In vivo transcriptional analysis of the TATA-less promoter of the Drosophila melanogaster vermilion gene.
AUTOR(ES)
Fridell, Y W
RESUMO
Transcriptional regulation of the TATA-less promoter of the Drosophila melanogaster vermilion (v) gene was investigated. Developmental Northern (RNA) blot analysis showed that v transcripts accumulate during late embryo, larval, and adult stages. Sequences that control expression in adults were delineated by analyzing a series of 5' and 3' deletion constructions after germ line transformation. These studies defined two regions, -300 to -600 and -60 to -160, relative to the major transcription start site, as important for maximal levels of expression. Analysis of transformants bearing v-lacZ promoter fusions showed that larval expression is fat body specific and that expression depends on sequences located between +19 and +36 downstream of transcription start site. This downstream element can be functionally replaced by a TATA box in vivo. Furthermore, when added to the wild-type v promoter, a TATA element augments the level of v transcription by three- to fivefold.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=360384Documentos Relacionados
- Characterization of the TATA-less core promoter of the cell cycle-regulated cdc25C gene.
- Lack of an initiator element is responsible for multiple transcriptional initiation sites of the TATA-less mouse thymidylate synthase promoter.
- Sp1 activation of a TATA-less promoter requires a species-specific interaction involving transcription factor IID.
- Sp1 is essential for both enhancer-mediated and basal activation of the TATA-less human adenosine deaminase promoter.
- TATA-binding protein-associated factor(s) in TFIID function through the initiator to direct basal transcription from a TATA-less class II promoter.