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A simple procedure for isolation of eukaryotic mRNA polyadenylation factors
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: European Journal of Biochemistry, ISSN 0014-2956, E-ISSN 1432-1033, Vol. 202, no 3, 765-773 p.Article in journal (Refereed) Published
Abstract [en]

We have devised a simple chromatographic procedure which isolates five polyadenylation factors that are required for polyadenylation of eukaryotic mRNA. The factors were separated from each other by fractionation of HeLa cell nuclear extract in two consecutive chromatographic steps. RNA cleavage at the L3 polyadenylation site of human adenovirus 2 required at least four factors. Addition of adenosine residues required only two of these factors. The fractionation procedure separates two components that are both likely to be poly(A) polymerases. The candidate poly(A) polymerases were interchangeable and participated during both RNA cleavage and adenosine addition. They were discriminated from each other by chromatographic properties, heat sensitivity and divalent cation requirement. We have compared our data with published information and have been able to correlate the activities that we have isolated to previously identified polyadenylation factors. However, we have not been able to assign one of the candidate poly(A) polymerases to a previously identified poly(A) polymerase. This simple fractionation procedure can be used for generating an in vitro reconstituted system for polyadenylation within a short period of time.

Place, publisher, year, edition, pages
1991. Vol. 202, no 3, 765-773 p.
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Medical Genetics
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URN: urn:nbn:se:uu:diva-106240DOI: 10.1111/j.1432-1033.1991.tb16431.xPubMedID: 1684936OAI: oai:DiVA.org:uu-106240DiVA: diva2:224298
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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