Synthesis, binding and fluorescence properties of oligonucleotide derivatives having a dansyl fluorescence label attached to the 2′-position of a ribonucleoside
作者:Kazushige Yamana、Yoshihito Ohashi、Kenji Nunota、Hidehiko Nakano
DOI:10.1016/s0040-4020(97)00131-2
日期:1997.3
Oligonucleotide derivatives having a dansyl fluorescence label at the 2'-position of a ribonucleoside have been synthesized by using 5'-dimethoxytrityl 2'-(dansylamino)uridine 3'-phosphorobisdethylamidie. The oligonucleotide containing a dansyl-modified uridine at the 5'-terminal position exhibits normal binding affinity for a complementary DNA segment in an aqueous buffer solution (pH 7.0). A significant increase in fluorescence intensity and blue-shift of the emission maximum were observed for dansyl-modified oligonucleotide upon binding to DNA. The fluorescence increase upon binding of dansyl-modified oligonucleotide to the target DNA was found to be sensitive to base mismatch in the DNA sequence. (C) 1997 Elsevier Science Ltd.