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  • Title: Joining of synthetic ribotrinucleotides with defined sequences catalyzed by T4 RNA ligase.
    Author: Ohtsuka E, Nishikawa S, Fukumoto R, Tanaka S, Markham AF.
    Journal: Eur J Biochem; 1977 Dec 01; 81(2):285-91. PubMed ID: 598370.
    Abstract:
    RNA ligase catalyzed the joining of pC-C-Ap with C-A-A in the synthesis of C-A-A-C-C-Ap, which has the sequence of the Escherichia coli tRNAfMet 3'-end. pC-C-A was also shown to be joined to C-A-A without any undesired self-polymerization. Joining of pC-C-A to various synthetic ribotriplets, such as C-C-A, A-A-A, C-C-C, U-U-U, U-A-G, C-C-G and U-U-C, was performed as well as joining to the partially substituted trimers with a photolabile o-nitrobenzyl group, C-Anbzl-A and C-C-Anbzl. The yields were C-A-A-C-C-A (69%), C-C-A-C-C-A (38%), A-A-A-C-C-A (66%), C-C-C-C-C-A (71%), U-U-U-C-C-A (50%), U-A-G-C-C-A (23%), C-C-G-C-C-A (43%) and U-U-C-C-C-A (46%). C-Anbzl-A was a slightly poorer acceptor than C-A-A and C-C-Anbzl did not serve as an acceptor. Recognition of acceptor molecules by RNA ligase is discussed in terms of affinity of oligonucleotides for the enzyme.
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