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. 1993 Mar 25;21(6):1403–1408. doi: 10.1093/nar/21.6.1403

Template controlled coupling and recombination of oligonucleotide blocks containing thiophosphoryl groups.

S M Gryaznov 1, R L Letsinger 1
PMCID: PMC309325  PMID: 8464731

Abstract

Oxidation of a pair of 3'- and 5'-thiophosphoryloligonucleotides in the presence of a complementary oligonucleotide template is shown to provide an effective means for selectively linking oligonucleotide blocks. Coupling proceeds rapidly and efficiently under mild conditions in dilute aqueous solutions (microM range for oligomers, 2-15 min at 0-4 degrees C with K3Fe(CN)6 or KI3 as oxidant). This chemistry was demonstrated by polymerization of a thymidylate decamer derivative (sTTTTTTTTTTs) in the presence of poly(dA) and by coupling oligomers possessing terminal thiophosphoryl groups (ACACCCAATTs + sCTGAAAATGG and ACACCCAATs + sCTGAAAATGG) in the presence of a template (CCATTTTCAGAATTGGGTGT). Efficient linking of 5' to 3' phosphoryl groups can be achieved under conditions where virtually no coupling takes place in absence of a template. A novel feature of the chemistry is that catalyzed recombinations of oligomers containing internal -OP(O)(O-)SSP(O)(O-)O- linkages can be directed by hydrogen bonding to a complementary oligonucleotide. Convenient procedures are reported for solid phase synthesis of the requisite oligonucleotide 3'- and 5'-phosphorothioates.

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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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