Procathepsin S, human recombinant | 7525

Cathepsin S (CTSS) is a lysosomal cysteine protease of the papain family and may participate in the degradation of antigenic proteins to peptides for presentation on MHC class II molecules. CTSS is synthesized as inactive precursor of 331 amino acids consisting of a 15-aa signal peptide, a propeptide of 99 aa, and a mature polypeptide of 217 aa. It is activated in the lysosomes by a proteolytic cleavage of the propeptide. The deduced amino acid sequence contains only one potential N-glycosylation site located in the propeptide. Compared with the abundant cathepsins B, L and H, cathepsin S shows a restricted tissue distribution, with highest levels in spleen, heart, and lung. In addition, evidences indicate that cathepsin S generates amyloid beta-peptide from amyloidogenic fragments of amyloid precursor protein (APP) in the endosomal/lysosomal compartment, and is implicated in the pathogenesis of Alzheimer’s disease and Down Syndrome.

7525 | Procathepsin S human recombinant DataSheet

Biomolecule/Target: Procathepsin S

Synonyms: CTSS

Alternates names: A Proliferating-inducing Ligand, TNFSF13, TRDL-1

Taglines: A lysosomal cysteine protease participating in the degradation of antigenic proteins to peptides

NCBI Gene ID #: 8741

NCBI Gene Symbol: APRIL

Gene Source: Human

Accession #: O75888

Recombinant: Yes

Source: Hi-5 insect cells

Purity by SDS-PAGEs: 95%

Assay: SDS-PAGE

Purity: N/A

Assay #2: HPLC

Endotoxin Level: < 0.1 ng/g of protein (<1EU/g).

Activity (Specifications/test method): Determined by its ability to induce cell death in Jurkat cells.

Biological activity: Determined by its ability to induce cell death in Jurkat cells.

Results: N/A

Binding Capacity: N/A

Unit Definition: N/A

Molecular Weight: 16.3 kDa

Concentration: N/A

Appearance: Lyophilized

Physical form description: Sterile filtered through a 0.2 micron filter. Lyophilized from 10 mM Sodium Phosphate, pH 7.5, 500 mM NaCl and 5% Trehalose.

Reconstitution Instructions: Centrifuge the vial prior to opening. Reconstitute in water to a concentration of 0.1-0.5 mg/ml. Do not vortex. For extended storage, it is recommended to further dilute in a buffer containing a carrier protein (example 0.1% BSA) and store in working aliquots at -20°C to -80°C.

Amino acid sequence: AVLTQKQKKQ HSVLHLVPIN ATSKDDSDVT EVMWQPALRR GRGLQAQGYG VRIQDAGVYL LYSQVLFQDV TFTMGQVVSR EGQGRQETLF RCIRSMPSHP DRAYNSCYSA GVFHLHQGDI LSVIIPRARA KLNLSPHGTF LGFVKL