1269759-74-1Relevant articles and documents
Aminomethylene peptide nucleic acid (am -PNA): Synthesis, regio-/stereospecific DNA binding, and differential cell uptake of (α/γ, R / S) am- PNA analogues
Mitra, Roopa,Ganesh, Krishna N.
, p. 5696 - 5704 (2012)
Inherently chiral, cationic am-PNAs having pendant aminomethylene groups at α(R/S) or γ(S) sites on PNA backbone have been synthesized. The modified PNAs are shown to stabilize duplexes with complementary cDNA in a regio- and stereo-preferred manner with γ(S)-am PNA superior to α(R/S)-am PNAs and α(R)-am PNA better than the α(S) isomer. The enhanced stabilization of am-PNA:DNA duplexes is accompanied by a greater discrimination of mismatched bases. This seems to be a combined result of both electrostatic interactions and conformational preorganization of backbone favoring the cDNA binding. The am-PNAs are demonstrated to effectively traverse the cell membrane, localize in the nucleus of HeLa cells, and exhibit low toxicity to cells.
PNAs grafted with (α/γ, R/S)-aminomethylene pendants: Regio and stereo specific effects on DNA binding and improved cell uptake
Mitra, Roopa,Ganesh
, p. 1198 - 1200 (2011/03/20)
PNAs grafted with cationic aminomethylene (am) pendants on the backbone at the glycyl (α) or ethylenediamine (γ) segments show regio (α/γ) and stereochemistry (R/S) dependent binding with complementary DNA. These are efficiently taken up by cells, with γ(S-am) aeg-PNA being the best in all properties.