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Effect of loss of Ecdysone-induced protein 93F (E93) on the Drosophila melanogaster antennal transcriptome.

ABSTRACT: Ecdysone-induced protein 93F (E93) regulates local chromatin structure and/or gene transcription, raising the question of whether expression of Ir75c, Ir75b and Ir75a receptors in antenna is affected at the transcriptional level in the absence of this protein. We performed bulk RNA-sequencing (RNA-seq) of control and E93RNAi antennae. In control RNA-seq samples, we predicted the existence of seven distinct transcripts encoded by these three receptor genes. Notably, many transcripts initiating from Ir75c do not terminate at the 3’ end of this gene but rather run through the Ir75b and Ir75a exons. Similarly, a majority of transcripts initiating from Ir75b incorporate exons 2-7 of Ir75a. The pattern of transcription is consistent with the absence of canonical transcription termination/polyadenylation sequences downstream of the Ir75c and Ir75b coding regions; such a sequence is only present 3’ of Ir75a. All transcripts initiating from Ir75c are highly up-regulated in the absence of E93, consistent with the ectopic expression of receptor protein. Transcription initiating from Ir75b is strongly diminished, concordant with the loss of Ir75b protein expression. By contrast, Ir75a transcripts levels were not significantly lower in E93RNAi antennae, despite the loss of detectable Ir75a protein.

ORGANISM(S): Drosophila melanogaster

PROVIDER: GSE150296 | GEO | 2021/01/31

REPOSITORIES: GEO

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