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Repression precedes independent evolutionary gains of a highly specific gene expression pattern

ABSTRACT: Repression precedes independent evolutionary gains of a highly specific gene expression pattern

PROVIDER: PRJNA767538 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16126214_1.fastq.gz	Fastqsanger.gz
	SRR16126214_2.fastq.gz	Fastqsanger.gz

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Repression precedes independent evolutionary gains of a highly specific gene expression pattern.

Project description:Highly specific expression patterns can be caused by the overlapping activities of activator and repressor sequences in enhancers. However, few studies illuminate how these sequences evolve in the origin of new enhancers. Here, we show that expression of the bond gene in the semicircular wall epithelium (swe) of the Drosophila melanogaster male ejaculatory bulb (EB) is controlled by an enhancer consisting of an activator region that requires Abdominal-B driving expression in the entire EB and a repressor region that restricts this expression to the EB swe. Although this expression pattern is independently gained in the distantly related Scaptodrosophila lebanonensis and does not require Abdominal-B, we show that functionally similar repressor sequences are present in Scaptodrosophila and also in species that do not express bond in the EB. We suggest that during enhancer evolution, repressor sequences can precede the evolution of activator sequences and may lead to similar but independently evolved expression patterns.

| S-EPMC8578697 | biostudies-literature

Repression precedes independent evolutionary gains of a highly specific gene expression pattern

Project description:This study addresses how activator and repressor sequences evolve and interact during enhancer evolutiom in the context of a fatty acyl-CoA elongase gene that contributes to pheromone production in Drosophila. The highly specific tissue expression of the gene in the ejaculatory bulb resulted from the initial evolution of a repressor sequence prior to the independent evolution of an activator sequence.

2021-10-02 | GSE185053 | GEO

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Evolutionary transcriptomics of Eutherian gene expression gains and the origins of decidualization [Set 2]

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