6533b85bfe1ef96bd12bad2f
RESEARCH PRODUCT
Aza-macrocyclic triphenylamine ligands for G-quadruplex recognition
Matthew ReynoldsEstefanía Delgado‐pinarJorge González-garcíaJorge González-garcíaIsabel PontIsabel PontRamon VilarEnrique García-españaM. Teresa AlbeldaMario Inclánsubject
0301 basic medicineCircular dichroismaggregation-induced emissionChemistry Multidisciplinaryamines010402 general chemistryG-quadruplexTriphenylamine01 natural sciencesCatalysisCIRCULAR-DICHROISM03 medical and health scienceschemistry.chemical_compoundGeneral chemistryfluorescent probestriphenylamine polyaminesMoleculeSpectroscopyFLUORESCENT-PROBESScience & TechnologyG-quadruplexChemistryINTRAMOLECULAR CHARGE-TRANSFERANTICANCER DRUG DESIGNOrganic ChemistryaggregationFORMING REGIONDNAGeneral ChemistryFluorescenceG-quadruplexes0104 chemical sciencesCrystallographyChemistry030104 developmental biologyFörster resonance energy transfer2-PHOTON ABSORPTIONPROMOTER REGIONPhysical SciencesEQUILIBRIUM-CONSTANTSGRAPHENE OXIDE03 Chemical Sciencesmacrocyclic ligandsdescription
A new series of triphenylamine-based ligands with one (TPA1PY), two (TPA2PY) or three pendant aza-macrocycle(s) (TPA3PY) has been synthesised and studied by means of pH-metric titrations, UV/Vis spectroscopy and fluorescence experiments. The affinity of these ligands for G-quadruplex (G4) DNA and the selectivity they show for G4s over duplex DNA were investigated by Forster resonance energy transfer (FRET) melting assays, fluorimetric titrations and circular dichroism spectroscopy. Interestingly, the interactions of the bi- and especially the tri-branched ligands with G4s lead to a very intense redshifted fluorescence emission band that may be associated with intermolecular aggregation between the molecule and DNA. This light-up effect allows the application of the ligands as fluorescence probes to selectively detect G4s.
year | journal | country | edition | language |
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2018-04-25 |