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Cappable-seq data for Sulfolobus islandicus REY15A and cbp1 deletion strains

ABSTRACT: Cappable-seq data for Sulfolobus islandicus REY15A and cbp1 deletion strains

PROVIDER: PRJNA938386 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR23610050.fastq.gz	Fastqsanger.gz
	SRR23610051.fastq.gz	Fastqsanger.gz
	SRR23610052.fastq.gz	Fastqsanger.gz
	SRR23610053.fastq.gz	Fastqsanger.gz

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RNA-seq data for Sulfolobus islandicus REY15A Δcbp1 strain and the parental strain E234

Project description:RNA-seq data for Sulfolobus islandicus REY15A Δcbp1 strain and the parental strain E234

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Cappable-seq data for Sulfolobus islandicus REY15A and cbp1 deletion strains

Project description:Chromatin proteins competes with the transcription machinery for access to genomic DNA and suppress cryptic promoters. CRISPR arrays form the physical memory of CRISPR adaptive immune systems. The incorporation of virus-derived AT-rich DNA into CRISPR arrays renders them prone to harbouring cryptic promoters. Sulfolobales feature extremely long CRISPR arrays spanning several kilobases as well as a CRISPR-specific chromatin protein termed Cbp1. Altered Cbp1 expression affects transcription from CRISPR arrays in multiple ways, but the mechanistic basis remains to be understood. Here, we show that Cbp1 recruits the general chromatin protein Cren7 to form a heteromeric chromatin complex at CRISPR arrays. Cbp1-CreN7 chromatinisation plays a dual role in the transcription of CRISPR array. It suppresses spurious transcription from cryptic CRISPR array-internal promoters via steric occlusion of the transcription machinery while enhancing transcription from promoters in the CRISPR leaders. Our results show that Cbp1-CreN7 chromatinization drives the coordinated transcription of long CRISPR arrays. Additional binding sites of Cbp1 associated with transposases and the leaders of alternative CRISPR arrays hint on a wider regulatory function of Cbp1 linking defense systems and mobile genetic elements.

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Continuous CRISPR spacer acquisition in STSV2-infected crenarchaeon Sulfolobus islandicus REY15A over a 6-day period

Project description:A whole transcriptome study was performed on Sulfolobus islandicus REY15A actively undergoing CRISPR spacer acquisition from the crenarchaeal monocaudavirus STSV2 in rich (TYS) and basal (SCV) media over a 6 day period. Spacer acquisition preceded strong host growth retardation, and changes in viral transcript abundance and virus copy numbers showed significant differences between the two media. Results showed that rich medium favoured CRISPR-Cas immunity generation.

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Project description:Sulfolobus islandicus REY15A transcriptome - Sis/pOE-GGR_pilot1

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Coupling transcriptional activation of CRISPR-Cas and DNA repair systems by Csa3a in Sulfolobus islandicus

Project description:Transcriptome sequencing was carried out on an Illumina HiSeq platform to investigate the activation of CRISPR-Cas and DNA repair systems by Csa3a in Sulfolobus islandicus Rey15A. We compared the differently expressed genes in Sulfolobus islandicus Rey15A strain with csa3a overexpression vs. Sulfolobus islandicus Rey15A strain carrying an empty expression vector, cas1 deletion strain with csa3a overexpression vs. cas1 deletion strain carrying an empty expression vector, as well as interference-deficient strain with csa3a overexpression vs. interference-deficient strain carrying an empty expression vector. We find that cas genes (SiRe_0760, SiRe_0761, SiRe_0762, SiRe_0763), nucleotidyltransferase domain of DNA polymerase beta (SiRe_0459), chromosome segregation protein (SMC)-related ATPase (SiRe_0649), SMC-related protein (SiRe_1142) and three HerA helicases involved in DNA double break repair (encoded by SiRe_0064 and SiRe_0095 of nurA-herA operons, and SiRe_1857) were significantly up-regulated. Our data indicated that the Csa3a regulator couples transcriptional activation of spacer acquisition genes, CRISPR RNA transcription, DNA repair and genome stability genes.

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Project description:Transcriptome sequencing was carried out on an Illumina HiSeq platform to investigate CRISPR-Cas and DNA repair systems by Csa3b in Sulfolobus islandicus Rey15A. We compared the differently expressed genes in Sulfolobus islandicus Rey15A strain with csa3a overexpression vs. Sulfolobus islandicus Rey15A strain carrying an empty expression vector,We find thatcmr-α (SiRe_0890 ~ SiRe_0895) and cmr-β (SiRe_0597 ~ SiRe_0603)、the DNA double strand break (DSB)repair genes, including nurA, rad50, mre11, and herA (SiRe_0061 ~ SiRe_0064), as well as two subunits of DNA polymerase II (SiRe_0615 and SiRe_0617) that function in DNA repair, were significantly up-regulated. Our data indicated that the Csa3b regulator couples transcriptional activation of cmr genes, DNA repair genes.

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