Kumar YP, Das RN, Kumar S, Schütte OM, Steinem C, Dash J. Triazole-tailored guanosine dinucleosides as biomimetic ion channels to modulate transmembrane potential.
Chemistry 2014;
20:3023-8. [PMID:
24677317 DOI:
10.1002/chem.201304530]
[Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/17/2014] [Indexed: 11/09/2022]
Abstract
A “click” ion channel platform has been established by employing a clickable guanosine azide or alkyne with covalent spacers. The resulting guanosine derivatives modulated the traffic of ions across the phospholipid bilayer, exhibiting a variation in conductance spanning three orders of magnitude (pS to nS). Förster resonance energy transfer studies of the dansyl fluorophore with the membrane binding fluorophore Nile red revealed that the dansyl fluorophore is deeply embedded in the phospholipid bilayer. Complementary cytosine can inhibit the conductance of the supramolecular guanosine channels in the phospholipid bilayers.
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