Abstract
P cytotype is a regulatory state, characteristic of Drosophila P-strain females, in which P-element transposition is repressed. P cytotype is established maternally in the germ line but is also dependent on the presence of P elements in the zygote. One aspect of P cytotype involves transcriptional repression of the P-element promoter. Here, we show that transcriptional repression by P cytotype in the female germ line occurs by a general promoter-independent mechanism with heterologous promoters carried in P-element vectors. P-cytotype transcriptional repression results in low levels of pre-mRNA and a reduction in splicing of the P-element third intron (IVS3)-containing mRNA, thus causing an increase in the proportion of 66-kD repressor mRNA. Increased retention of IVS3 in P cytotype would result in an autoregulatory loop of 66-kD repressor production. This combination of germ-line transcriptional repression and splicing control provides a mechanism to maintain repression during the maternal inheritance of P cytotype. These findings suggest that transcriptional repression may play an additional role in the regulation of gene expression, namely allowing alteration of pre-mRNA splicing patterns.
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Dates
Type | When |
---|---|
Created | 18 years, 2 months ago (June 5, 2007, 5:15 p.m.) |
Deposited | 3 years, 9 months ago (Nov. 14, 2021, 9:35 p.m.) |
Indexed | 2 weeks, 6 days ago (Aug. 6, 2025, 10 a.m.) |
Issued | 30 years, 3 months ago (May 15, 1995) |
Published | 30 years, 3 months ago (May 15, 1995) |
Published Online | 30 years, 3 months ago (May 15, 1995) |
Published Print | 30 years, 3 months ago (May 15, 1995) |
@article{Roche_1995, title={P-element repressor autoregulation involves germ-line transcriptional repression and reduction of third intron splicing.}, volume={9}, ISSN={1549-5477}, url={http://dx.doi.org/10.1101/gad.9.10.1278}, DOI={10.1101/gad.9.10.1278}, number={10}, journal={Genes & Development}, publisher={Cold Spring Harbor Laboratory}, author={Roche, S E and Schiff, M and Rio, D C}, year={1995}, month=may, pages={1278–1288} }