ISDA

Entry Detail

PDB ID:

1DPS

Keywords:

DNA BINDING PROTEIN

Title:

THE CRYSTAL STRUCTURE OF DPS, A FERRITIN HOMOLOG THAT BINDS AND PROTECTS DNA

Biological Source:

Source Organism:

Escherichia coli

Host Organism:

Escherichia coli

PDB Version:

Deposition Date:

1998-02-23

Release Date:

1998-09-16

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.60 Å

R-Value Free:

0.22

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 21 21 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:DPS
Mutations:S164C
Chain IDs:A, B, C, D, E, F, G, H, I, J, K, L
Chain Length:167
Number of Molecules:12
Biological Source:Escherichia coli

UniProt ID:P0ABT2 Pfam ID:PF00210

Ligand Molecules

Primary Citation

The crystal structure of Dps, a ferritin homolog that binds and protects DNA.

Grant, R.A, Filman, D.J, Finkel, S.E, Kolter, R, Hogle, J.M.Show

Nat.Struct.Biol. 5 294 303 (1998)

PMID: 9546221 DOI: 10.1038/nsb0498-294

Abstact

The crystal structure of Dps, a DNA-binding protein from starved E. coli that protects DNA from oxidative damage, has been solved at 1.6 A resolution. The Dps monomer has essentially the same fold as ferritin, which forms a 24-mer with 432 symmetry, a hollow core and pores at the three-fold axes. Dps forms a dodecamer with 23 (tetrahedral) point group symmetry which also has a hollow core and pores at the three-folds. The structure suggests a novel DNA-binding motif and a mechanism for DNA protection based on the sequestration of Fe ions.

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Primary Citation of related structures