Oligonucleotides containing a peptide internucleotide linkage. A novel class of modified oligonucleotides
作者:A. M. Varizhuk、S. V. Kochetkova、N. A. Kolganova、E. N. Timofeev、V. L. Florentiev
DOI:10.1134/s1068162010040138
日期:2010.7
Oligonucleotide analogues containing one or a few glycine, L-, and D-alanine residues instead of phosphodiester internucleotide linkages were synthesized (C3'-NH-C(O)-CH(X)-NH-C(O)-C4', where X = H, (S)-CH3, and (R)-CH3. The stability of the duplexes of modified oligonucleotides with their wild-type complements was studied. The incorporation of glycine and L-alanine residues into internucleotide linkages was shown to noticeably decrease the stability of modified duplexes as compared to that of native ones (Delta T (m similar to)a'2A degrees C per modification), whereas analogues containing D-alanine linkers form duplexes with increased stability (Delta T (m similar to)+2A degrees C per modification).