C2409

Creatinase from microorganisms

lyophilized powder, ≥4 units/mg solid

• Synonym(e): Creatine Amidinohydrolase
• CAS-Nummer: 37340-58-2
• UNSPSC Code: 12352204
• NACRES: NA.54
• EC Number: 253-471-1
• MDL number: MFCD00130875
• EG-Nummer: 3.5.3.3 (BRENDA, IUBMB)
• Specific activity: ≥4 units/mg solid
• Biological source: bacterial (Actinobacillus spp.)

Eigenschaften

• biological source: bacterial (Actinobacillus spp.)
• Quality Segment: 200
• form: lyophilized powder
• specific activity: ≥4 units/mg solid
• mol wt: ~100 kDa
• storage temp.: −20°C

Beschreibung

General description

Creatinase is a homodimer that catalyzes hydrolysis of creatine.[1] It consists of two monomer subunits and two defined domains; N and C terminal domains.[2] The C-terminal fold has both the α helices and anti-parallel β sheet within two structurally similar domains.[3]In between these two domains, a sulfhydryl group acts as active site, and the activity is metal-independent.[4]

Isoelectric point: 4.6 ± 0.1
Michaelis constant: 1.9 x 10‾²M (Creatine)
Structure: 2 subunits per mole of enzyme
Inhibitors: Cu⁺⁺, Hg⁺⁺, Ag⁺
Optimum pH: 8.0
Optimum temp: 40°C
pH Stability: pH 5.5 − 9.0 (25°C, 16hr)
Thermal stability: Below 50°C (pH 7.5, 30 min)

Application

Creatinase mixed with sarcosine oxidase may be used to determine the level of creatine in different pH, temperature, enzyme ratio, and buffer concentration.[5] It may also be used to determine the plasma creatinine level by using a centrifugal analyser.[6]

Biochem/physiol Actions

Creatinase accelerates the conversion reaction of creatine and water molecule to sarcosine and urea. It always acts in homodimer state and is induced by choline chloride.[7]

Physical form

Lyophilized powder containing sugars and EDTA as stabilizers

Other Notes

One unit will hydrolyze 1.0 μmole of creatine to urea and sarcosine per min at pH 7.5 at 37 °C.

Sicherheitshinweise

• pictograms: GHS08
• signalword: Danger
• hcodes: H334
• pcodes: P261 - P284 - P501
• Hazard Classifications: Resp. Sens. 1
• Lagerklasse: 11 - Combustible Solids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)