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Optimization of Production of Trehaolse from Maltose using Recombinant Trehalose Synthase from Thermus caldophilus GK24  

조연정 (한국생명공학연구원 바이오벤처센터 ㈜엔지뱅크)
고석훈 (한국생명공학연구원 바이오벤처센터 ㈜엔지뱅크)
이대실 (한국생명공학연구원 미생물 유전체 연구실)
신현재 (한국생명공학연구원 바이오벤처센터 ㈜엔지뱅크)
Publication Information
KSBB Journal / v.18, no.1, 2003 , pp. 8-13 More about this Journal
Abstract
Recombinant trehalose synthase from Thermus caldophilus GK24 showed an ability to produce trehalose from maltose. The activity of the partially purified enzyme was not influenced by most metal ions at 1 mM but was inhibited by 10 mM $Co^{2+}$, $Mn^{2+}$, and $Fe^{2+}$. Enzyme activity varied during prolonged reaction due to changes in the environmental conditions. Thus, the reaction was carried out for an extended time with optimized conditions of $45^{\circ}C$ and pH 7.0. An yield of 32.9% was reached at $60^{\circ}C$ after reaction for 22 h, and, maximum trehalose conversion (69.2%) was attained at $25^{\circ}C$. The yields obtained using enzyme dosages of 10, 25, and 50 U/g were 62.3, 62.3 and 59.0 %, respectively, though the initial conversion rate was higher when the higher dose was used. Similar profiles of trehalose production yields were observed with reaction working volumes of 10 ml to 2,000 ml.
Keywords
Trehalose; trehalose synthase; Thermus caldophilus; enzyme reaction;
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