中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
N-苯甲酰基-3’-O-(4,4’-二甲氧基三苯甲基)-2’-脱氧腺苷 | N-benzoyl-3'-O-[bis(4-methoxyphenyl)(phenyl)methyl]-2'-deoxyadenosine | 140712-79-4 | C38H35N5O6 | 657.726 |
N-苯甲酰基-2’-脱氧腺苷 | N6-benzoyl-2'-deoxyadenosine | 4546-72-9 | C17H17N5O4 | 355.353 |
A porphycene with a hydroxyethyl side chain was coupled to the 3′-terminus of an oligodeoxynucleotide via solid-phase synthesis. The resulting porphycene-DNA hybrid binds to a complementary region of a DNA target strand with greater affinity than the unmodified control oligonucleotide, resulting in an increase of the UV-melting point of 12.7 °C. Duplex formation is accompanied by an increase in porphycene fluorescence at 640 nm by 18%. When a tetrakis(p-hydroxyphenyl)porphyrin appended to the 5′-terminus of another DNA-strand is brought into close proximity of the porphycene by hybridizing it to the downstream-region of the template strand, 94% of the porphycene fluorescence is quenched. By quenching each others fluorescence to different degrees, porphycene and porphyrin, together, report on local DNA structure in a fashion reminiscent of that of molecular beacons. The introduction of porphycenes and the porphycene-porphyrin "two hybrid system'' to DNA-based structuring may open up new avenues to designed functional materials.