Project description:Epigenetic regulation of mutually exclusive transcription within the var gene family is important for infection and pathogenesis of the malaria parasite Plasmodium falciparum. var genes are kept transcriptionally silent via heterochromatic clusters located at the nuclear periphery; however, only a few proteins have been shown to play a direct role in var gene transcriptional regulation. Importantly, the chromatin components that contribute to var gene nuclear organization remain unknown. Here, we adapted a CRISPR-based immunoprecipitation-mass spectrometry approach for de novo identification of factors associated with specific transcriptional regulatory sequences of var genes. Tagged, catalytically inactive Cas9 (“dCas9”) was targeted to var gene promoters or introns, cross-linked, and immunoprecipitated with all DNA, proteins, and RNA associated with the targeted locus. Chromatin immunoprecipitation followed by sequencing demonstrated that genome-wide dCas9 binding was specific and robust. Proteomics analysis of dCas9-immunoprecipitates identified specific proteins for each target region, including known and novel factors such as DNA binding proteins, chromatin remodelers, and structural proteins. We also demonstrate the ability to immunoprecipitate RNA that is closely associated to the targeted locus. Our CRISPR/dCas9 study establishes a new tool for targeted purification of specific genomic loci and advances understanding of virulence gene regulation in the human malaria parasite.

2020-05-01 | GSE129397 | GEO

HIC_seq data for Rrp6 project analysis in malaria (Plasmodium falciparum)

Project description:We performed Hi-C assay to address the interaction of central var genes in ruf6-var pairs，subtelomeric upsA-subtype var genes and other HP1-associated genes

2020-01-01 | GSE133240 | GEO

Vitex rotundifolia

Project description:Vitex rotundifolia Genome sequencing and assembly

| PRJNA782863 | ENA