Photo-Tethers for the (Multi-)Cyclic, Conformational Caging of Long Oligonucleotides.
Angew Chem Int Ed Engl
; 56(1): 359-363, 2017 01 02.
Article
em En
| MEDLINE
| ID: mdl-27897376
ABSTRACT
Intramolecular circularization of DNA oligonucleotides was accomplished by incorporation of alkyne-modified photolabile nucleosides into DNA sequences, followed by a CuI -catalyzed alkyne-azide cycloaddition with bis-azido linker molecules. We determined a range of ring sizes, in which the caged circular oligonucleotides exhibit superior duplex destabilizing properties. Specific binding of a full-length 90 nt C10 aptamer recognizing human Burkitt's lymphoma cells was then temporarily inhibited by locking the aptamer in a bicircularized structure. Irradiation restored the native aptamer conformation resulting in efficient cell binding and uptake. The photo-tether strategy presented here provides a robust and versatile tool for the light-activation of longer functional oligonucleotides, noteworthy without prior knowledge on the structure and the importance of specific nucleotides within a DNA aptamer.
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Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Assunto principal:
Oligonucleotídeos
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Alemanha