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Amberlite IRA-900을 이용한 cyclodextrin glucotransferase의 최적 고정화
Optimization of Cyclodextrin Glucanotransferase Immobilization on Amberlite IRA-900

Seo, Hyo-Jin   (Dept. of Biotechnology and Bioengineering, Pukyong National UniversityUU0000598  ); Jung, Il-Hyong   (Dept. of Biotechnology and Bioengineering, Pukyong National UniversityUU0000598  ); Nam, Soo-Wan   (Dept. of Biotechnology and Bioengineering, Pukyong National UniversityUU0000598  ); Kim, Byung-Woo   (Dept. of Biotechnology and Bioengineering, Pukyong National UniversityUU0000598  ); Kim, Sung-Koo   (Dept. of Biotechnology and Bioengineering, Pukyong National UniversityUU0000598  );
  • 초록

    Bacillus subtilis NAl/pKBl으로부터 생산된 cyclodextrin glucanotransferase (CGTase)는 cyclodextrin (CD)의 생산에 이용되었으며, 이에 사용된 CGTase는 ion-exchange chromatography와 gel filtration chromatography에 의해 정제되었다. 정제된 CGTase는 pH 6.0-7.0 범위, 60- $70^{\circ}C$ 에서 최대 활성을 나타내었으며, 다양한 이온결합성 고정화 담체를 이용하여 정제 효소의 고정화를 실시한 결과, 강염기성 음이온교환수지인 Amberlite IRA-900이 가장 우수한 고정화 효율을 나타내었다. 고정화된 효소는 pH 6.0, $60^{\circ}C$ 에서 최대 활성을 나타내었고, 그 활성이 약 1개월간 유지되어 cyclodextrin을 생산하기 위한 연속반응기내에서 장기간 사용이 가능함을 알 수 있었다.


    Cyclodextrin glucanotransferase (CGTase) produced by Bacillus subtilis NAl/pKBl was used for the production of cyclodextrin (CD). The enzyme was purified by ion exchange and gel filtration chromatography. The purified enzyme exhibited its maximum activity in the pH range of 6.0 to 7.0 and temperature range of 60 to $70^{\circ}C$ . Immobilization of purified CGTase was carried out with various immobilization matrices. Amberlite IRA-900, a strong basic anion exchange resin, showed the highest immobilization ability (38 units per gram resin). Optimal pH and temperature for enzymatic reaction of the immobilized CGTase were pH 6.0 and 60t. The activity of immobilized CGTase maintained more than a month and could be reused for a month in a continuous enzyme reactor for the production of CD.


  • 주제어

    CGTase .   Immobilization .   Amberlite IRA-900 .   Cyclodextrin .   Bacillus subtilis.  

  • 참고문헌 (17)

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