Detailed structure of the Drosophila melanogaster stellate genes and their transcripts.
The X-linked Stellate locus contains two major size classes of a tandemly repeated gene. An example of each class has been sequenced. The steady-state level of Stellate RNA is much higher in XO testis than in XY testis. Sequencing of six cDNA clones derived from XO testis RNA shows that there are two major introns in the Stellate genes. Primer extension and RNase protection analyses show that these introns are spliced much more efficiently in XO than in XY testis. These results also indicate the major transcriptional start site for Stellate RNA. P element transformation results with a marked Stellate gene demonstrate that at least one of the genes sequenced contains a functional promoter, which generates low levels of RNA in XY testis and high levels of RNA in XO testis. This promoter does not contain a TATA element in the -30 region relative to the transcriptional start. Previous results had implicated a specific region of the Y chromosome, designated here as the Su(Ste) locus, in the control of the Stellate genes on the X. Analysis using segmental Y deficiencies shows that the Su(Ste) region suppresses both the high levels and efficient splicing of Stellate RNA.
Central Research & Development Department, E. I. du Pont de Nemours & Co., Inc., Wilmington, Delaware 19880-0328.
K J
KJ
Livak
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D004247:DNA / Q000235:genetics; D004331:Drosophila melanogaster / Q000235:genetics*; D005796:Genes; D007438:Introns; D008297:Male; D008969:Molecular Sequence Data; D011401:Promoter Regions, Genetic; D012313:RNA / Q000032:analysis / Q000235:genetics*; D012326:RNA Splicing; D012091:Repetitive Sequences, Nucleic Acid; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic; D014170:Transformation, Genetic
D012313:RNA; D004247:DNA