Detection of secondary structures in 17-mer Ru(ii )-labeled single-stranded oligonucleotides from luminescence lifetime studies
| Autor: | A. Kirsch-De Mesmaeker, Eric Defrancq, Olivier Lentzen, Isabelle Ortmans, David García-Fresnadillo |
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| Rok vydání: | 2005 |
| Předmět: |
Models
Molecular Luminescence Oligonucleotide Intercalation (chemistry) Oligonucleotides Analytical chemistry DNA Single-Stranded chemistry.chemical_element Sequence (biology) Ruthenium Inorganic Chemistry Crystallography chemistry Single stranded oligonucleotides Nucleic Acid Conformation Quenching rate Phenanthrolines Metallic bonding |
| Zdroj: | Europe PubMed Central |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/b415898a |
| Popis: | The emission properties of a non intercalating complex, [Ru(TAP)2(dip)]2+ (TAP = 1,4,5,8-tetraazaphenanthrene; dip = 4,7-diphenyl-1,10-phenanthroline), tethered to 17-mer single-stranded oligodeoxyribonucleotides (ODNs) either in the middle or at the 5'-end of the sequence, are determined. The results highlight the fact that the luminescence of this metallic compound is sufficiently sensitive to its microenvironment to probe self-structuration of these short single-stranded ODNs. It is shown that the weighted averaged emission lifetimes (tau(M)) along with the quenching rate constants of luminescence by oxygen reflect particularly well different structures adopted by the different ODNs sequences. The determination of these parameters thus offers an elegant way to examine possible structurations of synthetic single-stranded ODNs that play important roles in biological applications. |
| Databáze: | OpenAIRE |
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