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Brain RNA-seq one day after knockdown of the corazonin receptor in Harpegnathos ants

ABSTRACT: This experiment aimed at determining the immediate (d1) transcriptional consequences of knockding down the corazonin receptor in the ant brain.

ORGANISM(S): Harpegnathos saltator

PROVIDER: GSE99130 | GEO | 2017/08/10

SECONDARY ACCESSION(S): PRJNA387394

REPOSITORIES: GEO

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Brain RNA-seq one day intra-head injection of corazonin or control peptide in Harpegnathos ants.

Project description:This experiment aimed at determining the immediate (d1) transcriptional consequences of corazonin in the brain.

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Genomic comparison of the ants Camponotus floridanus and Harpegnathos saltator.

Project description:The organized societies of ants include short-lived worker castes displaying specialized behavior and morphology and long-lived queens dedicated to reproduction. We sequenced and compared the genomes of two socially divergent ant species: Camponotus floridanus and Harpegnathos saltator. Both genomes contained high amounts of CpG, despite the presence of DNA methylation, which in non-Hymenoptera correlates with CpG depletion. Comparison of gene expression in different castes identified up-regulation of telomerase and sirtuin deacetylases in longer-lived H. saltator reproductives, caste-specific expression of microRNAs and SMYD histone methyltransferases, and differential regulation of genes implicated in neuronal function and chemical communication. Our findings provide clues on the molecular differences between castes in these two ants and establish a new experimental model to study epigenetics in aging and behavior.

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Imaging with Mass Spectrometry of Bacteria on the Exoskeleton of Fungus-Growing Ants

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Genome-wide and caste-specific DNA methylomes of the ants Camponotus floridanus and Harpegnathos saltator.

Project description:Ant societies comprise individuals belonging to different castes characterized by specialized morphologies and behaviors. Because ant embryos can follow different developmental trajectories, epigenetic mechanisms must play a role in caste determination. Ants have a full set of DNA methyltransferases and their genomes contain methylcytosine. To determine the relationship between DNA methylation and phenotypic plasticity in ants, we obtained and compared the genome-wide methylomes of different castes and developmental stages of Camponotus floridanus and Harpegnathos saltator.In the ant genomes, methylcytosines are found both in symmetric CG dinucleotides (CpG) and non-CpG contexts and are strongly enriched at exons of active genes. Changes in exonic DNA methylation correlate with alternative splicing events such as exon skipping and alternative splice site selection. Several genes exhibit caste-specific and developmental changes in DNA methylation that are conserved between the two species, including genes involved in reproduction, telomere maintenance, and noncoding RNA metabolism. Several loci are methylated and expressed monoallelically, and in some cases, the choice of methylated allele depends on the caste.These first ant methylomes and their intra- and interspecies comparison reveal an exonic methylation pattern that points to a connection between DNA methylation and splicing. The presence of monoallelic DNA methylation and the methylation of non-CpG sites in all samples suggest roles in genome regulation in these social insects, including the intriguing possibility of parental or caste-specific genomic imprinting.

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RNA-seq from Camponotus and Harpegnathos ants for genome annotation

Project description:This SuperSeries is composed of the SubSeries listed below.

2018-05-24 | GSE102605 | GEO

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