Synthesis and properties of oligonucleotides containing aminodeoxythymidine units
- PMID: 1630911
- PMCID: PMC312496
- DOI: 10.1093/nar/20.13.3403
Synthesis and properties of oligonucleotides containing aminodeoxythymidine units
Abstract
Procedures are described for synthesis via solid support methodology of oligonucleotide analogues derived in part from 3'-amino-3'-deoxythymidine or 5'-amino-5'-deoxythymidine. Oligothymidylate decamers terminated with a 3'-amino group or containing a 3'-NHP(O)(O-)O-5' internucleoside link are found to form unusually stable complexes with poly(dA), poly(A), and oligo(dA). For related derivatives of 5'-amino-5'-deoxythymidine enhancement is less or absent, and in the case of multiple substitution destabilization of the heteroduplex may be observed. That the effect of the 3'-amino group is general for oligonucleotide derivatives is indicated by enhanced Tm values for heteroduplex complexes of the mixed-base oligomer, d(TATTCAGTCAT(NH2)), and the methyl phosphonate derivatives, TmTmTmTmTmTmTmTmTmT(NH2) and d(TmAmTmTmCmAmGmTmCmAmT(NH2)).
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