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U0251

Sigma-Aldrich

Urease from Canavalia ensiformis (Jack bean)

Type C-3, powder, ≥600,000 units/g solid

Synonyme(s) :

Jack bean urease, Urea amidohydrolase

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About This Item

Numéro CAS:
9002-13-5
Numéro de classification (Commission des enzymes):
3.5.1.5 (BRENDA, IUBMB)
Numéro CE :
232-656-0
Numéro MDL:
MFCD00070858
Code UNSPSC :
12352204
eCl@ss :
32160410
Nomenclature NACRES :
NA.54

Source biologique

Canavalia ensiformis

Type

Type C-3

Forme

powder

Activité spécifique

≥600,000 units/g solid

Poids mol.

~544620 Da

Produit purifié par

crystallization

Température de stockage

−20°C

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Description générale

Subunit molecular weight: ~90,770
Composed of six subunits with total molecular weight: ~544,620
Urease is a nickel-dependent metalloenzyme , found in various plants, bacteria, fungi, and algae. It contains two distinct subunits-UreA(26.5 kDa) and UreB (60.3–61.6 kDa).

Actions biochimiques/physiologiques

Urease aids in the bioavailability of nitrogen in plants. It is implicated in defense mechanism and exhibits insecticidal activity. In addition, urease exhibits antifungal activity by retarding growth and affecting membrane integrity of filamentous fungi and yeasts.
Urease was shown to induce vacuolation in Hela cells, an effect dependent on the ability of urease to convert urea to ammonia.

Définition de l'unité

One micromolar unit will liberate 1.0 μmole of NH3 from urea per min at pH 7.0 at 25 °C. It is equivalent to 1.0 I.U. or 0.054 Sumner unit (1.0 mg ammonia nitrogen in 5 minutes at pH 7.0 at 20 °C)

Pictogrammes

Health hazardExclamation mark
GHS08,GHS07

Mention d'avertissement

Danger

Mentions de danger

H315,H319,H334,H335

Classification des risques

Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3

Organes cibles

Respiratory system

Code de la classe de stockage

11 - Combustible Solids

Classe de danger pour l'eau (WGK)

WGK 1

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Consulter la Bibliothèque de documents

J Ryan Feathers et al.
Journal of structural biology: X, 5, 100047-100047 (2021-04-06)
The resolution of cryo-EM reconstructions is fundamentally limited by the Nyquist frequency, which is half the sampling frequency of the detector and depends upon the magnification used. In principle, super-resolution imaging should enable reconstructions to surpass the physical Nyquist limit
T L Cover et al.
Infection and immunity, 59(4), 1264-1270 (1991-04-01)
Concentrated broth culture supernatants from 50 to 60% of Helicobacter pylori strains induce eukaryotic cell vacuolation in vitro. A quantitative assay for cell vacuolation was developed on the basis of the rapid uptake of visibly vacuolated HeLa cells was significantly
Barbara Krajewska et al.
Plant physiology and biochemistry : PPB, 43(7), 651-658 (2005-07-19)
A pH-variation study of jack bean (Canavalia ensiformis) urease steady-state kinetic parameters and of the inhibition constant of boric acid, a urease competitive inhibitor, was performed using both noninhibitory organic (MES, HEPES and CHES) and inhibitory inorganic (phosphate) buffers, in
J Jessy et al.
The Biochemical journal, 277 ( Pt 3), 693-696 (1991-08-01)
Recent studies showed that hyperammonaemia caused many of the metabolic changes in portacaval-shunted rats, a model of hepatic encephalopathy. These changes included a depression in the cerebral metabolic rate of glucose (CMRGlc), an indication of decreased brain function. 2. The
N E Dixon et al.
Science (New York, N.Y.), 191(4232), 1144-1150 (1976-03-19)
In an attempt to understand the role of nickel in jack bean urease (1), we turned to a variety of other enzymes important in the utilization, production, or transfer of ammonia. We found several, including the L-histidine and L-phenylalanine ammonialyases
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