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A chromatin link to caste identity in the carpenter ant Camponotus floridanus

ABSTRACT: The goal of this study was to assay the extent of variation in chromatin organization between 3 ant castes (major and minor female workers and males) in one colony of Camponotus floridanus carpenter ant using ChIPseq.

ORGANISM(S): Camponotus floridanus

PROVIDER: GSE37523 | GEO | 2012/11/26

SECONDARY ACCESSION(S): PRJNA161007

REPOSITORIES: GEO

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A chromatin link to caste identity in the carpenter ant Camponotus floridanus

Project description:The goal of this study was to assay the extent of variation in chromatin organization between 3 ant castes (major and minor female workers and males) in one colony of Camponotus floridanus carpenter ant using ChIPseq. 45 samples total: 30 ChIP samples and 3 inputs for total histone H3, 7 histone H3 PTMs and RNA Pol II in major, minor, and male ants; CBP in major and minor ants; the major H3K27ac sample was replicated. 4 ChIP samples for H3 and H3K27ac in brains of majors and minors, and 2 inputs. 2 RNAseq samples for major and minor ants head+thorax; 4 RNAseq samples for brain (majors and minors with 2 replicates each).

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Camponotus floridanus

Project description:A chromatin link to caste identity in the carpenter ant Camponotus floridanus

| PRJNA161007 | ENA

A chromatin link to caste identity in the carpenter ant Camponotus floridanus.

Project description:In many ant species, sibling larvae follow alternative ontogenetic trajectories that generate striking variation in morphology and behavior among adults. These organism-level outcomes are often determined by environmental rather than genetic factors. Therefore, epigenetic mechanisms may mediate the expression of adult polyphenisms. We produced the first genome-wide maps of chromatin structure in a eusocial insect and found that gene-proximal changes in histone modifications, notably H3K27 acetylation, discriminate two female worker and male castes in Camponotus floridanus ants and partially explain differential gene expression between castes. Genes showing coordinated changes in H3K27ac and RNA implicate muscle development, neuronal regulation, and sensory responses in modulating caste identity. Binding sites of the acetyltransferase CBP harbor the greatest caste variation in H3K27ac, are enriched with motifs for conserved transcription factors, and show evolutionary expansion near developmental and neuronal genes. These results suggest that environmental effects on caste identity may be mediated by differential recruitment of CBP to chromatin. We propose that epigenetic mechanisms that modify chromatin structure may help orchestrate the generation and maintenance of polyphenic caste morphology and social behavior in ants.

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Epigenetic (re)programming of caste-specific behavior in the ant Camponotus floridanus

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Project description:Camponotus floridanus Raw sequence reads