ISDA: 1D98

Deposition Date 1992-10-17

Release Date 1993-04-15

Last Version Date 2024-02-07

Entry Detail

PDB ID:

1D98

Keywords:

DNA

Title:

THE STRUCTURE OF AN OLIGO(DA).OLIGO(DT) TRACT AND ITS BIOLOGICAL IMPLICATIONS

Biological Source:

Source Organism:

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Observed:

0.20

Space Group:

P 21 21 21

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*CP*GP*CP*AP*AP*AP*AP*AP*AP*GP*CP*G)-3')
Chain IDs:A
Chain Length:12
Number of Molecules:1
Biological Source:

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*CP*GP*CP*TP*TP*TP*TP*TP*TP*GP*CP*G)-3')
Chain IDs:B
Chain Length:12
Number of Molecules:1
Biological Source:

Primary Citation

The structure of an oligo(dA).oligo(dT) tract and its biological implications.

Nelson, H.C, Finch, J.T, Luisi, B.F, Klug, A.Show

Nature 330 221 226 (1987)

PMID: 3670410 DOI: 10.1038/330221a0

Abstact

Poly(dA).poly(dT) has unusual properties in that it cannot associate into nucleosomes and short, phased runs of it cause DNA bending. The crystal structure of a B-type DNA dodecamer containing a homopolymeric run of six A.T base pairs shows that this region possesses special structural features, including a system of bifurcated hydrogen bonds, which explains some of the properties of this simple homopolymer.

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Primary Citation of related structures