title: Identification of ovarian enhancer-binding factors which bind to ovarian enhancer 1 of the Drosophila genes yp1 and yp2.
abstract: It has been reported that three different DNA regions-the fat body enhancer and ovarian enhancers 1 and 2-direct the tissue-specific expression of yp1 and yp2 in Drosophila melanogaster. In the present study, we identified ovarian enhancer 1-specific binding proteins. Electrophoretic mobility shift assay revealed that these proteins are present in the adult ovary, but not in adult testis or fat body. Southwestern blot analysis showed that about 130 kDa and 40 kDa proteins, designated OEF1 and OEF2, respectively, from ovarian nuclear or crude extracts bind specifically to the ovarian enhancer 1. The two proteins were partially purified by streptavidin/agarose-DNA affinity chromatography, and their binding activity was confirmed by electrophoretic mobility shift assay. These ovarian enhancer factors may play an important role in the regulation of transcription of yp1 and yp2 in the ovary.
authors.affiliation: Department of Molecular Biology, Seoul National University, Korea.
authors.forename: Y D
authors.initials: YD
authors.lastname: Chung
authors.forename: H C
authors.initials: HC
authors.lastname: Kwon
authors.forename: K W
authors.initials: KW
authors.lastname: Chung
authors.forename: S J
authors.initials: SJ
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Kim
authors.forename: C C
authors.initials: CC
authors.lastname: Lee
mesh_terms: D000818:Animals; D001667:Binding, Competitive; D002457:Cell Extracts; D002467:Cell Nucleus / Q000378:metabolism; D004247:DNA / Q000378:metabolism; D004268:DNA-Binding Proteins / Q000737:chemistry / Q000302:isolation & purification* / Q000378:metabolism; D004331:Drosophila melanogaster / Q000235:genetics*; D004527:Egg Proteins / Q000235:genetics*; D004742:Enhancer Elements, Genetic; D005260:Female; D005786:Gene Expression Regulation / Q000502:physiology; D017344:Genes, Insect; D008970:Molecular Weight; D009928:Organ Specificity; D010053:Ovary / Q000737:chemistry* / Q000502:physiology
chemical_list: D002457:Cell Extracts; D004268:DNA-Binding Proteins; D004527:Egg Proteins; D004247:DNA