Nucleic Acids Research, Vol 25, Issue 23 4771-4777, Copyright © 1997 by Oxford University Press
RS Coleman and RM Pires
Full details of the template-directed covalent cross-linking of duplex
oligodeoxynucleotides are presented. 4-Thio-2'-deoxyuridine was
incorporated synthetically into a 17mer oligodeoxynucleotide, and the
thiocarbonyl group of the modified base was alkylated with a variety of
alpha-bromoacetyl-derivatized diamines. Covalent cross-linking was
initiated by annealing the electrophilic probe oligomers with their
complementary sequences, where a dG base was targeted at the position
complementary to the modified 4-thio-2'-deoxyuridine. The sequence
selectivity of cross-link formation as a function of tether topology and
rigidity was examined, and the thermal stability of the modified duplexes
was measured by UV melting experiments.
ARTICLES
Covalent cross-linking of duplex DNA using 4-thio-2'-deoxyuridine as a readily modifiable platform for introduction of reactive functionality into oligonucleotides
Department of Chemistry, The Ohio State University, 100 West 18th Avenue, Columbus, OH 43210-1185, USA. coleman.184@osu.edu
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