ABSTRACT
A nucleobase-caged peptide nucleic acid (PNA) having a (6-bromo-7-methoxycoumarin)-4-ylmethoxycarbonyl (Bmcmoc) caging group was newly synthesized. The Bmcmoc-caged PNAs were photolyzed to produce parent PNAs with a high photochemical efficiency. Introduction of a single Bmcmoc group was sufficient to suppress polymerase chain reaction (PCR) clamping activity and triplex invasion complex formation. Photo-mediated restoration of the PCR clamping activity was also demonstrated.
Subject(s)
Coumarins/chemistry , Peptide Nucleic Acids/chemical synthesis , Pyrimidines/chemistry , Electrophoresis, Agar Gel , Light , Peptide Nucleic Acids/chemistry , Photolysis , Polymerase Chain ReactionABSTRACT
Synthesis and photochemical properties of new photoremovable protecting groups for nucleobases are described. Four caged 2'-deoxycytidines (dCs) were synthesized, and their photochemical properties were measured under simulated physiological conditions. Two new coumarin-caged dCs show better photochemical and photophysical properties than those of the caged dCs having previously reported caging groups.
