Synthesis and properties of nicked dumbbell and dumbbell DNA conjugates having stilbenedicarboxamide linkers

Ligang Zhang, Hai Long, George C Schatz, Frederick D. Lewis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

The synthesis and properties of nicked dumbbell and dumbbell DNA conjugates having A-tract base pair domains connected by rod-like stilbenedicarboxamide linkers are reported. The nicked dumbbells have one to eight dA-dT base pairs and are missing a sugar-phosphate bond either between the linker and a thymine nucleoside residue or between two thymine residues. Chemical ligation of all of the nicked dumbbells with cyanogen bromide affords the dumbbell conjugates in good yield, providing the smallest mini-dumbbells prepared to date. The dumbbells have exceptionally high thermal stability, whereas the nicked dumbbells are only marginally more stable than the hairpin structures on either side of the nick. The structures of the nicked dumbbells and dumbbells have been investigated using a combination of circular dichroism spectroscopy and molecular modeling. The base pair domains are found to adopt normal B′-DNA geometry and thus provide a helical ruler for studies of the distance and angular dependence of electronic interactions between the chromophore linkers.

Original languageEnglish
Pages (from-to)450-456
Number of pages7
JournalOrganic and Biomolecular Chemistry
Volume5
Issue number3
DOIs
Publication statusPublished - 2007

Fingerprint

Thymine
Base Pairing
thymine
deoxyribonucleic acid
Sugar Phosphates
B-Form DNA
Circular dichroism spectroscopy
Cyanogen Bromide
Molecular modeling
DNA
synthesis
Chromophores
Nucleosides
cyanogen
nucleosides
Thermodynamic stability
sugars
Circular Dichroism
chromophores
dichroism

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Chemistry(all)

Cite this

Synthesis and properties of nicked dumbbell and dumbbell DNA conjugates having stilbenedicarboxamide linkers. / Zhang, Ligang; Long, Hai; Schatz, George C; Lewis, Frederick D.

In: Organic and Biomolecular Chemistry, Vol. 5, No. 3, 2007, p. 450-456.

Research output: Contribution to journalArticle

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