Lo ATS, Salam NK, Hibbs DE, Rutledge PJ, Todd MH. Polyamide-scorpion cyclam lexitropsins selectively bind AT-rich DNA independently of the nature of the coordinated metal.
PLoS One 2011;
6:e17446. [PMID:
21573061 PMCID:
PMC3090394 DOI:
10.1371/journal.pone.0017446]
[Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Accepted: 02/03/2011] [Indexed: 01/17/2023] Open
Abstract
Cyclam was attached to 1-, 2- and 3-pyrrole lexitropsins for the first time through a synthetically facile copper-catalyzed "click" reaction. The corresponding copper and zinc complexes were synthesized and characterized. The ligand and its complexes bound AT-rich DNA selectively over GC-rich DNA, and the thermodynamic profile of the binding was evaluated by isothermal titration calorimetry. The metal, encapsulated in a scorpion azamacrocyclic complex, did not affect the binding, which was dominated by the organic tail.
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