알칼리 내성 Bacillus sp.가 생산하는 Amylase의 생전분 분해 특성

Hydrolysis Characteristics of Amylase from Alkaline-Tolerant Bacillus sp. on the Raw Starch

  • 이신영 (강원대학교 환경·생물공학부 및 연세대학교 생물산업소재연구센터) ;
  • 조택상 ((주) 김정문 알로에 연구소)
  • 발행 : 1998.10.01

초록

The raw starch hydrolysis by amylase prepared from alkaline-tolerant Bacillus sp. were investigated. Degree of hydrolysis(%) of 5%(w/v) raw rice, corn and potato starch by this enzyme were about 40, 25 and 20%, respectively. The hydrolysis action on raw starch by change of blue value was similar to the action pattern of exo ${\beta}$-amylase. The hydrolysis products of rice starch were mainly glucose and maltose. Oligosaccarides were also detected. From the above results, this enzyme was considered as exo type ${\alpha}$-amylase. This enzyme activity on the raw starch and the gelatinized starch were 28.40 and 86.60 IU/mg protein, respectively, and the ratio of raw starch-digesting activity to gelatinized starch-digesting activity (raw starch digestivity) was about 32%. The Km values for the raw and the gelatinized starch were 4.22 and 3.0mg/mL, respectively, and the VmaX values were 0.20 and 0.31mg/mL/min, respectively.

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