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RESEARCH PRODUCT
Forever Young: Structural Stability of Telomeric Guanine Quadruplexes in the Presence of Oxidative DNA Lesions**
Camille CorbierStéphanie GrandemangeTom MiclotTom MiclotCécilia HognonAlessio TerenziAntonio MonariGiampaolo Baronesubject
Circular dichroismTelomeraseOxidative phosphorylation010402 general chemistryImmunofluorescencemedicine.disease_cause01 natural scienceselectronic circular dichroismCatalysis[SPI.AUTO]Engineering Sciences [physics]/Automaticchemistry.chemical_compoundmedicineHumansimmunofluorescenceTelomerasechemistry.chemical_classificationmedicine.diagnostic_test010405 organic chemistryCircular DichroismOrganic ChemistryDNAGeneral ChemistryTelomeremolecular dynamics0104 chemical sciences3. Good healthG-QuadruplexesOxidative StressEnzymeBiochemistrychemistrySettore CHIM/03 - Chimica Generale E InorganicaGuanine quadruplexesNucleic Acid Conformationoxidative DNA lesionsGuanine-QuadruplexesDNAOxidative stressdescription
International audience; Human telomeric DNA, in G-quadruplex (G4) conformation, is characterized by a remarkable structural stability that confers it the capacity to resist to oxidative stress producing one or even clustered 8-oxoguanine (8oxoG) lesions. We present a combined experimental/computational investigation, by using circular dichroism in aqueous solutions, cellular immunofluorescence assays and molecular dynamics simulations, that identifies the crucial role of the stability of G4s to oxidative lesions, related also to their biological role as inhibitors of telomerase, an enzyme overexpressed in most cancers associated to oxidative stress.
year | journal | country | edition | language |
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2021-06-16 |