Linked Life Data

8915529

Source:http://linkedlifedata.com/resource/pubmed/id/8915529

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pubmed-article:8915529pubmed:abstractTextThe metabolism of the poly(A) tail is a process important for the translational regulation of maternal mRNAs in Xenopus laevis oocytes and early embryos. Two poly(A) nuclease (PAN) activities have been described in Xenopus embryo or activated egg extracts (Legagneux et al (1995) RNA 1, 1001-1008). These activities (default PAN and EgPAN) are distinguishable by their deadenylation kinetics and their substrate specificities. In this report, we show that these activities display different sensitivities to biochemical treatments. Urea and, to a lesser extent, spermidine, inhibit EgPAN at concentrations which have no effect on default PAN. Heparin activates default PAN but inhibits EgPAN. When extracts are fractionated by ultracentrifugation, the default activity is recovered in one unique fraction, whereas two fractions must be combined to reconstitute the EgPAN activity. Moreover, these two deadenylation activities are separable by size exclusion chromatography under native conditions. We conclude that these two deadenylation activities are mediated by two protein complexes.lld:pubmed
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pubmed-article:8915529pubmed:pagination399-407lld:pubmed
pubmed-article:8915529pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:8915529pubmed:year1996lld:pubmed
pubmed-article:8915529pubmed:articleTitlePoly(A) metabolism in Xenopus laevis embryos: substrate-specific and default poly(A) nuclease activities are mediated by two distinct complexes.lld:pubmed
pubmed-article:8915529pubmed:affiliationBiologie et Génétique du Développement, CNRS UPR 41, Université de Rennes 1, France.lld:pubmed
pubmed-article:8915529pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:8915529pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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