Bryant LA, Brierley C, Flavell AJ, Sinclair JH. The retrotransposon copia regulates Drosophila gene expression both positively and negatively.
Nucleic Acids Res 1991;
19:5533-6. [PMID:
1658733 PMCID:
PMC328953 DOI:
10.1093/nar/19.20.5533]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
The D. melanogaster transposable element copia is structurally similar to retroviral proviruses. We have asked whether copia encodes regulatory functions which have been observed in certain other proviruses. We have introduced reporter constructs based on the copia promoter and other Drosophila promoters into Drosophila cells and asked if copia has any affect on their expression. We find that, whilst copia negatively regulates expression from its own promoter, it also positively regulates expression from the larval serum protein 1 promoter. Analysis of RNA suggests that both regulatory functions occur by post-transcriptional mechanisms.
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