Thioredoxin 1, Recombinant, Human (Thioredoxin-1, Trx-1, trxA, fipA, tsnC, b3781, JW5856, Thioredoxin 1)

Thioredoxins (Trx) are small, multi-functional proteins with oxidoreductase activity and are ubiquitous in essentially all living cells. Trx contains a redox-active disulfide/dithiol group within the conserved Cys-Gly-Pro-Cys active site. The two cysteine residues in the conserved active centers can be oxidized to form intramolecular disulfide bonds. Reduction of the active site disulfide in oxidized Trx is catalyzed by Trx reductase with NADPH as the electron donor. The reduced Trx is a hydrogen donor for ribonucleotide reductase, the essential enzyme for DNA synthesis, and a potent general protein disulfide reductase with numerous functions in growth and redox regulations. Specific protein disulfide targets for reduction by Trx include protein disulfide -isomerase (PDI) and a number of transcription factors such as p53, NF-kB and AP-1 (T1-151). Trx is also capable of removing H2O2, particularly when it is coupled with either methionine sulfoxide reductase or several isoforms of peroxiredoxins.\n\nSource:\nRecombinant corresponding to aa1-105, from human Thioredoxin 1 expressed in E.coli.\n\nMolecular Weight:\n~11.7kD\n\nSpecific Activity:\n11.5 U/mg (One unit will cause a change of A650 of 1 in 1 min at 25 degrees C in the insulin reduction assay)\n\nStorage and Stability:\nAliquot to avoid repeated freezing and thawing and store at -70 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.

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SPECIFICATIONS

Catalog Number

T1010-01M

Size

500ug

Form

Supplied as a liquid in 20mM HEPES, pH 7.5, 1mM EDTA, 10% gylcerol.

Purity

~95% (SDS-PAGE)

References

1. Andoh, T. et al. (2002) J.Biol.Chem. 277, 9655-9660. 2. Arner, E. S. and Holmgren, A. (2000) Eur. J. Biochem. 267, 6102-6109. 3. Lundstrom, J. and Holmgren, A. (1990) J. Biol. Chem. 265, 1994-9120. 4. Nordberg, J. and Arner, E. S. J. (2001) Free Radic. Biol. Med. 31, 1287-1312. 5. Matthews, J. R. et al. (1992) Nucleic Acids Res. 20, 3821-3830. 6. Wei, S. J. (2000) Cancer Res. 60, 6688-6695. 7. Chae, H. Z. (1999) Methods Enzymol. 300, 219-226.