ISDA: 4OKL

Deposition Date 2014-01-22

Release Date 2014-02-19

Last Version Date 2023-09-20

Entry Detail

PDB ID:

4OKL

Keywords:

DNA

Title:

Crystal Structure of d(CCCCGGTACCGGGG)2 at 1.65 Angstrom

Biological Source:

Source Organism:

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.65 Å

R-Value Free:

0.24

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

P 41 21 2

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Macromolecular Entities

Polymer Type:polydeoxyribonucleotide
Molecule:14 mer A-DNA
Chain IDs:A, B
Chain Length:14
Number of Molecules:2
Biological Source:

Primary Citation

Structure of d(CCCCGGTACCGGGG)2 at 1.65 angstrom resolution.

Purushothaman, M, Varghese, A, Mandal, P.K, Gautham, N, Venkadesh, S, Mandal, P.K, Gautham, N, Mandal, P.K, Venkadesh, S, Gautham, N.Show

Acta Crystallogr F Struct Biol Commun 70 860 865 (2014)

PMID: 25005078 DOI: 10.1107/S2053230X1401084X

Abstact

The crystal structure of the tetradecanucleotide d(CCCCGGTACCGGGG)2 has previously been reported as an A-type double helix at a resolution of 2.5 Å in space group P41. Here, the structure of this sequence was determined at a significantly higher resolution of 1.65 Å in space group P4₁2₁2. The differences in crystal packing between the former and latter are described. The crystallographic asymmetric unit consists of one tetradecanucleotide duplex that spans more than one full turn of the A-helix. This structure allowed the unambiguous identification of solvent interactions.

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Primary Citation of related structures