2LE6 image
Deposition Date 2011-06-10
Release Date 2011-08-31
Last Version Date 2024-05-15
Entry Detail
PDB ID:
2LE6
Keywords:
DNA
Title:
Structure of a dimeric all-parallel-stranded G-quadruplex stacked via the 5'-to-5' interface
Biological Source:
Source Organism:
(Taxon ID: )
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
100
Conformers Submitted:
10
Selection Criteria:
structures with the lowest energy
2LE6 validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*IP*GP*TP*GP*GP*GP*TP*GP*GP*GP*TP*GP*GP*GP*T)-3')
Chain IDs:A, B
Chain Length:16
Number of Molecules:2
Biological Source:
Ligand Molecules
NA
Primary Citation
Stacking of G-quadruplexes: NMR structure of a G-rich oligonucleotide with potential anti-HIV and anticancer activity
Nucleic Acids Res. ? ? ? (2011)
PMID: 21840903 DOI: 10.1093/nar/gkr539

Abstact

G-rich oligonucleotides T30695 (or T30923), with the sequence of (GGGT)(4), and T40214, with the sequence of (GGGC)(4), have been reported to exhibit anti-HIV and anticancer activity. Here we report on the structure of a dimeric G-quadruplex adopted by a derivative of these sequences in K(+) solution. It comprises two identical propeller-type parallel-stranded G-quadruplex subunits each containing three G-tetrad layers that are stacked via the 5'-5' interface. We demonstrated control over the stacking of the two monomeric subunits by sequence modifications. Our analysis of possible structures at the stacking interface provides a general principle for stacking of G-quadruplexes, which could have implications for the assembly and recognition of higher-order G-quadruplex structures.

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Primary Citation of related structures
1Y8D