title: Spectral Analysis of Interaction between Human Telomeric G-Quadruplex and Liliflorin A, the First Lignan Derivative Interacted with G-Quadruplex DNA.
abstract: Human telomeric G-quadruplex is a four-stranded structure folded by guanines (G) via Hoogsteen hydrogen bonding. The ligands which stabilize the G-quadruplex are often telomerase inhibitors and may become antitumor agents. Here, the interaction between a lignan derivative liliflorin A and human telomeric sequence dGGG (TTAGGG)3G-quadruplex HTG21 were examined by CD, FRET, and NMR spectroscopic methods. In addition, Molecular Docking was used to study the binding of liliflorin A to dTAGGG (TTAGGG)3 G-quadruplex HTG23. The CD data showed that liliflorin A enhanced HTG21 T(m). The T(m) value of G-quadruplex was enhanced 3.2 degrees C by 4.0 μmol x L(-1) liliflorin A in FRET. The NMR spectra of HTG21 showed vivid alteration after reacting with liliflorin A in 3 hours. Molecular Docking suggested liliflorin A bound to the wide groove of HTG23 at G9, G10, G16 and G17. Liliflorin A was the first lignan derivative that could stabilize HTG21 selectively and provided a new candidate for antitumor drug design targeting on human telomeric G-quadruplex.
authors.forename: Ting-ting
authors.initials: TT
authors.lastname: Liu
authors.forename: Shuang
authors.initials: S
authors.lastname: Zhou
authors.forename: Qian-lan
authors.initials: QL
authors.lastname: Jia
authors.forename: Wen-shu
authors.initials: WS
authors.lastname: Wang
authors.forename: Xiao-qian
authors.initials: XQ
authors.lastname: Yan
authors.forename: Wen-hao
authors.initials: WH
authors.lastname: Zhang
authors.forename: Shuai-qi
authors.initials: SQ
authors.lastname: Wang
authors.forename: Yu-guo
authors.initials: YG
authors.lastname: Jiao
mesh_terms: D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; D054856:G-Quadruplexes; D006147:Guanine; D006801:Humans; D006860:Hydrogen Bonding; D008024:Ligands; D017705:Lignans / Q000737:chemistry*; D062105:Molecular Docking Simulation; D013057:Spectrum Analysis; D016615:Telomere / Q000737:chemistry*
chemical_list: D000970:Antineoplastic Agents; D004791:Enzyme Inhibitors; D008024:Ligands; D017705:Lignans; D006147:Guanine