title: Atomic-scale structures and interactions between the guanine quartet and potassium.
abstract: The atomic-scale identification of the G4K1 structural motif is achieved using an interplay of STM imaging and DFT calculations. Its high stability is found to be caused by the delicate balance between hydrogen bonding and metal-ligand interaction, which is of utmost relevance to model interactions of the G-quadruplex with cations in vivo.
authors.affiliation: College of Materials Science and Engineering, Key Laboratory for Advanced Civil Engineering Materials (Ministry of Education), Tongji University, Caoan Road 4800, Shanghai 201804, PR China. xuwei@tongji.edu.cn
authors.forename: Wei
authors.initials: W
authors.lastname: Xu
authors.forename: Qinggang
authors.initials: Q
authors.lastname: Tan
authors.forename: Miao
authors.initials: M
authors.lastname: Yu
authors.forename: Qiang
authors.initials: Q
authors.lastname: Sun
authors.forename: Huihui
authors.initials: H
authors.lastname: Kong
authors.forename: Erik
authors.initials: E
authors.lastname: Lægsgaard
authors.forename: Ivan
authors.initials: I
authors.lastname: Stensgaard
authors.forename: Jørgen
authors.initials: J
authors.lastname: Kjems
authors.forename: Jian-guo
authors.initials: JG
authors.lastname: Wang
authors.forename: Chen
authors.initials: C
authors.lastname: Wang
authors.forename: Flemming
authors.initials: F
authors.lastname: Besenbacher
mesh_terms: D054856:G-Quadruplexes; D006860:Hydrogen Bonding; D008024:Ligands; D008670:Metals / Q000737:chemistry; D011188:Potassium / Q000737:chemistry*
chemical_list: D008024:Ligands; D008670:Metals; D011188:Potassium