Kinetically favored platination of adenine in the G-rich human telomeric repeat

Lu Rao, Ulrich Bierbach

Research output: Contribution to journalArticlepeer-review

39 Scopus citations


The interactions of PT-ACRAMTU, a cytotoxic platinum-acridine conjugate, with the human telomeric G-quadruplex have been studied using in-line high-performance liquid chromatography-mass spectrometry and footprinting assays. The conjugate reacts significantly faster with quadruplex DNA (t1/2 = 1.2 h) than with double-stranded DNA, and A-N7, and not G-N7, is the kinetically preferred target, an unprecedented reactivity feature in platinum-DNA interactions. Unlike the clinical platinum drug cisplatin, which targets the human telomeric sequence nonspecifically, the platinum-intercalator technology has the potential to produce telomere-specific anticancer agents via a mechanism that kinetically discriminates between G and A in the two DNA secondary structures.

Original languageEnglish (US)
Pages (from-to)15764-15765
Number of pages2
JournalJournal of the American Chemical Society
Issue number51
StatePublished - Dec 26 2007
Externally publishedYes

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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