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Plasmodium falciparum 3D7

ABSTRACT: Histone variant, H2B.Z demarcates the AT-rich promoter regions of the Plasmodium falciparum genome

PROVIDER: PRJNA171532 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR527826.fastq.gz	Fastqsanger.gz
	SRR527827.fastq.gz	Fastqsanger.gz
	SRR527828.fastq.gz	Fastqsanger.gz
	SRR527829.fastq.gz	Fastqsanger.gz
	SRR527830.fastq.gz	Fastqsanger.gz

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Histone variant, H2B.Z demarcates the AT-rich promoter regions of the Plasmodium falciparum genome

Project description:Histone variants are key components of the epigenetic code and evolved to perform specific functions in transcriptional regulation, DNA repair, chromosome segregation and other fundamental processes. H2B.Z is a rare, apicomplexan-specific variant of histone H2B. Here we show that in Plasmodium falciparum H2B.Z localises to euchromatic intergenic regions throughout intraerythrocytic development and together with H2A.Z forms a double-variant nucleosomes subtype. These nucleosomes are enriched in promoters over 3’ intergenic regions and their occupancy generally correlates with the strength of the promoter, but not with its temporal activity. Remarkably, H2B.Z occupancy levels exhibit a clear correlation with the base-composition of the underlying DNA, raising the intriguing possibility that the extreme AT-content of the intergenic regions within the Plasmodium genome might be instructive for histone variant deposition. In summary, our data shows that the H2A.Z/H2B.Z double-variant nucleosome demarcates putative regulatory regions of the P. falciparum epigenome and likely provides a scaffold for dynamic regulation of gene expression in this deadly human pathogen. Genome-wide localization of H2B.Z has been studied at three stages of intraerythrocytic development by Illumina sequencing of chromatin-immunoprecipitated and input DNA.

2013-03-05 | E-GEOD-39702 | biostudies-arrayexpress

Histone variant, H2B.Z demarcates the AT-rich promoter regions of the Plasmodium falciparum genome

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Expression analysis of Plasmodium falciparum 3D7 delta-PfPuf2 mutant

Project description:Investigation of whole genome gene expression level changes in Plasmodium falciparum 3D7 delta-PfPuf2 mutant, compared to the wild-type strain 3D7. The mutation engineered into this strain render tanslational control. The mutants analyzed in this study are further described in Miao J, Li J, Fan Q, Li X, Li X, Cui L.2010. The Puf-family RNA-binding protein PfPuf2 regulates sexual development and sex differentiation in the malaria parasite Plasmodium falciparum. J Cell Sci. 123(7):1039-49 (PMID 20197405). A 12 chip study using total RNA recovered from six separate wild-type cultures of Plasmodium falciparum 3D7 at gametocyte stage III (three cultures) and stage V (three cultures) and six separate cultures of dalta PfPuf2 mutant at gametocyte stage III (three cultures) and stage V (three cultures). Each chip measures the expression level of 5,367 genes from Plasmodium falciparum 3D7 with 45-60 mer probes with two replicates on final array of 71618 probes.

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