P1512
Thermolysin from Geobacillus stearothermophilus
Type X, lyophilized powder, 30-350 units/mg protein (E1%/280)
Synonim(y):
Protease from Geobacillus stearothermophilus, Thermophilic-bacterial protease
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About This Item
Polecane produkty
pochodzenie biologiczne
Geobacillus stearothermophilus
typ
Type X
Postać
lyophilized powder
aktywność właściwa
30-350 units/mg protein (E1%/280)
masa cząsteczkowa
34.6 kDa by amino acid sequence
oczyszczone przez
crystallization
Warunki transportu
wet ice
temp. przechowywania
−20°C
Opis ogólny
Thermolysin is a protease that has specificity different from other proteases available for sequence investigations.
Zastosowanie
A thermostable (thermophilic) extracellular metalloendopeptidase containing four calcium ions. Cofactors are zinc and calcium. Hydrolyzes protein bonds on the N-terminal side of hydrophobic amino acid residues. The pH optimum is 8.0 and the optimal temperature for activity is 70 °C. Considerably stable from pH 5 to 9.5. Thermolysin has a low cleavage specificity, therefore, it produces a number of short fragments that are suitable for sequencing. Preferential cleavage: X-cleavage-Y-Z where X=any amino acid; Y=Leu, Phe, Ile, Val, Met, Ala and Z is any amino acid other than Pro. Cleavage N-terminal to Leu is preferred over cleavage of N-terminal to Phe which is preferred over the others. Often used to do limited proteolysis for peptide mapping and studies of protein structure and conformational changes.
Thermolysin has been shown to have a prosequeence that acts as an intramolecular chaperone in vivo. It has also been used in a study to investigate the effects of sodium chloride on thermal stability and catalytic activity.
Thermolysin is also commonly used for the commercial synthesis of N-(benzyloxycarbonyl)-L-aspartyl-L-phenylalanine methyl ester, the precursor for the artificial sweetener aspartame.
Jakość
Contains many extraneous enzymes.
Definicja jednostki
One unit will hydrolyze casein to produce color equivalent to 1.0 μmole (181 μg) of tyrosine per min at pH 7.5 at 37 °C (color by Folin-Ciocalteu reagent).
Postać fizyczna
lyophilized powder containing calcium and sodium acetate buffer salts
Uwaga dotycząca przygotowania
The pH optimum is 8.0 and the optimal temperature for activity is 70 °C. Considerably stable from pH 5 to 9.5. Thermolysin has a low cleavage specificity, therefore, it produces a number of short fragments that are suitable for sequencing. Preferential cleavage: X-cleavage-Y-Z where X=any amino acid; Y=Leu, Phe, Ile, Val, Met, Ala and Z is any amino acid other than Pro. Cleavage N-terminal to Leu is preferred over cleavage of N-terminal to Phe which is preferred over the others.
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Hasło ostrzegawcze
Danger
Zwroty wskazujące rodzaj zagrożenia
Zwroty wskazujące środki ostrożności
Klasyfikacja zagrożeń
Resp. Sens. 1
Kod klasy składowania
11 - Combustible Solids
Klasa zagrożenia wodnego (WGK)
WGK 3
Temperatura zapłonu (°F)
Not applicable
Temperatura zapłonu (°C)
Not applicable
Środki ochrony indywidualnej
dust mask type N95 (US), Eyeshields, Faceshields, Gloves
Certyfikaty analizy (CoA)
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C Marie-Claire et al.
Journal of molecular biology, 285(5), 1911-1915 (1999-02-02)
The zinc metalloendopeptidase, thermolysin (EC 3.4.24.27) produced by Bacillus thermoproteolyticus serves as a model of important physiological enzymes such as neprilysin, angiotensin converting enzyme and endothelin converting enzyme. Thermolysin is synthesised as a pre-proenzyme, with an N-terminal prosequence of 204
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Nature methods, 2(3), 207-212 (2005-03-23)
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