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In vitro deadenylation of mammalian mRNA by a HeLa cell 3' exonuclease
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology, Medical Genetics.
Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology, Medical Genetics.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology. Uppsala University, Disciplinary Domain of Medicine and Pharmacy, Faculty of Medicine, Department of Genetics and Pathology, Medical Genetics.
1991 (English)In: EMBO Journal, ISSN 0261-4189, E-ISSN 1460-2075, Vol. 10, no 10, 3067-3071 p.Article in journal (Refereed) Published
Abstract [en]

We have identified a 3' exonuclease in HeLa cell extracts which deadenylates mammalian mRNA and leaves the mRNA body intact after poly(A) removal. Only homopolymeric adenosine tails located at the 3' end were efficiently removed by the exonuclease. The poly(A) removing activity did not require any specific sequences in the mRNA body either for poly(A) removal or for accumulation of the deadenylated mRNA. We conclude that the poly(A) removing activity is a 3' exonuclease since (i) reaction intermediates gradually lose the poly(A) tail, (ii) degradation is prevented by the presence of a cordycepin residue at the 3' end and (iii) RNAs having internally located poly(A) stretches are poor substrates for degradation. The possible involvement of the poly(A) removing enzyme in regulating mRNA translation and stability is discussed.

Place, publisher, year, edition, pages
1991. Vol. 10, no 10, 3067-3071 p.
National Category
Medical Genetics
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URN: urn:nbn:se:uu:diva-106241PubMedID: 1717259OAI: oai:DiVA.org:uu-106241DiVA: diva2:224299
Available from: 2009-06-17 Created: 2009-06-17 Last updated: 2017-12-13Bibliographically approved

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Åström, JonasVirtanen, Anders

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