The use of organic solvents as reaction media for enzymatic reactions has many advantages. Several organic solvents have been proposed as reaction media, especially for transesterifications using Candida antarctica lipase B (CalB). Among organic solvents, tert-butanol is associated with an enhanced conversion rate in biodiesel production. Thus, it is necessary to understand the effect of tert-butanol on CalB to explain the high catalytic efficiency compared with the reaction in other hydrophilic organic solvents. In this study, the effects of tert-butanol on the structure of CalB were investigated by MD simulations. The overall flexibility was increased in the presence of tert-butanol. The substrate entrance and the binding pocket size of CalB in tert-butanol were maintained as in TIP3P water. The distance between the catalytic residues of CalB in tert-butanol indicated a higher likelihood of forming hydrogen bonds. These structural analyses could be useful to understand the effect of tert-butanol effect transesterification by lipases.
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
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