Imidazolo-dC Metal-Mediated Base Pairs: Purine Nucleosides Capture Two Ag+ Ions and Form a Duplex with the Stability of a Covalent DNA Cross-Link

Autor(en): Mei, Hui
Ingale, Sachin A.
Seela, Frank
Stichwörter: ACID; BINDING; Chemistry; Chemistry, Multidisciplinary; CRYSTAL-STRUCTURE; DNA; NUCLEOBASES; nucleosides; NUCLEOTIDES; OLIGONUCLEOTIDES; PARALLEL; POLYMERASE RECOGNITION; silver
Erscheinungsdatum: 2014
Herausgeber: WILEY-V C H VERLAG GMBH
Journal: CHEMISTRY-A EUROPEAN JOURNAL
Volumen: 20
Ausgabe: 49
Startseite: 16248
Seitenende: 16257
Zusammenfassung: 
8-Phenylimidazolo-dC ((ph)ImidC, 2) forms metal-mediated DNA base pairs by entrapping two silver ions. To this end, the fluorescent purine 2-deoxyribonucleoside 2 has been synthesised and converted into the phosphoramidite 6. Owing to the ease of nucleobase deprotonation, the new Ag+-mediated base pair containing a purine skeleton is much stronger than that derived from the pyrrolo- [3,4-d]pyrimidine system ((ph)PyrdC, 1). The silver-mediated (ph)ImidC-(ph)ImidC base pair fits well into the DNA double helix and has the stability of a covalent cross-link. The formation of such artificial metal base pairs might not be limited to DNA but may be applicable to other nucleic acids such as RNA, PNA and GNA as well as other biopolymers.
ISSN: 09476539
DOI: 10.1002/chem.201404422

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