U4002

Urease from Canavalia ensiformis (Jack bean)

Type IX, powder, 50,000-100,000 units/g solid

• Synonyma: Jack bean urease, Urea amidohydrolase
• Číslo CAS: 9002-13-5
• UNSPSC Code: 12352204
• eCl@ss: 32160410
• EC Number: 232-656-0
• NACRES: NA.54
• MDL number: MFCD00070858
• Číslo EC: 3.5.1.5 (BRENDA, IUBMB)
• Specific activity: 50,000-100,000 units/g solid

Vlastnosti

• type: Type IX
• Quality Segment: 200
• form: powder
• specific activity: 50,000-100,000 units/g solid
• mol wt: ~544620 Da
• storage temp.: 2-8°C

Popis

General description

Subunit molecular weight: ~90,770
Composed of six subunits with total molecular weight: ~544,620

Urease (Ure) enzyme is present in the cytosol. It is active at acidic pH and is expressed at 28°C. Urease binds to nickel and is present in archaea, bacteria, unicellular eukaryotes and plants. Jack bean urease was the first enzyme to be crystallized and the first enzyme found to contain nickel. It is a multi-subunit enzyme, consisting of 91 kDa subunits in three protein forms.

Application

Urease from Canavalia ensiformis (Jack bean) has been used: to spike urine samples to determine the hydrolysis rate of urea in pure urine It has also been used to study the inhibitory action of polyhalogenated benzo- and naphthoquinones on Bacillus pasteurii and Canavalia ensiformis.

Biochem/physiol Actions

In Canavalia ensiformis (Jack Bean), urease facilitates the conversion of L-canavanine to canaline.

Urease is involved in purine metabolism and the urea cycle. It hydrolyze urea to produce ammonia and carbon dioxide.

Other Notes

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)

Bezpečnostní informace

• Piktogramy: GHS08,GHS07
• Výstražné slovo: Danger
• Kódy nebezpečí: H315,H319,H334,H335
• Bezpečnostní pokyny: P261 - P264 - P271 - P280 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Eye Irrit. 2 - Resp. Sens. 1 - Skin Irrit. 2 - STOT SE 3
• Cílové orgány: Respiratory system
• Skladovací třída: 11 - Combustible Solids
• Co se děje?: WGK 1