A simple method for purification of bromelain in a thermosensitive triblock copolymer-based protection system and recycling of phase components

A simple method for purification of bromelain in a thermosensitive triblock copolymer-based protection system and recycling of phase components
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热敏三嵌段共聚物保护体系中菠萝蛋白酶纯化和相组分回收的简单方法

DOI:
10.1080/01496395.2017.1398757
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发表时间:
2018-03
影响因子:
2.8
通讯作者:
Ni Liang
Ni Liang
中科院分区:
工程技术4区
文献类型:
--
作者:
Han Juan;Cai Yunfeng;Xie Xueqiao;Wang Yun;Wang Li;Li Cheng;Rao Wenwei;Ni Liang

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摘要本研究以菠萝皮茎蛋白酶为模型,对菠萝皮中菠萝蛋白酶的保存和纯化进行了研究。采用热分离共聚物EOPOEO和K2HPO4组成的两级双水相萃取体系从菠萝皮中提取菠萝蛋白酶。菠萝蛋白酶主要分配到富含EOPOEO的相中,然后再萃取到顶部稀相。在最佳条件下,酶活回收率为68.6%,纯化倍数为6.53。EOPOEO富集相和盐循环使用,酶活回收率可达60%以上。该方法可获得纯度高、稳定性好的菠萝蛋白酶。
ABSTRACT In the work, we chose stem bromelain as a model to investigate the storage and purification of bromelain from pineapple peel. Extraction of bromelain from pineapple peel using a two-stage aqueous two-phase extraction system composed of a thermoseparating copolymer EOPOEO and K2HPO4. Bromelain predominantly partitioned to the EOPOEO-rich phase and then re-extract to the top dilute phase. The recovery of enzyme activity (68.6%) and purification factor (6.53) were determined under optimum conditions. The EOPOEO-rich phase and salt were recycled, and the recovery of enzyme activity could reach up to 60%. This method has been proved to obtain highly purified and stable bromelain.
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