The mass weight of this product varies from lot to lot and may range from 5 – 25 mg of powder per vial. A brief survey of recent lots indicates an average of approximately 7.0 mg/vial.
K4519
Keratinase
lyophilized powder
Synonym(s):
Keratinase from Bacillus licheniformis, KerA, Keratinolytic protease
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| Size/SKU | Availability | Price |
|---|---|---|
500 units | Check Cart for Availability | $488.00 |
recombinant
expressed in E. coli BL21
Quality Segment
form
lyophilized powder
specific activity
300-1000 units/mg protein
mol wt
~39 kDa
pH range
5.5-12.5(optimum activity is seen at pH 12.5)
pI
8.73
storage temp.
−20°C
General description
Keratinase is also metalloprotease present in bacteria as well as eukaryotes. Keratinase isolated from Bacilus licheniformis culture is a monomeric enzyme.
Keratin. Keratinases have also been used for the degradation of prion and prion-like proteins.
Keratinase is a non-specific serine protease that cleaves non-terminal peptide bonds. This enzyme is active between 37°- 70°C. The highest activity is typically seen at 70°C.
Keratinase is activated by 0.10% SDS, 1.0% CTAB, and EDTA. Keratinase is partially inhibited by Tween®20, DMSO, isopropanol, methanol, and ethanol.
Application
Biochem/physiol Actions
Keratinase is a particular class of extracellular proteolytic inducible enzyme with the capability of degrading insoluble keratin substrates. It is important for hydrolyzing hair, feather, and collagen in sewage system during waste water treatment. It is also useful in food industry, animal feed preparation etc. Insoluble feather keratin from poultry industry may be converted by enzymatic hydrolysis to glues, feedstuffs, fertilizers, films or used for the production of rare amino acids serine, cysteine and proline.
Preparation Note
The enzyme can be solubilized at 0.5-1.0 mg/mL in either sterile water or phosphate buffer. The best activity is seen with freshly prepared solutions. However, single-use aliquots of Keratinase solutions can be stored at -20° C.
Other Notes
One unit of enzyme is able to hydrolyze casein resulting in an absorbance value as the Folin-Ciocalteau reagent equivalent to 1 umole (181μg) of tyrosine per minute at pH 7.5 at 37 °C.
This enzyme contains a C-terminus 6-Histidine tag.
Legal Information
TWEEN is a registered trademark of Croda International PLC
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This Item | |||
|---|---|---|---|
| description lyophilized powder | description powder, ≥2500 units/g, recombinant, expressed in Aspergillus oryzae | description targeting mouse Kera | description from bovine pancreas |
| specific activity 300-1000 units/mg protein | specific activity ≥2500 units/g | specific activity - | specific activity ~40 U/mg dry powder (dry powder according to Kunitz (+25°C; RNA as substrate).) |
| recombinant expressed in E. coli BL21 | recombinant expressed in Aspergillus oryzae | recombinant - | recombinant - |
| form lyophilized powder | form powder | form lyophilized powder | form dry powder (prepared from crystallized ribonuclease) |
| storage temp. −20°C | storage temp. 2-8°C | storage temp. −20°C | storage temp. 2-8°C |
| mol wt ~39 kDa | mol wt - | mol wt - | mol wt - |
| Quality Level 200 | Quality Level 200 | Quality Level 100 | Quality Level - |
Signal Word
Warning
Hazard Codes
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class
11 - Combustible Solids
WGK
WGK 3
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