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. 1979 Feb;6(2):443-54.
doi: 10.1093/nar/6.2.443.

A new method for 3'-labelling of polyribonucleotides by phosphorylation with RNA ligase and its application to the 3'-modification for joining reactions

Free PMC article

A new method for 3'-labelling of polyribonucleotides by phosphorylation with RNA ligase and its application to the 3'-modification for joining reactions

E Ohtsuka et al. Nucleic Acids Res. 1979 Feb.
Free PMC article

Abstract

P1-Adenosine 5'-P2-o-nitrobenzyl pyrophosphate (nbzlppA) has been synthesized as a substrate for T4 RNA ligase catalyzed 3'-phosphorylation. Incubation of oligoribonucleotides and nbzlppA with RNA ligase yielded oligoribonucleotides having a 3'-o-(o-nitrobenzyl) phosphate. Photochemical removal of the o-nitrobenzyl group provided the free 3'-phosphate. Using [P2-32P] nbzlppA, 3'-termini of oligoribonucleotides could be labelled with 32P. This reaction was applied to modify the 3'-end of donor molecules in joining reaction with RNA ligase. A trinucleotide U-A-G was converted to U-A-Gpnbzl and phosphorylated with polynucleotide kinase. pU-A-Gpnbzl was then joined to an acceptor trinucleotide A-U-G to yield A-U-G-U-A-Gp.

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