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Enzyme Kinetic Study for Degradation of Phytic acid by Phytase

Phytase에 의한 phytic acid의 분해 반응속도 연구

  • Kim, Jae-Seok (School of Mechanical Engineering, Korea University of Technology and Education) ;
  • Lee, Jae-Heung (School of Mechanical Engineering, Korea University of Technology and Education)
  • 김재석 (한국기술교육대학교 기계정보공학부) ;
  • 이재흥 (한국기술교육대학교 기계정보공학부)
  • Received : 2011.03.03
  • Accepted : 2011.04.21
  • Published : 2011.08.30

Abstract

Phytases are hydrolytic enzymes that catalyze the sequential hydrolysis of phytic acid (myo-inositol-1,2,3,4,5,6-hexakisphosphate) to myo-inositols with lower numbers of phosphate groups. Two types of phytases have been identified which initiate hydrolysis of the phytic acid at either the 3- or 6- position of the inositol ring. In the present investigation, a mathematical model was proposed and computed to estimate maximum enzyme reaction rate constants which fit the experimental data obtained by other authors. Although the data points were scattered to some extent, good agreement was found between the model and the experiment data. It appears that the maximum rate constants of removal of the first, second, and third phosphate groups were not equal. Also there was neither a steady trend upward or downward in the rate constants with the stepwise hydrolysis reactions.

Keywords

References

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