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S8409

Superoxide Dismutase from bovine liver

Name: Superoxide Dismutase from bovine liver
Brand: SIGMA

ammonium sulfate suspension, 2,000-6,000 units/mg protein (biuret)

Synonym(s):

SOD, Superoxide: superoxide oxidoreductase

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About This Item

CAS Number:

9054-89-1

UNSPSC Code:

12352204

NACRES:

NA.54

EC Number:

232-943-0

MDL number:

MFCD00132404

EC Number:

1.15.1.1 (BRENDA, IUBMB)

Specific activity:

2,000-6,000 units/mg protein (biuret)

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Properties

form

ammonium sulfate suspension

Quality Level

200

specific activity

2,000-6,000 units/mg protein (biuret)

mol wt

32.5 kDa

UniProt accession no.

P00442

storage temp.

2-8°C

Gene Information

cow ... SOD1(281495)

Description

General description

Research area: Cell Signaling

Superoxide dismutases are a group of low molecular weight metalloproteins present in all aerobic cells of plants, animals, and micro-organisms. They provide protection against damaging reactions with the superoxide radical anion (O2-) by catalyzing its disproportionation into oxygen and hydrogen peroxide.

Application

Superoxide Dismutase from bovine liver has been used:

for measuring mitochondrial hydrogen peroxide production in skeletal muscle
as a positive control in Cu(II) binding stability assay
as a positive control in superoxide dismutase assay
in a study to assess the inactivation of endothelial-derived relaxing factor by oxidized lipoproteins.
in a study to investigate the role of hydrogen peroxide in the cytotoxicity of the xanthine/xanthine oxidase system.

Biochem/physiol Actions

Superoxide Dismutase catalyzes the dismutation of superoxide radicals to hydrogen peroxide and molecular oxygen. It plays a critical role in the defense of cells against the toxic effects of oxygen radicals. It competes with nitric oxide (NO) for superoxide anion (which reacts with NO to form peroxynitrite), thereby SOD promotes the activity of NO. SOD has also been shown to suppress apoptosis in cultured rat ovarian follicles, neural cell lines, and transgenic mice.

Physical form

Suspension in 3.8 M (NH₄)₂SO₄, pH 7.0

Analysis Note

For assay method, see McCord, J.M. and Fridovich,I., J. Biol. Chem., 244, 6049 (1969).

Other Notes

One unit will inhibit reduction of cytochrome c by 50% in a coupled system with xanthine oxidase at pH 7.8 at 25 °C in a 3.0 mL reaction volume. Xanthine oxidase concentration should produce an initial ΔA₅₅₀of 0.025 ± 0.005 per min.