197D

ORTHORHOMBIC CRYSTAL STRUCTURE OF THE A-DNA OCTAMER D(GTACGTAC). COMPARISON WITH THE TETRAGONAL STRUCTURE

PDB DOI: https://doi.org/10.2210/pdb197D/pdb
NAKB: 197D

Classification: DNA
Mutation(s): No

Deposited: 1994-11-24 Released: 1995-02-07
Deposition Author(s): Langlois D'Estaintot, B., Dautant, A., Courseille, C., Precigoux, G.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.19 Å
R-Value Observed: 0.161

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Orthorhombic crystal structure of the A-DNA octamer d(GTACGTAC). Comparison with the tetragonal structure.

Langlois d'Estaintot, B., Dautant, A., Courseille, C., Precigoux, G.

(1993) Eur J Biochem 213: 673-682

PubMed: 8477741 Search on PubMed
DOI: https://doi.org/10.1111/j.1432-1033.1993.tb17807.x
Primary Citation of Related Structures:
197D

PubMed Abstract:
The X-ray crystal structure of the double-helical A-DNA octanucleotide d(GTACGTAC) has been solved by molecular replacement and refined to a resolution of 0.219 nm. The final R-factor is equal to 16.1% for 1516 observed reflections with F > 4 sigma(F). The sequence crystallizes as an A-DNA-type double helix in the orthorhombic space group P2(1)2(1)2, with one duplex molecule solvated by 66 water molecules in the asymmetric unit. Cell parameters are a = 3.860 nm, b = 5.082 nm, c = 2.174 nm. It is the first time that such a crystal form has been observed. This orthorhombic structure has been compared with the tetragonal structure of the same oligonucleotide. It adopts a bent structure with an unusual packing between symmetry-related molecules.

Organizational Affiliation

Laboratoire de Cristallographie et de Physique Cristalline, Unité de Recherche Associée 144, Centre National de la Recherche Scientifique, Université de Bordeaux I, France.