Download MendeleyLocked nucleic acid building blocks as versatile tools for advanced G-quadruplex design.
Haase, L., Weisz, K.(2020) Nucleic Acids Res 48: 10555-10566
- PubMed: 32890406
- DOI: https://doi.org/10.1093/nar/gkaa720
- Primary Citation of Related Structures:
6YCV, 6YEP - PubMed Abstract:
A hybrid-type G-quadruplex is modified with LNA (locked nucleic acid) and 2'-F-riboguanosine in various combinations at the two syn positions of its third antiparallel G-tract. LNA substitution in the central tetrad causes a complete rearrangement to either a V-loop or antiparallel structure, depending on further modifications at the 5'-neighboring site. In the two distinct structural contexts, LNA-induced stabilization is most effective compared to modifications with other G surrogates, highlighting a potential use of LNA residues for designing not only parallel but various more complex G4 structures. For instance, the conventional V-loop is a structural element strongly favored by an LNA modification at the V-loop 3'-end in contrast with an alternative V-loop, clearly distinguishable by altered conformational properties and base-backbone interactions as shown in a detailed analysis of V-loop structures.
Organizational Affiliation:
Institut für Biochemie, Universität Greifswald, Felix-Hausdorff-Str. 4, D-17489 Greifswald, Germany.
