ISDA

Deposition Date 1988-08-18

Release Date 2011-07-13

Last Version Date 2023-12-27

Entry Detail

PDB ID:

1VTY

Keywords:

DNA

Title:

Crystal structure of a Z-DNA fragment containing thymine/2-aminoadenine base pairs

Biological Source:

Source Organism:

synthetic construct (Taxon ID: 32630)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.30 Å

R-Value Observed:

0.21

Space Group:

P 21 21 21

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*CP*(NH2)AP*CP*GP*TP*G)-3')
Chain IDs:A, B
Chain Length:6
Number of Molecules:2
Biological Source:synthetic construct

Modified Residue

Compound ID	Chain ID	Parent Comp ID	Details	2D Image
1AP	A	DA	2,6-DIAMINOPURINE NUCLEOTIDE

Ligand Molecules

NH2

Primary Citation

Crystal structure of a Z-DNA fragment containing thymine/2-aminoadenine base pairs.

Coll, M, Wang, A.H, van der Marel, G.A, van Boom, J.H, Rich, A.Show

J. Biomol. Struct. Dyn. 4 157 172 (1986)

PMID: 3271437 DOI: 10.1080/07391102.1986.10506337

Abstact

The Z-DNA structure has been shown to form in two crystals made from self-complementary DNA hexamers d(CGTDCG) and d(CDCGTG) which contain thymine/2-aminoadenine (TD) base pairs. The latter structure has been solved and refined to 1.3 A resolution and it shows only small conformational changes due to the introduction of the TD base pairs in comparison with the structure of d(CG)3. Spectroscopic studies with these compounds demonstrate that DNA molecules containing 2-aminoadenine residues form Z-DNA slightly more easily than do those containing adenine nucleotides, but not as readily as the parent sequence containing only guanine-cytosine base pairs.

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Protein

Chemical

Disease

Primary Citation of related structures