ISDA

Deposition Date 1988-08-18

Release Date 2011-07-13

Last Version Date 2023-12-27

Entry Detail

PDB ID:

1VT6

Keywords:

DNA

Title:

Molecular structure of the octamer D(G-G-C-C-G-G-C-C) modified A-DNA

Biological Source:

Source Organism:

(Taxon ID: )

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.25 Å

R-Value Work:

0.17

R-Value Observed:

0.17

Space Group:

P 43 21 2

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*GP*GP*CP*CP*GP*GP*CP*C)-3')
Chain IDs:A
Chain Length:8
Number of Molecules:1
Biological Source:

Ligand Molecules

Primary Citation

Molecular structure of the octamer d(G-G-C-C-G-G-C-C): modified A-DNA.

Wang, A.H, Fujii, S, van Boom, J.H, Rich, A.Show

Proc.Natl.Acad.Sci.USA 79 3968 3972 (1982)

PMID: 6955784

Abstact

The deoxynucleotide fragment d(GpGpCpCpGpGpCpC) was synthesized and crystallized, and its three-dimensional structure was determined by x-ray diffraction techniques to a resolution of 2.25 A. The molecule forms a right-handed double helix in which the two base pairs at either end of the molecule are in the conventional A-DNA conformation, while the central four base pairs have a modified form in which alternate residues have sugar conformations that are closer to those in B-DNA than in A-DNA. The molecules have an intermolecular contact in which the planar terminal guanine . cytosine base pair lies on the flat minor groove surface of the A-DNA helix.

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Primary Citation of related structures