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Insights into the epigenomic landscape of the human malaria vector Anopheles gambiae

ABSTRACT: We characterize the epigenome of the human malaria vector Anopheles gambiae in midgut cells by mapping the distribution and levels of two post-translational histone modifications, H3K27ac and H3K27me3. These histone profiles were then correlated with levels of gene expression obtained by RNA-seq.

ORGANISM(S): Anopheles gambiae

PROVIDER: GSE59773 | GEO | 2014/09/04

SECONDARY ACCESSION(S): PRJNA256184

REPOSITORIES: GEO

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Insights into the epigenomic landscape of the human malaria vector Anopheles gambiae

Project description:We characterize the epigenome of the human malaria vector Anopheles gambiae in midgut cells by mapping the distribution and levels of two post-translational histone modifications, H3K27ac and H3K27me3. These histone profiles were then correlated with levels of gene expression obtained by RNA-seq. ChIP-seq and RNA-seq were performed on adult female A. gambiae midguts. RNA-seq was performed on adult female A. gambiae salivary glands.

2014-09-04 | E-GEOD-59773 | biostudies-arrayexpress

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Project description:Anopheles gambiae mosquitoes are primary human malaria vectors, but we know very little about their mechanisms of transcriptional regulation. We profiled chromatin accessibility by ATAC-seq in laboratory-reared An. gambiae mosquitoes experimentally infected with the human malaria parasite Plasmodium falciparum. By integrating ATAC-seq, RNA-seq and ChIP-seq data we showed a positive correlation between accessibility at promoters and introns, gene expression and active histone marks. By comparing expression and chromatin structure patterns in different tissues, we were able to infer cis-regulatory elements controlling tissue specific gene expression and to predict the in vivo binding sites of relevant transcription factors. The ATAC-seq assay also allowed the precise mapping of active regulatory regions, including novel transcription start sites and enhancers that annotate to mosquito immune-response genes. This study is important not only for advancing our understanding of mechanisms of transcriptional regulation in the mosquito vector of human malaria, but also the information we produced is of great potential for developing new mosquito-control and anti-malaria strategies.

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Expression data from the mosquito Anopheles gambiae midgut 3h after a protein meal with or without E. coli.

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