Structural basis of DNA quadruplex recognition by an acridine drug.

نویسندگان

  • Nancy H Campbell
  • Gary N Parkinson
  • Anthony P Reszka
  • Stephen Neidle
چکیده

The crystal structure of a complex between the bimolecular human telomeric quadruplex d(TAGGGTTAGGGT)2 and the experimental anticancer drug BRACO-19, has been determined, to 2.5 A resolution. The binding site for the BRACO-19 molecule is at the interface of two parallel-folded quadruplexes, sandwiched between a G-tetrad surface and a TATA tetrad, and held in the site by networks of water molecules. The structure rationalizes the existing structure-activity data and provides a starting-point for the structure-based design of quadruplex-binding ligands

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Structural Investigations of Acridine Derivatives by CoMFA and CoMSIA Reveal Novel Insight into Their Structures toward DNA G-Quadruplex Mediated Telomerase Inhibition and Offer a Highly Predictive 3D-Model for Substituted Acridines

Stabilization of G-quadruplex structures formed from telomeric DNA, by means of G-quadruplex selective ligands, is a means of inhibiting the telomerase enzyme. This makes G-quadruplex an emerging target for cancer therapy. The objective of the current 3D QSAR study is to uncover structural requirements for acridine derivatives, which would eventually assist and complement the rational drug-desi...

متن کامل

Recognition and discrimination of DNA quadruplexes by acridine-peptide conjugates.

We have explored a series of trisubstituted acridine-peptide conjugates for their ability to recognize and discriminate between DNA quadruplexes derived from the human telomere, and the c-kit and N-ras proto-oncogenes. Quadruplex affinity was measured as the peptide sequences were varied, together with their substitution position on the acridine, and the identity of the C-terminus (acid or amid...

متن کامل

Structure-based design of selective and potent G quadruplex-mediated telomerase inhibitors.

The telomerase enzyme is a potential therapeutic target in many human cancers. A series of potent inhibitors has been designed by computer modeling, which exploit the unique structural features of quadruplex DNA. These 3,6,9-trisubstituted acridine inhibitors are predicted to interact selectively with the human DNA quadruplex structure, as a means of specifically inhibiting the action of human ...

متن کامل

Synthesis, DNA-binding and antiproliferative properties of acridine and 5-methylacridine derivatives.

Several acridine derivatives were synthesized and their anti-proliferative activity was determined. The most active molecules were derivatives of 5-methylacridine-4-carboxylic acid. The DNA binding properties of the synthesized acridines were analyzed by competitive dialysis and compared with the anti-proliferative activities. While inactive acridine derivatives showed high selectivity for G-qu...

متن کامل

Recognition of Chelerythrine to Human Telomeric DNA and RNA G-quadruplexes

A study on binding of antitumor chelerythrine to human telomeric DNA/RNA G-quadruplexes was performed by using DNA polymerase stop assay, UV-melting, ESI-TOF-MS, UV-Vis absorption spectrophotometry and fluorescent triazole orange displacement assay. Chelerythrine selectively binds to and stabilizes the K(+)-form hybrid-type human telomeric DNA G-quadruplex of biological significance, compared w...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • Journal of the American Chemical Society

دوره 130 21  شماره 

صفحات  -

تاریخ انتشار 2008