ISDA

Deposition Date 2017-09-29

Release Date 2017-12-06

Last Version Date 2024-01-17

Entry Detail

PDB ID:

6ELK

Keywords:

OXIDOREDUCTASE

Title:

C.elegans MnSOD-3 mutant - Q142H

Biological Source:

Source Organism:

Caenorhabditis elegans (Taxon ID: 6239)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.65 Å

R-Value Free:

0.21

R-Value Work:

0.18

R-Value Observed:

0.18

Space Group:

P 41 21 2

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Superoxide dismutase [Mn] 2, mitochondrial
Gene (Uniprot):sod-3
Mutations:Q142H
Chain IDs:A, B (auth: C)
Chain Length:195
Number of Molecules:2
Biological Source:Caenorhabditis elegans

UniProt ID:P41977 Pfam ID:PF00081, PF02777

Ligand Molecules

GOL

SO4

Primary Citation

A Single Mutation is Sufficient to Modify the Metal Selectivity and Specificity of a Eukaryotic Manganese Superoxide Dismutase to Encompass Iron.

Hunter, T, Bonetta, R, Sacco, A, Vella, M, Sultana, P.M, Trinh, C.H, Fadia, H.B.R, Borowski, T, Garcia-Fandino, R, Stockner, T, Hunter, G.J.Show

Chemistry 24 5303 5308 (2018)

PMID: 29178484 DOI: 10.1002/chem.201704655

Abstact

We have generated a site-directed mutant of the manganese superoxide dismutase SOD-3 of C.elegans (MnSOD-3) which modifies the metal specificity of the enzyme. While wild-type MnSOD-3 functions with manganese in the active site (3600 U mg-1 of protein) it has little or no activity when iron is incorporated. However, when histidine replaces glutamine 142 in the active site, the enzyme retains 50 % of its activity and becomes cambialistic for its metal cofactor exhibiting very similar specific activity with either manganese or iron.

Legend

Protein

Chemical

Disease

Primary Citation of related structures