title: Two independent cis-acting elements regulate the sex- and tissue-specific expression of yp3 in Drosophila melanogaster.
abstract: In Drosophila, the three yolk protein (yp) genes are transcribed in a sex-, tissue- and developmentally specific manner, providing an ideal system in which to investigate the factors involved in their regulation. The yolk proteins are synthesized in the fat body of adult females, and in the ovarian follicle cells surrounding the developing oocyte during stages 8-10 of oogenesis. We report here an analysis of the yolk protein 3 (yp3) gene and its flanking sequences by means of P-element mediated germ-line transformation and demonstrate that a 747 bp promoter region is sufficient to direct sex-specific expression in the female fat body and both the temporal- and cell-type-specificity of expression during oogenesis. Two elements that independently govern yp3 transcription in these tissues have been separated and no other sequences in the upstream, downstream or coding regions have been identified that are autonomously involved in yp3 expression.
authors.affiliation: Institute of Cell and Molecular Biology, University of Edinburgh.
authors.forename: E
authors.initials: E
authors.lastname: Ronaldson
authors.forename: M
authors.initials: M
authors.lastname: Bownes
mesh_terms: D000818:Animals; D001483:Base Sequence; D029721:Drosophila Proteins; D004331:Drosophila melanogaster / Q000235:genetics / Q000502:physiology*; D004527:Egg Proteins / Q000737:chemistry / Q000235:genetics*; D005216:Fat Body / Q000737:chemistry / Q000502:physiology; D005260:Female; D005786:Gene Expression Regulation; D018507:Gene Expression Regulation, Developmental; D017344:Genes, Insect; D008969:Molecular Sequence Data; D010053:Ovary / Q000737:chemistry / Q000502:physiology; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic; D012045:Regulatory Sequences, Nucleic Acid; D012689:Sequence Homology, Nucleic Acid; D012727:Sex Characteristics; D014158:Transcription, Genetic
chemical_list: D029721:Drosophila Proteins; D004527:Egg Proteins; C070799:YP3 protein, Drosophila