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Science. 1991 Dec 6;254(5037):1497-500.

Sequence-selective recognition of DNA by strand displacement with a thymine-substituted polyamide.

Author information

  • 1Department of Biochemistry B, Panum Institute, Copenhagen, Denmark.

Abstract

A polyamide nucleic acid (PNA) was designed by detaching the deoxyribose phosphate backbone of DNA in a computer model and replacing it with an achiral polyamide backbone. On the basis of this model, oligomers consisting of thymine-linked aminoethylglycyl units were prepared. These oligomers recognize their complementary target in double-stranded DNA by strand displacement. The displacement is made possible by the extraordinarily high stability of the PNA-DNA hybrids. The results show that the backbone of DNA can be replaced by a polyamide, with the resulting oligomer retaining base-specific hybridization.

PMID:
1962210
[PubMed - indexed for MEDLINE]
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