Novel photoresponsive cross-linking oligodeoxyribonucleotides having a caged α-chloroaldehyde
摘要:
We have developed photoresponsive cross-linking oligodeoxyribonucleotides (ODNs) for sequence-selective interstrand covalent bond formation toward target nucleotides. A phosphoramidite derivative of alpha-chloroaldehyde whose carbonyl group was converted to a bis(2-nitrobenzyl)acetal group was prepared for the synthesis of photoresponsive alpha-chloroaldehyde (PCA)-conjugated ODN. The bis(2-nitrobenzyl)acetal group of a PCA-thymidine conjugate was completely removed by UV irradiation at 365 nm (400 mW/cm(2)) for 1 min. Photo-cross-linking studies revealed that PCA-ODN selectively reacted with the target nucleotides having an adenine or a cytosine moiety at the frontal position of the alpha-chloroaldehyde group. (C) 2012 Elsevier Ltd. All rights reserved.
Novel photoresponsive cross-linking oligodeoxyribonucleotides having a caged α-chloroaldehyde
摘要:
We have developed photoresponsive cross-linking oligodeoxyribonucleotides (ODNs) for sequence-selective interstrand covalent bond formation toward target nucleotides. A phosphoramidite derivative of alpha-chloroaldehyde whose carbonyl group was converted to a bis(2-nitrobenzyl)acetal group was prepared for the synthesis of photoresponsive alpha-chloroaldehyde (PCA)-conjugated ODN. The bis(2-nitrobenzyl)acetal group of a PCA-thymidine conjugate was completely removed by UV irradiation at 365 nm (400 mW/cm(2)) for 1 min. Photo-cross-linking studies revealed that PCA-ODN selectively reacted with the target nucleotides having an adenine or a cytosine moiety at the frontal position of the alpha-chloroaldehyde group. (C) 2012 Elsevier Ltd. All rights reserved.