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T9698

Sigma-Aldrich

Thioredoxin Reductase from rat liver

buffered aqueous glycerol solution, ≥100 units/mg protein (Bradford)

Sinonimo/i:

NADPH:Oxidised Thioredoxin Oxidoreductase, Thioredoxin: NADP+ Oxidoreductase

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About This Item

Numero CAS:
9074-14-0
Classificazione EC (Enzyme Commission):
1.8.1.9 (BRENDA, IUBMB)
Numero MDL:
MFCD00678149
Codice UNSPSC:
12352200
NACRES:
NA.32

Origine biologica

rat liver

Livello qualitativo

200

Saggio

≥90% (GE)

Forma fisica

buffered aqueous glycerol solution

Attività specifica

≥100 units/mg protein (Bradford)

PM

55—67 kDa

tecniche

activity assay: suitable

Impurezze

Glutathione reductase

Solubilità

water: soluble

Compatibilità

suitable for molecular biology

N° accesso UniProt

O89049

Condizioni di spedizione

dry ice

Temperatura di conservazione

−20°C

Informazioni sul gene

rat ... Txnrd1(58819)

Descrizione generale

Research area: Cell signaling

Applicazioni

Thioredoxin Reductase from rat liver can be used for studying the uptake and reduction of a-lipoic acid by utilizing reducing capacity of human erythrocytes. The product can also be used for studying the activation mechanism of transglutaminase 2 (TG2) in the extracellular matrix by using Thioredoxin.

Azioni biochim/fisiol

Thioredoxin Reductase is a ubiquitous enzyme that catalyzes the active site disulfide of thioredoxin by NADPH. The product also reduces ubiquinone and regenerates ubiquinol, a powerful antioxidant.
Thioredoxin reductase (TrxR) is a NADPH-dependent oxidoreductase containing one FAD per subunit that reduces the active site disulfide in oxidized thioredoxin (Trx). The molecular weight of the isozymes from mammalian sources vary between 55-67 kDa as compared with 35 kDa in prokaryotes, plants or yeast. The substrate specificity of the mammalian enzyme is much broader than the prokaryotic enzyme reducing both mammalian and E. coli thioredoxins as well as non-disulfide substrates such selenite, lipoic acids, lipid hydroperoxides, and hydrogen peroxide.
Thioredoxin reductase from mammalian sources contains a selenocysteine residue that is essential for the activity of the enzyme. It is one of the antioxidant enzymes present in the mammalian cell together with catalase, glutathione peroxidase and superoxide dismutase, and helps in removal of reactive oxygen species (ROS) from the cell. An example is the removal of excess nitric oxide (NO) by the formation of a complex with glutathione forming the S-nitroso-glutathione adduct (GS-NO). This can be cleaved directly by thioredoxin reductase. Hydrogen peroxide, another deleterious oxidant in the cell, is also reduced directly by mammalian TrxR.

Definizione di unità

One unit will cause an increase in absorbance of 1.0 at 412 nm (when measured in a non-coupled assay containing DTNB [Sigma No. D8130] alone as substrate) per minute at pH 7.0 at 25 °C.

Stato fisico

Solution in 50 mM Tris-HCl, pH 7.5, 300 mM NaCl, 1 mM EDTA, and 10% glycerol.

Codice della classe di stoccaggio

12 - Non Combustible Liquids

Classe di pericolosità dell'acqua (WGK)

WGK 1

Punto d’infiammabilità (°F)

Not applicable

Punto d’infiammabilità (°C)

Not applicable

Dispositivi di protezione individuale

Eyeshields, Gloves, multi-purpose combination respirator cartridge (US)

Certificati d'analisi (COA)

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L Zhong et al.
The Journal of biological chemistry, 275(24), 18121-18128 (2000-06-13)
Mammalian thioredoxin reductases (TrxR) are dimers homologous to glutathione reductase with a selenocysteine (SeCys) residue in the conserved C-terminal sequence -Gly-Cys-SeCys-Gly. We removed the selenocysteine insertion sequence in the rat gene, and we changed the SeCys(498) encoded by TGA to
Luciano Oehninger et al.
Dalton transactions (Cambridge, England : 2003), 42(5), 1657-1666 (2012-11-15)
Metal complexes with N-heterocyclic carbene (NHC) ligands have been widely used in catalytic chemistry and are now increasingly considered for the development of new chemical tools and metal based drugs. Ruthenium complexes of the type (p-cymene)(NHC)RuCl(2) interacted with biologically relevant
Arun Kumar Selvam et al.
Antioxidants (Basel, Switzerland), 9(2) (2020-02-09)
Kynurenine aminotransferase 1 (KYAT1 or CCBL1) plays a major role in Se-methylselenocysteine (MSC) metabolism. It is a bi-functional enzyme that catalyzes transamination and beta-elimination activity with a single substrate. KYAT1 produces methylselenol (CH3SeH) via β-elimination activities with MSC as a
Aristi P Fernandes et al.
PloS one, 7(11), e50727-e50727 (2012-12-12)
Naturally occurring selenium compounds like selenite and selenodiglutathione are metabolized to selenide in plants and animals. This highly reactive form of selenium can undergo methylation and form monomethylated and multimethylated species. These redox active selenium metabolites are of particular biological
Kely Navakoski de Oliveira et al.
ChemMedChem, 8(2), 256-264 (2013-01-03)
Thioredoxin reductase (TrxR) is overexpressed in cancer cells and is therefore a putative cancer target. Inhibition of this enzyme is considered an important strategy for the development of new chemotherapeutic agents with a specific mechanism of action. Organotin compounds have
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