ISDA

Deposition Date 2007-02-24

Release Date 2007-05-01

Last Version Date 2023-12-13

Entry Detail

PDB ID:

2JI2

Keywords:

OXIDOREDUCTASE

Title:

X-ray structure of E114A mutant of superoxide reductase from Desulfoarculus baarsii in the native, reduced form

Biological Source:

Source Organism:

Desulfarculus baarsii (Taxon ID: 453230)

Host Organism:

Escherichia coli DH5[alpha]

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.70 Å

R-Value Free:

0.22

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

I 2 2 2

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Desulfoferrodoxin
Gene (Uniprot):dfx
Mutations:E114A
Chain IDs:A, B, C, D
Chain Length:126
Number of Molecules:4
Biological Source:Desulfarculus baarsii

UniProt ID:Q46495 Pfam ID:PF06397, PF01880 EC:1.15.1.2

Ligand Molecules

FE2

NO3

Primary Citation

Raman-assisted crystallography reveals end-on peroxide intermediates in a nonheme iron enzyme.

Katona, G, Carpentier, P, Niviere, V, Amara, P, Adam, V, Ohana, J, Tsanov, N, Bourgeois, D.Show

Science 316 449 453 (2007)

PMID: 17446401 DOI: 10.1126/science.1138885

Abstact

Iron-peroxide intermediates are central in the reaction cycle of many iron-containing biomolecules. We trapped iron(III)-(hydro)peroxo species in crystals of superoxide reductase (SOR), a nonheme mononuclear iron enzyme that scavenges superoxide radicals. X-ray diffraction data at 1.95 angstrom resolution and Raman spectra recorded in crystallo revealed iron-(hydro)peroxo intermediates with the (hydro)peroxo group bound end-on. The dynamic SOR active site promotes the formation of transient hydrogen bond networks, which presumably assist the cleavage of the iron-oxygen bond in order to release the reaction product, hydrogen peroxide.

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Primary Citation of related structures