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• W4386366178 abstract "The majority of drugs are metabolized by cytochrome P450 (CYP) enzymes, primarily belonging to the CYP1, CYP2 and CYP3 families. Genetic variations are the main cause of inter-individual differences in drug response, which constitutes a major concern in pharmacotherapy. G-quadruplexes (G4s), are non-canonical DNA and RNA secondary structures formed by guanine-rich sequences. G4s have been implicated in cancer and gene regulation. In this study, we investigated putative G4-forming sequences (PQSs) in the CYP genes. Our findings reveal a high density of PQSs in the full genes of CYP family 2. Moreover, we observe an increased density of PQSs in the promoters of CYP family 1 genes compared to non-CYP450 genes. Importantly, stable PQSs were also identified in all studied CYP genes. Subsequently, we assessed the impact of the most frequently reported genetic mutations in the selected genes and the possible effect of these mutations on G4 formation as well as on the thermodynamic stability of predicted G4s. We found that 4 SNPs overlap G4 sequences and lead to mutated DNA and RNA G4 forming sequences in their context. Notably, the mutation in the CYP2C9 gene, which is associated with impaired (S)-warfarin metabolism in patients, alters a G4 sequence. We then demonstrated that at least 10 of the 13 chosen cytochrome P450 G4 candidates form G-quadruplex structures in vitro, using a combination of spectroscopic methods. In conclusion, our findings indicate the potential role of G-quadruplexes in cytochrome genes regulation, and emphasize the importance of G-quadruplexes in drug metabolism." @default.
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• W4386366178 date "2023-09-01" @default.
• W4386366178 modified "2023-10-06" @default.
• W4386366178 title "G-quadruplex forming sequences in the genes coding for cytochrome P450 enzymes and their potential roles in drug metabolism" @default.
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• W4386366178 doi "https://doi.org/10.1016/j.biochi.2023.08.014" @default.
• W4386366178 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37660977" @default.
• W4386366178 hasPublicationYear "2023" @default.
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