친화성 크로마토그래피를 이용한 글루코오스 옥시다아제의 정제와 효소특성

Purification of Glucose Oxidase by Affinity Chromatography and Its Characterization

  • Ko Jung Hwan (Department of Biological Science and Engineering) ;
  • Byun Si Myung (Department of Biological Science and Engineering)
  • 발행 : 1979.06.30

초록

토양중에서 분리한 Penicillium속이 생산하는 글루코오스 옥시타아제를 친화성 크로마토그래피에 의해 정제하고, 이 효소의 특성을 알아보았다. D-Gluconyl-${\omega}$-aminohexyl Sepharose컬럼을 사용하여 친화성 크로마토그래피를 행한 결과 14.6배 정제되었고 수율은 79%였으나 카탈라아제가 소량 함유되어 있어서 Sepharose 6B 겔 여과를 행하여 이를 제거하였다. 이 결과 27.2배 정제되고 수율이 74.1%인 정제효소를 얻었으며 7% polyacrylamide 겔 전기영동 결과 단일대를 보여주었고 비활성도는 단백질 mg당 90.83U였다. 정제된 효소의 흡광스펙트럼과 기질에 대한 특이성을 조사하였으며 최적 pH는 5.6∼6.0, 최적온도는 $40^{\circ}C$, D-글루코오스에 대한 $K_m$값은 $8.5{\times}10^{-3}M$, 활성화에너지는 3.43 kcal/mole이었다.

A purification technique of glucose oxidase was developed. Using the gluconyl-${\omega}$-aminohexyl Sepharose affinity chromatography, it was partially purified 14.6 folds with 79.7% yield. With the combination of the affinity chromatography and Sepharose 6B gel filtration, the enzyme was purified 27.2 folds from the broth with 74.1% yield. The final purified preparation showed 90.83 U of glucose oxidase activity per mg of protein and a single band by 7% polyacrylamide gel electrophoresis. The absorption spectrum and substrate specificity of the enzyme were studied and the fianal preparation showed the optimal pH between 5.6 and 6.0, the optimal temperature at $40^{\circ}C$, $8.5{\times}10^{-3}M$ of $K_m$ for D-glucose, and 3.43 kcal/mole of the activation energy.

키워드

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