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Human CellExp Cathepsin B, human recombinant protein
CTSB, CPSB, APPS
- SPECIFICATION
- CITATIONS
- PROTOCOLS
- BACKGROUND
| Primary Accession | P07858 |
|---|---|
| Calculated MW | This protein is fused with a 6×His tag at the C-terminus, has a calculated MW of 36.7 kDa (Pro) and 29 kDa (Mature). The predicted N-terminus is Arg18 (pro) or Phe74 (mature). DTT-reduced Protein migrates as 43 kDa and 34 kDa due to glycosylation. |
| Gene ID | 1508 |
|---|---|
| Gene Symbol | CTSB |
| Other Names | CTSB, CPSB, APPS |
| Gene Source | Human |
| Source | HEK293 cells |
| Assay&Purity | SDS-PAGE; ≥95% |
| Assay2&Purity2 | N/A; |
| Recombinant | Yes |
| Results | Measured by its ability to cleave the fluorogenic peptide substrate Z-LR-AMC. Measured in 100 µl reaction mixture containing 25 mM MES, pH 5.0, 0.01 µg rhCathepsin B, and 10 µM reaction substrate. The specific activity is >2800 pmol/min/ µg. |
| Target/Specificity | Cathepsin B |
| Application Notes | Centrifuge the vial prior to opening. Reconstitute in sterile PBS, pH 7.4 to a concentration of 50 µg/ml. Do not vortex. This solution can be stored at 2-8°C for up to 1 month. For extended storage, it is recommended to store at -20°C. |
| Format | Lyophilized |
| Storage | -20°C; Lyophilized from 0.22 µm filtered solution in 50 mM Tris-HCl and 150 mM NaCl, pH 8.0. Generally 5-8% Mannitol or trehalose is added as a protectant before lyophilization. |
Thousands of laboratories across the world have published research that depended on the performance of antibodies from Abcepta to advance their research. Check out links to articles that cite our products in major peer-reviewed journals, organized by research category.
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Provided below are standard protocols that you may find useful for product applications.
Background
Cathepsin B (CTSB) also known as APP secretase (APPS) and CPSB, is an enzymatic protein belonging to the peptidase C1 family. Cathepsin B / CTSB is synthesized as a preproenzyme. Following removal of the signal peptide, the inactive proenzyme undergoes further modifications including removal of the pro region to result in the active enzyme. The catalytic activity of Cathepsin B / APPS contains: Hydrolysis of proteins with broad specificity for peptide bonds; preferentially cleaves -Arg-Arg-|-Xaa bonds in small molecule substrates (thus differing from cathepsin L); In addition to being an endopeptidase, shows peptidyl-dipeptidase activity, liberating C-terminal dipeptides. As a thiol protease, cathepsin B / CPSB is believed to participate in intracellular degradation and turnover of proteins and has also been implicated in tumor invasion and metastasis. Overexpression of cathepsin B has been associated with esophageal adenocarcinoma and other tumors.
References
Chan S.J.,et al.Proc. Natl. Acad. Sci. U.S.A. 83:7721-7725(1986).
Cao L.,et al.Gene 139:163-169(1994).
Ota T.,et al.Nat. Genet. 36:40-45(2004).
Otsuki T.,et al.DNA Res. 12:117-126(2005).
Mural R.J.,et al.Submitted (JUL-2005) to the EMBL/GenBank/DDBJ databases.
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