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Human Cathepsin S / CTSS Protein, His Tag (Pro-form, MALS verified)

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Menge
CTS-H52H9-50ug
$300.00
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CTS-H52H9-1mg
$2,040.00
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CTS-H52H9
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Synonyms

CTSS, Cathepsin S

Source

Human Cathepsin S, His Tag (CTS-H52H9) is expressed from human 293 cells (HEK293). It contains AA Gln 17 - Ile 331 (Accession # P25774-1).

Predicted N-terminus: Gln 17

Molecular Characterization
Other Tags and Version Biotin & Other Labeled Version

This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 37.7 kDa. The protein migrates as 38-42 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

The protein was designed as the pro-form (AA 17-331). However, due to the inherent autoprocessing nature of Cathepsin S, the activation peptide is partially cleaved during expression and purification. Consequently, the final product coexists as a mixture of the pro-form (AA 17-331) and the mature form (AA 115-331).

The protein is designed as a dimer.

Endotoxin

Less than 1.0 EU per μg by the LAL method / rFC method.

Purity

>90% as determined by SDS-PAGE.

>95% as determined by SEC-MALS.

Formulation

Supplied as 0.2 μm filtered solution in 12.5 mM MES, 75 mM NaCl, pH6.5 with glycerol as protectant.

Contact us for customized product form or formulation.

Shipping and Storage

This product is supplied and shipped on dry ice.

Please avoid repeated freeze-thaw cycles.

This product is stable after storage at:
  • The product MUST be stored at -70°C or lower upon receipt;
  • -70°C for 3 months under sterile conditions.
ACRO Quality Management System

Background Introduction

Cathepsin S is also known as CTSS, which is a member of the peptidase C1 family. Cathepsin S is a lysosomal cysteine protease that may participate in the degradation of antigenic proteins to peptides for presentation on MHC class II molecules. Cathepsin S can function as an elastase over a broad pH range in alveolar macrophages. The catalytic activity of cathepsin S is similar to cathepsin L, but with much less activity on Z-Phe-Arg-|-NHMec, and more activity on the Z-Val-Val-Arg-|-Xaa compound.