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Publication Abstract from PubMed

Intramolecular G-quadruplexes formed by human telomere sequences are attractive anticancer targets. Recently, four-repeat human telomere sequences have been shown to form two different intramolecular (3 + 1) G-quadruplexes in K(+) solution (Form 1 and Form 2). Here we report on the solution structures of both Form 1 and Form 2 adopted by natural human telomere sequences. Both structures contain the (3 + 1) G-tetrad core with one double-chain-reversal and two edgewise loops, but differ in the successive order of loop arrangements within the G-quadruplex scaffold. Our results provide the structural details at the two ends of the G-tetrad core in the context of natural sequences and information on different loop conformations. This structural information might be important for our understanding of telomere G-quadruplex structures and for anticancer drug design targeted to such scaffolds.

Structure of two intramolecular G-quadruplexes formed by natural human telomere sequences in K+ solution.,Phan AT, Kuryavyi V, Luu KN, Patel DJ Nucleic Acids Res. 2007;35(19):6517-25. Epub 2007 Sep 25. PMID:17895279^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.