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- W2068932727 abstract "Polyamines are essential cell constituents involved in growth processes. In Caenorhabditis elegans the polyamine synthetic pathway consists of three enzymes, ornithine decarboxylase (ODC), S-adenosylmethionine decarboxylase (AdoMetDC) and spermidine synthase. Their gene expression pattern was determined in C. elegans by microinjection of green fluorescent protein (GFP) reporter gene constructs. All transgenic animals exhibited GFP expression in their intestinal cells. For the AdoMetDC promoter, fluorescence was additionally observed in dopaminergic neurons, while the ODC promoter also drives a male-specific GFP expression in the distal part of the reproductive system. The minimal promoter regions for intestine-specific expression of the AdoMetDC and spermidine synthase genes were determined by deletion mutants. Using the Seqcomp and Family Relation programs, a similar arrangement of putative cis-regulatory elements within these regions and also within the respective regions of the orthologous Caenorhabditis briggsae genes were found. The functional conservation of the latter was confirmed by heterologous transformation experiments. Moreover, the involvement of putative GATA- and initiator-(Inr)-like-elements in gene expression was determined by mutagenesis studies. RNase protection assay revealed that the Inr-like-element does not represent the main transcriptional start site, at least of C. elegans spermidine synthase. In conclusion, a similar minimal promoter architecture was found for C. elegans as well as C. briggsae AdoMetDC and spermidine synthase, two genes that participate in the same metabolic pathway." @default.
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- W2068932727 date "2004-01-01" @default.
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- W2068932727 title "Functional GATA- and initiator-like-elements exhibit a similar arrangement in the promoters of Caenorhabditis elegans polyamine synthesis enzymes" @default.
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- W2068932727 doi "https://doi.org/10.1515/bc.2004.087" @default.
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