Alanyl peptide nucleic acids (alanyl-PNAs) are oligomers based on a regular peptide backbone with alternating configuration of the amino acids. All side chains are modified by covalently linked nucleobases. Alanyl-PNAs form very rigid, well defined, and linear doublestrandsbased on hydrogen bonding of complementary strands, stacking, and solvation. Side chain homology was examined by comparing a
Alanyl-PNA homoduplex: A-T pairing with the N7-regioisomer of adenine
作者:Ulf Diederichsen
DOI:10.1016/s0960-894x(97)10210-4
日期:1998.1
The N7-regioisomer of adeninyl alanine can be used as a building block for the synthesis of alanyl-PNA. By changing the nucleobase connectivity from N9 to N7, pairing with the Hoogsteen side is no longer possible and the order of donor/acceptor positions at the Watson-Crick side is reversed. This influences the pairing selectivity but not the stability of alanyl-PNA self-pairing complexes, as shown by UV and CD spectroscopy. (C) 1998 Elsevier Science Ltd. All rights reserved.