5WV7 image
Deposition Date 2016-12-22
Release Date 2017-05-24
Last Version Date 2023-11-22
Entry Detail
PDB ID:
5WV7
Keywords:
DNA
Title:
Crystal structure of d(CCGGGGTACCCCGG)2 at 1.4A resolution
Biological Source:
Source Organism(s):
synthetic construct (Taxon ID: 32630)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.41 Å
R-Value Free:
0.24
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 41 21 2
5WV7 validation report
Macromolecular Entities
Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*CP*CP*GP*GP*GP*GP*TP*AP*CP*CP*CP*CP*GP*G)-3')
Chain IDs:A, B
Chain Length:14
Number of Molecules:2
Biological Source:synthetic construct
Primary Citation
Crystal structure of d(CCGGGGTACCCCGG)2 at 1.4 angstrom resolution.
Acta Crystallogr F Struct Biol Commun 73 259 265 (2017)
PMID: 28471357 DOI: 10.1107/S2053230X17004770

Abstact

The X-ray crystal structure of the DNA tetradecamer sequence d(CCGGGGTACCCCGG)2 is reported at 1.4 Å resolution in the tetragonal space group P41212. The sequence was designed to fold as a four-way junction. However, it forms an A-type double helix in the presence of barium chloride. The metal ion could not be identified in the electron-density map. The crystallographic asymmetric unit consists of one A-type double helix with 12 base pairs per turn, in contrast to 11 base pairs per turn for canonical A-DNA. A large number of solvent molecules have been identified in both the grooves of the duplex and around the backbone phosphate groups.

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Primary Citation of related structures
5WV7
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