3 subunits is generated during S and eventually destroyed at anaphase through cleavage of Scc1 by separase. Throughout the cell cycle, cohesin’s association with chromosomes is controlled by opposing activities: loading by the Scc2/4 complex and release by a separase independent releasing activity. Co-entrapment of sister DNAs during replication is accompanied by acetylation of Smc3 by Eco1, which blocks releasing activity and ensures that sisters remain stably connected. Because fusion of Smc3 to Scc1 prevents release and bypasses the requirement for Eco1, we suggested that release is mediated by disengagement of the Smc3/Scc1 interface. We now show that all mutations capable of bypassing Eco1, be they in cohesin’s Smc1, Smc3, Scc1,Wapl, Pds5, or Scc3 subunits, greatly reduce dissociation of N-terminal cleavage fragments of Scc1 (NScc1) from Smc3. We show that this process involves interaction between Smc ATPase heads and is inhibited by Smc3 acetylation

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