Download MendeleyStructure of two intramolecular G-quadruplexes formed by natural human telomere sequences in K+ solution.
Phan, A.T., Kuryavyi, V., Luu, K.N., Patel, D.J.(2007) Nucleic Acids Res 35: 6517-6525
- PubMed: 17895279
- DOI: https://doi.org/10.1093/nar/gkm706
- Primary Citation of Related Structures:
2JSK, 2JSL, 2JSM, 2JSQ - PubMed Abstract:
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.
Organizational Affiliation:
Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA. phantuan@ntu.edu.sg
