Designing lipase‐compatible ionic liquids as novel solvents for starch ester biosynthesis

Designing lipase‐compatible ionic liquids as novel solvents for starch ester biosynthesis
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设计脂肪酶相容的离子液体作为淀粉酯生物合成的新型溶剂

DOI:
10.1002/star.201900120
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发表时间:
2019
期刊:
Starch/Starke
影响因子:
--
通讯作者:
Yaoqi Tian
Yaoqi Tian
中科院分区:
其他
文献类型:
--
作者:
Jinling Zhan;Xiwen Zhang;Rongrong Ma;Yaoqi Tian

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淀粉在离子液体中的酶促酯化反应在食品工业中得到了广泛的关注。然而,离子液体通常使酶变性,限制淀粉酯化。本文设计了两种既能促进淀粉溶解又能保持酶活性的新型离子液体。在IL中,淀粉溶解度在100 °C下从<0.5wt%增加到10wt%以上,并且保持酶稳定性。为了评估离子液体在酶促淀粉酯化中的应用,在离子液体中添加Novozyme 435合成了两种类型的淀粉酯。淀粉酯在离子液体中的取代度(DS)值高于在DMSO中。在最佳工艺条件下,棕榈酸淀粉酯和硬脂酸淀粉酯的最大取代度分别达到0.153和0.138。此外,IL可以容易地回收。这些结果表明,离子液体与烯丙基,烷氧基基团,乙酸根阴离子可能是潜在的环境友好的溶剂酶淀粉酯化。
The enzymatic esterification of starch in ionic liquids (ILs) has gained considerable attention in the food industry. However, ILs usually denature enzymes, limiting starch esterification. Herein, two novel ILs that promote starch dissolution and maintained enzyme activity are designed. In the ILs, starch solubility increases from <0.5 wt% to above 10 wt% at 100 °C, and enzyme stability is maintained. To assess the application of the ILs in enzymatic starch esterification, two types of starch esters are synthesized in the ILs with the addition of Novozyme 435. The degree of substitution (DS) value of starch esters is higher in the ILs than in DMSO. The maximum DS value of starch palmitate and starch stearate reach 0.153 and 0.138, under the optimum conditions. Also, the ILs can be easily recycled. These findings suggest that ILs with allyl, alkyloxy groups, and acetate anions could be potential environmentally friendly solvents for enzymatic starch esterification.
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