Volume 53, Issue 4 pp. 999-1002
Communication

Solution Structure of a G-quadruplex Bound to the Bisquinolinium Compound Phen-DC3

Wan Jun Chung

Wan Jun Chung

School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

These authors contributed equally.

Search for more papers by this author
Dr. Brahim Heddi

Dr. Brahim Heddi

School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

These authors contributed equally.

Search for more papers by this author
Dr. Florian Hamon

Dr. Florian Hamon

Institut Curie, Section Recherche, CNRS, UMR 176, Université Paris-Sud, Bat. 110–112, 91405 Orsay (France)

Search for more papers by this author
Dr. Marie-Paule Teulade-Fichou

Corresponding Author

Dr. Marie-Paule Teulade-Fichou

Institut Curie, Section Recherche, CNRS, UMR 176, Université Paris-Sud, Bat. 110–112, 91405 Orsay (France)

Marie-Paule Teulade-Fichou, Institut Curie, Section Recherche, CNRS, UMR 176, Université Paris-Sud, Bat. 110–112, 91405 Orsay (France)

Anh Tuân Phan, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

Search for more papers by this author
Prof. Dr. Anh Tuân Phan

Corresponding Author

Prof. Dr. Anh Tuân Phan

School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

Marie-Paule Teulade-Fichou, Institut Curie, Section Recherche, CNRS, UMR 176, Université Paris-Sud, Bat. 110–112, 91405 Orsay (France)

Anh Tuân Phan, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)

Search for more papers by this author
First published: 16 December 2013
Citations: 189

This research was supported by the Singapore Ministry of Education and Nanyang Technological University (grants to A.T.P.). Phen-DC3 is a phenanthroline dicarboxamide bisquinolinium.

Graphical Abstract

Evidence stacks up for π-stacking: The structure of the complex formed between Phen-DC3, which specifically targets G-quadruplexes and exhibits potent biological activity in vivo, and an intramolecular G-quadruplex derived from the c-myc promoter was solved by NMR spectroscopy. Phen-DC3 was found to interact with the quadruplex through extensive π-stacking with guanine bases of the top G-tetrad (see picture).

Abstract

Phen-DC3 is a highly promising compound that specifically targets G-quadruplexes, with potent biological effects observed in vivo. We used NMR spectroscopy to solve the structure of the complex formed between Phen-DC3 and an intramolecular G-quadruplex derived from the c-myc promoter. Structural information revealed that Phen-DC3 interacts with the quadruplex through extensive π-stacking with guanine bases of the top G-tetrad. On the basis of our structure, modifications are proposed for the development of this compound for selective targeting of a specific G-quadruplex conformation.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.