6FQ2 image
Deposition Date 2018-02-13
Release Date 2018-12-05
Last Version Date 2024-01-17
Entry Detail
PDB ID:
6FQ2
Keywords:
DNA
Title:
Structure of minimal sequence for left -handed G-quadruplex formation
Biological Source:
Source Organism:
synthetic construct (Taxon ID: 32630)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.31 Å
R-Value Free:
0.22
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
P 32
6FQ2 validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*TP*GP*GP*TP*GP*GP*TP*GP*GP*TP*G)-3')
Chain IDs:A, B
Chain Length:12
Number of Molecules:2
Biological Source:synthetic construct
Ligand Molecules
K
Primary Citation
A Minimal Sequence for Left-Handed G-Quadruplex Formation.
Angew. Chem. Int. Ed. Engl. 58 2331 2335 (2019)
PMID: 30481397 DOI: 10.1002/anie.201812628

Abstact

Recently, we observed the first example of a left-handed G-quadruplex structure formed by natural DNA, named Z-G4. We analysed the Z-G4 structure and inspected its primary 28-nt sequence in order to identify motifs that convey the unique left-handed twist. Using circular dichroism spectroscopy, NMR spectroscopy, and X-ray crystallography, we revealed a minimal sequence motif of 12 nt (GTGGTGGTGGTG) for formation of the left-handed DNA G-quadruplex, which is found to be highly abundant in the human genome. A systematic analysis of thymine loop mutations revealed a moderate sequence tolerance, which would further broaden the space of sequences prone to left-handed G-quadruplex formation.

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Primary Citation of related structures
4U5M