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Träfflista för sökning "WFRF:(Walsh J.) srt2:(1995-1999)"

Sökning: WFRF:(Walsh J.) > (1995-1999)

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  • Miller, S J, et al. (författare)
  • A novel type of regulatory element is required for promoter-specific activity of the PDGF-B intronic enhancer region.
  • 1998
  • Ingår i: Growth Factors. - 0897-7194 .- 1029-2292. ; 16:2, s. 137-51
  • Tidskriftsartikel (refereegranskat)abstract
    • We have previously described a non-classical, promoter-specific enhancer for the human Platelet-Derived Growth Factor B (PDGF-B) gene. In JEG-3 choriocarcinoma cells the activity of the enhancer depends upon co-operation with a sequence (the Enhancer-Dependent cis Co-activator "EDC" element) within the promoter. The PDGF-B enhancer fails to activate heterologous promoters, indicating that promoter-specificity depends on an element within the enhancer that can recognise a target sequence within the promoter. Here we identify a sequence within the enhancer of the PDGF-B gene which directs activation of the PDGF-B promoter by distal cis-acting elements. This specifies the wild-type PDGF-B promoter as the target for the enhancer and has been designated the EDC specificity element (EDCse). The cell-type specific nature of this interaction is extended by the observation that the EDCse is also dispensable for enhancer activity in breast-cancer cells (ZR-75). Concomitant to this observation, JEG-3 and ZR-75 cells differ in the binding of nuclear factors to the EDCse. We discuss the relevance of the EDC/EDCse system in regulation of gene expression.
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