Solution structures of multiple G-quadruplex complexes induced by a platinum(II)-based tripod reveal dynamic binding

Wenting Liu, Yi Fang Zhong, Liu Yi Liu, Chu Tong Shen, Wenjuan Zeng, Fuyi Wang, Danzhou Yang, Zong Wan Mao

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

DNA G-quadruplexes are not only attractive drug targets for cancer therapeutics, but also have important applications in supramolecular assembly. Here, we report a platinum(II)-based tripod (Pt-tripod) specifically binds the biological relevant hybrid-1 human telomeric G-quadruplex (Tel26), and strongly inhibits telomerase activity. Further investigations illustrate Pt-tripod induces the formation of monomeric and multimeric Pt-tripod‒Tel26 complex structures in solution. We solve the 1:1 and the unique dimeric 4:2 Pt-tripod–Tel26 complex structures by NMR. The structures indicate preferential binding of Pt-tripod to the 5ʹ-end of Tel26 at a low Pt-tripod/Tel26 ratio of 0–1.0. After adding more Pt-tripod, the Pt-tripod binds the 3ʹ-end of Tel26, unexpectedly inducing a unique dimeric 4:2 structure interlocked by an A:A non-canonical pair at the 3ʹ-end. Our structures provide a structural basis for understanding the dynamic binding of small molecules with G-quadruplex and DNA damage mechanisms, and insights into the recognition and assembly of higher-order G-quadruplexes.

Original languageEnglish (US)
Article number3496
JournalNature Communications
Volume9
Issue number1
DOIs
StatePublished - Dec 1 2018
Externally publishedYes

Fingerprint

G-Quadruplexes
tripods
Platinum
platinum
deoxyribonucleic acid
assembly
Telomerase
DNA
DNA Damage
drugs
cancer
Nuclear magnetic resonance
damage
nuclear magnetic resonance
Molecules
Pharmaceutical Preparations
molecules
Neoplasms

ASJC Scopus subject areas

  • Chemistry(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Physics and Astronomy(all)

Cite this

Solution structures of multiple G-quadruplex complexes induced by a platinum(II)-based tripod reveal dynamic binding. / Liu, Wenting; Zhong, Yi Fang; Liu, Liu Yi; Shen, Chu Tong; Zeng, Wenjuan; Wang, Fuyi; Yang, Danzhou; Mao, Zong Wan.

In: Nature Communications, Vol. 9, No. 1, 3496, 01.12.2018.

Research output: Contribution to journalArticle

Liu, Wenting ; Zhong, Yi Fang ; Liu, Liu Yi ; Shen, Chu Tong ; Zeng, Wenjuan ; Wang, Fuyi ; Yang, Danzhou ; Mao, Zong Wan. / Solution structures of multiple G-quadruplex complexes induced by a platinum(II)-based tripod reveal dynamic binding. In: Nature Communications. 2018 ; Vol. 9, No. 1.
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