Abstract
Synthesis of a lanthanide-binding peptide (LBP) for the detection of double-stranded DNA is presented. A proflavine moiety was introduced into a high affinity LBP involving two unnatural chelating amino acids in the Ln ion coordination. The Eu(3+)-LBP complex is demonstrated to bind to ct-DNA and to sensitize Eu luminescence. The DNA binding process is effectively detected via the Eu-centered luminescence thanks to the intimate coupling between the LBP scaffold and DNA intercalating unit.
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