Comparison of 2-Aminopyridine and 4-Thiopseudisocytosine PNA Nucleobases for Hoogsteen Recognition of Guanosine in RNA
Ilze Kumpina,
Mohammed Loubidi,
Eriks Rozners
Abstract:Peptide nucleic acid
(PNA) is emerging as a promising ligand for
triple-helical recognition of folded biologically relevant RNA. Chemical
modifications are actively being developed to achieve high affinity
and sequence specificity under physiological conditions. In this study,
we compared two modified PNA nucleobases, 2-aminopyridine (M) and
4-thiopseudisocytosine (L), as alternatives to protonated cytosine
(unfavorable under physiological conditions), to form more stable
triplets than C+·G-C. Both nucleobases… Show more
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