Addition by ATP: RNA adenylyltransferase from Escherichia coli of 3'-linked oligo(A) to bacteriophage Qbeta RNA and its effect on RNA replication
- PMID: 788787
- DOI: 10.1016/0005-2787(76)90055-1
Addition by ATP: RNA adenylyltransferase from Escherichia coli of 3'-linked oligo(A) to bacteriophage Qbeta RNA and its effect on RNA replication
Abstract
An oligo(A) or poly(A) segment was added in a stepwise fashion to the 3'-end of bacteriophage Qbeta-RNA with the aid of ATP : RNA adenylyltransferase from Escherichia coli. Nearly all RNA molecules, present in the reaction mixture, could be polyadenylated. For tail lengths not exceeding 200 nucleotide residues, the physical properties of Qbeta-RNA-poly(A) were found to be only slightly different from those of the original RNA. The polyadenylated RNA was purifed by affinity chromatography. The properties of Qbeta-RNA with oligo(A) tails of different average lengths were investigated in the in vitro replication reaction. Almost complete abolishment of template activity, even by short oligo(A) stretches, was found. Furthermore, polyadenylated Qbeta-RNA inhibited the normal replication reaction of Qbeta-RNA by removal of host factor HFI, in the same way as does free poly(A).
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