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猪肝中单胺氧化酶B的分离纯化

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Indexed by:期刊论文

Date of Publication:2010-09-28

Journal:色谱

Included Journals:Scopus、PubMed、PKU、ISTIC、CSCD

Volume:28

Issue:9

Page Number:872-876

ISSN No.:1000-8713

Key Words:苯基配基;疏水色谱;阴离子交换色谱;单胺氧化酶B;猪肝

Abstract:依据单胺氧化酶B(monoamine oxidase B, MAOB)的疏水特性,建立了一种从猪肝中分离纯化MAOB的新方法.用含有1% Triton X-100的膜蛋白裂解液制备粗酶,以饱和度为20%~50%的硫酸铵反抽提进行粗提,再利用自制的配基密度为75.7 μmol/mL的苯基疏水色谱及Sepharose Q High Performance离子交换色谱进一步分离纯化,得到纯化倍数为18.2、酶比活为135 U/mg的MAOB.十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(SDS-PAGE)分析显示为相对分子质量约60 000的单一蛋白质带.采用高效液相色谱-电喷雾串联质谱对该酶进行鉴定,证实为MAOB.本研究所用分离纯化方法可以有效纯化MAOB, 为MAOB的深入研究提供技术支撑.

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