Creatinase (C2-AT) クレアチナーゼ(C2-AT)

  • 臨床診断用酵素

臨床検査において、クレアチンおよびクレアチニンの測定に利用されます。

由来 recombinant E. coli
系統名

Creatine amidinohydrolase

EC 番号 3.5.3.3
反応式

Creatine + H2O →→→ Sarcosine + Urea

仕様

Appearance white lyophilizate
Activity ≧9 U/mg lyophilizate
Contaminant catalase <0.5%
Stabilizer sucrose
Storage below -20℃

特性

Molecular weight ca. 80 kDa (gel filtration)
Structure 2 subunits of 48 kDa (SDS-PAGE)
Michaelis constant 8.6×10-3M (creatine)
pH Optimum 7.0–9.0
pH Stability 4.0–11.0
Optimum temperature 45℃
Thermal stability below 53℃
Stability (liquid form) stable at 37℃ for at least two weeks
Stability (powder form) stable at 30℃ for at least one month
Inhibitors Hg2+

アプリケーション

The enzyme is useful for the determination of creatinine and creatine in clinical analysis.

参考文献

  • Suzuki, M., Medical Technology, 7, 945–950 (1979).
  • Suzuki, M. and Yoshida, M., Clin. Chim. Acta, 140, 289–294 (1984).
  • Suzuki, M. and Yoshida, M., Clin. Chim. Acta, 143, 147–155 (1984).

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