|Citation||Ryner, L.C., Baker, B.S. (1991). Regulation of doublesex pre-mRNA processing occurs by 3'-splice site activation. Genes Dev. 5(): 2071--2085. (Export to RIS)|
|Publication Type||Research paper|
|PubMed Abstract||Sex-specific alternative processing of the doublesex (dsx) pre-mRNA controls somatic sexual differentiation in Drosophila melanogaster. Processing in the female-specific pattern results from the utilization of an upstream 3'-terminal exon and requires the activities of both the transformer (tra) and transformer-2 (tra-2) genes. Use of the more downstream male-specific terminal exons does not require the activities of these genes and is thus considered the default dsx-processing pattern. Here, we used transient expression of dsx pre-mRNAs in the presence or absence of tra and tra-2 gene products in Drosophila tissue culture cells to investigate the molecular mechanism controlling this alternative RNA-processing decision. These studies reveal that female-specific processing of dsx pre-mRNA is controlled by tra and tra-2 through the positive regulation of female-specific alternative 3'-terminal exon use. Delineation of cis-acting sequences necessary for regulation shows that a 540-nucleotide region from within the female exon is both necessary and sufficient for regulation. In addition, utilization of the female-specific 3'-splice site (3'SS) is regulated independently of female-specific polyadenylation. Regulated polyadenylation was obtained only in the presence of splicing, suggesting that activation of female-specific exon use occurs by 3'SS activation.|
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|Language of Publication||English|
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|Also Published As|
|Title||Genes & Development|
|Data from Reference|