Gene expression and chromatin conformation differs between worker bees performing different tasks

Area of Science:

• Neurobiology
• Genomics
• Behavioral Ecology

Background:

• Understanding gene regulation's role in behavioral diversity is crucial.
• Honey bees serve as a model for studying gene expression and behavior links.
• Cis-regulatory elements are key to deciphering genomic and transcriptomic influences on bee behavior.

Purpose of the Study:

• To investigate the relationship between individual behavior differences and gene expression in honey bee brains.
• To identify cis-regulatory elements and motifs associated with transcription factors (TFs) and differentially expressed genes.
• To elucidate the transcriptional regulatory mechanisms underlying task-specific behaviors in honey bees.

Main Methods:

• Transcriptome and genome-wide chromatin accessibility assays on honey bee brain tissues.
• Analysis of brain tissues from honey bees exhibiting different behavioral states.
• Identification of cis-motifs within open chromatin regions to link TFs and genes.

Main Results:

• Identified genetic regulatory modules for distinct tasks, involving key TFs (CTCF, Trl, schlank).
• Found open chromatin regions enriched for TF-binding motifs.
• Observed prominent transcriptomic changes in nervous system development linked to behavior switch and chromatin modifications.

Conclusions:

• Revealed the regulatory landscape across three honey bee behavioral stages.
• Identified interactive molecular networks governing different tasks.
• Provided a comprehensive view of honey bee behavioral differences for future research.