Download MendeleyStructure of a two-G-tetrad intramolecular G-quadruplex formed by a variant human telomeric sequence in K+ solution: insights into the interconversion of human telomeric G-quadruplex structures.
Zhang, Z., Dai, J., Veliath, E., Jones, R.A., Yang, D.(2010) Nucleic Acids Res 38: 1009-1021
- PubMed: 19946019
- DOI: https://doi.org/10.1093/nar/gkp1029
- Primary Citation of Related Structures:
2KKA - PubMed Abstract:
Human telomeric DNA G-quadruplex has been considered as an attractive target for cancer therapeutic intervention. The telomeric sequence shows intrinsic structure polymorphism. Here we report a novel intramolecular G-quadruplex structure formed by a variant human telomeric sequence in K(+) solution. This sequence forms a basket-type intramolecular G-quadruplex with only two G-tetrads but multiple-layer capping structures formed by loop residues. While it is shown that this structure can only be detected in the specifically truncated telomeric sequences without any 5'-flanking residues, our results suggest that this two-G-tetrad conformation is likely to be an intermediate form of the interconversion of different telomeric G-quadruplex conformations.
Organizational Affiliation:
College of Pharmacy, The University of Arizona, Tucson, AZ 85721, USA.
