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. 1976 Jun;3(6):1613–1623. doi: 10.1093/nar/3.6.1613

Joining of ribooligonucleotides with T4 RNA ligase and identification of the oligonucleotide-adenylate intermediate.

E Ohtsuka, S Nishikawa, M Sugiura, M Ikehara
PMCID: PMC343018  PMID: 183186

Abstract

T4 RNA ligase was found to join A-A-A-A-A-A and 32pU-U-U-U in the presence of ATP as cofactor. In this reaction the pyrophosphate of pU-U-U-U and pA was isolated by chromatography on a RPC-5 column, besides the joined product and the starting materials. This pyrophosphate was shown to be an intermediate in the joining reaction because of the fact that coupling with A-A-A-A-A-A to give the decanucleotide could be performed in the absence of ATP. The structure of the oligonucleotide-adenylate was determined by enzymatic digestion with base-nonspecific nuclease and venom phosphodiesterase. Futher evidence for the proposed structure was obtained by isolation of the intermediate obtained by using pU-U-U-U and [alpha-32p]ATP. This pyrophosphate gave pA and pU by treatment with venom phosphodiesterase. Several other joining reactions between various purine- and pyrimidine ribooligonucleotides to 5'-phosphorylated ribooligonucleotides are discussed.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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