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219343 Sigma-Aldrich

Cathepsin S, Human, Recombinant, E. coli

Cathepsin S, Human, Recombinant, E. coli, is prepared without a tag or fusion protein. A major lysosomal cysteine proteinase with high specific activity.

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Properties

Related Categories Application Index, Biochemicals and Reagents, Enzymes, Inhibitors, and Substrates, Protein & Nucleic Acid Isolation
Quality Level   100
assay   ≥90% (SDS-PAGE)
form   liquid
specific activity activity   ≥30,000 mU/mg protein
mfr. no.   Calbiochem®
storage condition   OK to freeze
  avoid repeated freeze/thaw cycles
storage conditions   = -70C
shipped in   wet ice

Description

General description

Note: 1 mU = 1 milliunit.

Recombinant, human cathepsin S expressed in E. coli without a tag or fusion protein. A major lysosomal cysteine proteinase preferentially expressed in macrophages and microglia. Exhibits high specific activity.

Recombinant, human cathepsin S expressed in E. coli without a tag or fusion protein. A major lysosomal cysteine proteinase that is preferentially expressed in macrophages and microglia. Shown to be involved in the processing of antigenic peptides for presentation by MHC Class II molecules on the surface of antigen-presenting cells by mediating invariant (Ii) chain degradation. Inhibition of cathepsin S results in impaired antigen-presentation.

Packaging

25 μg in Plastic ampoule

Warning

Toxicity: Harmful (C)

Unit Definition

One unit is defined as the amount of enzyme that will hydrolyze 1.0 µmol Z-VVR-AMC per min at 37°C, pH 6.5. Note: 1 mU = 1 milliunit.

Physical form

In 35 mM potassium phosphate, 35 mM Sodium acetate, 2 mM DTT, 2 mM EDTA, 50% ethylene glycol, pH 6.5.

Reconstitution

Following initial thaw, aliquot and freeze (-70°C).

Other Notes

Liuzzo, J.P., et al. 1999. Mol. Med.5, 334.
Riese, R.J., et al. 1998. J. Clin. Invest.101, 2351.
Sukhova, G.K., et al. 1998. J. Clin. Invest.102, 576.
Kirschke, H., and Wiederanders, B. 1994. Methods Enzymol.244, 500.
Xin, X.Q., et al. 1992. Arch. Biochem. Biophys.299, 334.
Kirschke, H., et al. 1989. Biochem. J.264, 467.

Safety & Documentation

Safety Information

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