ISDA

Deposition Date 2008-01-08

Release Date 2008-08-26

Last Version Date 2024-10-16

Entry Detail

PDB ID:

2VL3

Keywords:

OXIDOREDUCTASE

Title:

Oxidized and reduced forms of human peroxiredoxin 5

Biological Source:

Source Organism:

HOMO SAPIENS (Taxon ID: 9606)

Host Organism:

ESCHERICHIA COLI M15

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.83 Å

R-Value Free:

0.28

R-Value Work:

0.23

R-Value Observed:

0.23

Space Group:

C 2 2 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:PEROXIREDOXIN-5
Gene (Uniprot):PRDX5
Chain IDs:A, B, C
Chain Length:172
Number of Molecules:3
Biological Source:HOMO SAPIENS

UniProt ID:P30044 Pfam ID:PF08534 EC:1.11.1.24

Primary Citation

The Crystal Structures of Oxidized Forms of Human Peroxiredoxin 5 with an Intramolecular Disulfide Bond Confirm the Proposed Enzymatic Mechanism for Atypical 2-Cys Peroxiredoxins.

Smeets, A, Marchand, C, Linard, D, Knoops, B, Declercq, J.P.Show

Arch.Biochem.Biophys. 477 98 ? (2008)

PMID: 18489898 DOI: 10.1016/J.ABB.2008.04.036

Abstact

Peroxiredoxin 5 (PRDX5) belongs to the PRDX superfamily of thiol-dependent peroxidases able to reduce hydrogen peroxide, alkyl hydroperoxides and peroxynitrite. PRDX5 is classified in the atypical 2-Cys subfamily of PRDXs. In this subfamily, the oxidized form of the enzyme is characterized by the presence of an intramolecular disulfide bridge between the peroxidatic and the resolving cysteine residues. We report here three crystal forms in which this intramolecular disulfide bond is indeed observed. The structures are characterized by the expected local unfolding of the peroxidatic loop, but also by the unfolding of the resolving loop. A new type of interface between PRDX molecules is described. The three crystal forms were not oxidized in the same way and the influence of the oxidizing conditions is discussed.

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