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• W3048943082 abstract "Abstract Synthetically modified DNA G-quadruplexes (GQs) have great potential in the development of designer molecules for a wide range of applications. Identification of the role of various structural elements in the folding and final topology of artificial GQs is necessary to predict their secondary structure. We report here the results of spectroscopic and electrophoretic studies of GQ scaffolds formed by G-rich sequences comprising four G3-tracts of different polarity connected by either a single-nucleotide thymine loop or a non-natural tetraethyleneglycol loop. Depending on G-strand polarities, loop arrangement and the presence of extra 5’-base G-rich oligonucleotides form monomeric, dimeric, or multimeric species of different topologies. In most cases, oligonucleotides were able to fold into stable parallel or hybrid GQs. However, certain specific arrangements of loops and G-tracts resulted in a diverse mixture of low stable structures. Comparative analysis of topology, stability, and structural heterogeneity of different G-rich sequences suggests the important role of loop type and arrangement, G3-tract polarities, and the presence of 5’-capping residues in the outcome of the folding process. The results also imply that the formation of anti-parallel G-hairpin intermediates is a key event in major favourable folding pathways." @default.
• W3048943082 created "2020-08-18" @default.
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• W3048943082 date "2020-11-01" @default.
• W3048943082 modified "2023-09-26" @default.
• W3048943082 title "Folding topology, structural polymorphism, and dimerization of intramolecular DNA G-quadruplexes with inverted polarity strands and non-natural loops" @default.
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• W3048943082 doi "https://doi.org/10.1016/j.ijbiomac.2020.08.097" @default.
• W3048943082 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32800956" @default.
• W3048943082 hasPublicationYear "2020" @default.
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