天然核碱基的荧光类似物被广泛用作研究 DNA 杂交和拓扑结构的分子探针。在本研究中,合成了鸟苷类似物 8-乙烯基-和 8-苯乙烯基-2'-脱氧鸟苷,并将其转化为相应的 5'-三磷酸。这些 C8 修饰核苷酸经过各种 DNA 聚合酶处理,产生荧光 DNA。虽然 8-苯乙烯基修饰的核苷酸在一定程度上阻碍了 DNA 合成,但 8-乙烯基-2'-脱氧鸟苷由 DNA 聚合酶加工,强调了作为荧光光谱分子探针的广泛适用性。
Fluorescent analogs of the natural nucleobases are widely used as molecular probes for investigatingDNAhybridization and topology. In this study the guanosine analogs 8-vinyl- and 8-styryl-2′-deoxyguanosine were synthesized and converted into the corresponding 5′-triphosphates. These C8 modified nucleotides were processed by various DNA polymerases to create fluorescentDNA. Whereas the 8-styryl
天然核碱基的荧光类似物被广泛用作研究 DNA 杂交和拓扑结构的分子探针。在本研究中,合成了鸟苷类似物 8-乙烯基-和 8-苯乙烯基-2'-脱氧鸟苷,并将其转化为相应的 5'-三磷酸。这些 C8 修饰核苷酸经过各种 DNA 聚合酶处理,产生荧光 DNA。虽然 8-苯乙烯基修饰的核苷酸在一定程度上阻碍了 DNA 合成,但 8-乙烯基-2'-脱氧鸟苷由 DNA 聚合酶加工,强调了作为荧光光谱分子探针的广泛适用性。
8-Vinyl-2′-deoxyguanosine as a Fluorescent 2′-Deoxyguanosine Mimic for Investigating DNA Hybridization and Topology
A one light strand: 2′‐Deoxyguanosine was made fluorescent by attaching a vinyl group at the C8 position (see structure). The resulting fluorophore is highly sensitive towards DNA double‐strand formation and alterations in the secondary structure of its parent oligonucleotide, such as formation of different quadruplex structures. These differences can be readily detected in the emission spectrum (see