Cathepsin B human
SIGMA/SRP6414 - recombinant, expressed in HEK 293 cells, ≥95% (SDS-PAGE)
Synonym: APPS; CPSB; CTSB
Product Type: Chemical
assay | ≥95% (SDS-PAGE) |
biological source | human |
form | lyophilized |
impurities | <1 EU/μg endotoxin (LAL test) |
mol wt | calculated mol wt 29 kDa (Mature) |
calculated mol wt 36.7 kDa (Pro) | |
observed mol wt 34 kDa | |
observed mol wt 43_kDaand34 kDa (DTT-reduced. Protein migrates due to glycosylation. Arg18 (pro) or Phe74 (mature) is the predicted N-terminal.) | |
packaging | pkg of 10 μg |
recombinant | expressed in HEK 293 cells |
shipped in | wet ice |
storage temp. | −20°C |
tag | 6-His tagged (C-terminus) |
UniProt accession no. | P07858 ![]() ![]() |
General description: | 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. |
Physical form: | 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. |
Reconstitution: | 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. |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 3 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | ≥95% (SDS-PAGE) |
Storage Temp. | −20°C |
UNSPSC | 12352200 |