Da. Barawkar et Tc. Bruice, SYNTHESIS, BIOPHYSICAL PROPERTIES, AND NUCLEASE RESISTANCE PROPERTIESOF MIRED BACKBONE OLIGODEOXYNUCLEOTIDES CONTAINING CATIONIC INTERNUCLEOSIDE GUANIDINIUM LINKAGES - DEOXYNUCLEIC GUANIDINE DNA CHIMERAS/, Proceedings of the National Academy of Sciences of the United Statesof America, 95(19), 1998, pp. 11047-11052
The synthesis of mixed backbone oligodeoxynucleotides (18-mers) consis
ting of positively charged guanidinium linkages along with negatively
charged phosphodiester linkages is carried out. The use of a base labi
le-protecting group for guanidinium linkage offers a synthetic strateg
y similar to standard oligonucleotide synthesis. The nuclease resistan
ce of the oligodeoxyribonucleotides capped with guanidinium linkages a
t 5' and 3' ends are reported. The hybridization properties and sequen
ce specificity of binding of these deoxynucleic guanidine/DNA chimeras
with complementary DNA or RNA are described.