ISDA

Deposition Date 1996-07-09

Release Date 1996-09-20

Last Version Date 2024-02-14

Entry Detail

PDB ID:

272D

Keywords:

DNA

Title:

PARALLEL AND ANTIPARALLEL (G.GC)2 TRIPLE HELIX FRAGMENTS IN A CRYSTAL STRUCTURE

Biological Source:

Source Organism:

(Taxon ID: ) (Taxon ID: )

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.00 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(*GP*GP*CP*CP*AP*AP*TP*TP*GP*G)-3')
Chain IDs:A, B
Chain Length:10
Number of Molecules:2
Biological Source:

Primary Citation

Parallel and antiparallel (G.GC)2 triple helix fragments in a crystal structure.

Vlieghe, D, Van Meervelt, L, Dautant, A, Gallois, B, Precigoux, G, Kennard, O.Show

Science 273 1702 1705 (1996)

PMID: 8781231

Abstact

Nucleic acid triplexes are formed by sequence-specific interactions between single-stranded polynucleotides and the double helix. These triplexes are implicated in genetic recombination in vivo and have application to areas that include genome analysis and antigene therapy. Despite the importance of the triple helix, only limited high-resolution structural information is available. The x-ray crystal structure of the oligonucleotide d(GGCCAATTGG) is described; it was designed to contain the d(G middle dotGC)2 fragment and thus provide the basic repeat unit of a DNA triple helix. Parameters derived from this crystal structure have made it possible to construct models of both parallel and antiparallel triple helices.

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Primary Citation of related structures