C8571
Cathepsin B from human liver
buffered aqueous solution, ≥1,500 units/mg protein (E1%/280)
Synonym(s):
Cathepsin B1
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About This Item
CAS Number:
MDL number:
UNSPSC Code:
12352200
NACRES:
NA.32
biological source
human liver
Quality Level
form
buffered aqueous solution
specific activity
≥1,500 units/mg protein (E1%/280)
UniProt accession no.
shipped in
dry ice
storage temp.
−70°C
Gene Information
human ... CTSB(1508)
General description
Cathepsin B gene is mapped to human chromosome 8p23.1. It is a lysosomal cysteine with 252 amino acids distributed in two chains and is homologous to rat liver sequence. It has disc shaped structure with two domains namely the left-hand ′L′ domain at the amino terminal and right hand ′R′ domain at the carboxyl-terminal.
Application
Cathepsin B from human liver has been used:
- as a positive control in the screening Cathepsin B inhibitor assay
- in wall extension (expansin activity) assay
- in microinjection human foreskin fibroblasts to test its effect on apoptosis induction
Biochem/physiol Actions
Cathepsin B from human liver is highly expressed in the esophageal adenocarcinoma (EAC). It reduces hepatic inflammation and fibrogenesis and may serve as a potential candidate for treating liver diseases.
Cathepsin B has been found to cleave procaspase 1 and procaspase 11 and to induce apoptosis in digitonin-permeabilized cells. Translocation of cathepsin B from the cytoplasm to the nucleus contributes to bile salt induced apoptosis of rat hepatocytes. Levels of cathepsin B in PC12 cells significantly decrease 12 to 24 hours after apoptosis is induced.
Packaging
Package size based on protein content
Unit Definition
One unit will liberate 1 nanomole of 7-amino-4-methylcoumarin from Z-Arg-Arg 7-amido-4-methylcoumarin per min at pH 6.0 at 40 °C.
Physical form
Solution in 50 mM sodium acetate, pH 5.0, with 1 mM EDTA.
inhibitor
Product No.
Description
Pricing
related product
Product No.
Description
Pricing
Storage Class Code
10 - Combustible liquids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Certificates of Analysis (COA)
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The refined 2.15 AX-ray crystal structure of human liver cathepsin B: the structural basis for its specificity.
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Articles
Enzymatic Assay of Cathepsin B
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