您好，欢迎访问山西省农业科学院 机构知识库！
山西省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Ester-Producing Mechanism of Ethanol O-acyltransferase EHT1 Gene in Pichia pastoris from Shanxi Aged Vinegar

文献类型： 外文期刊

作者： Chen, Jia 1 ; Nan, Ruipeng 2 ; Wang, Rufu 3 ; Zhang, Lixin 4 ; Shi, Junfeng 4 ;

作者机构： 1.Shanxi Agr Univ, Coll Hort Sci, Taigu 030801, Shanxi, Peoples R China

2.Shanxi Agr Univ, Coll Anim Sci & Vet Med, Taigu 030801, Shanxi, Peoples R China

3.Shanxi Agr Univ, Coll Food Sci & Engn, Taigu 030801, Shanxi, Peoples R China

4.Shanxi Acad Agr Sci, Inst Farm Prod Storage & Fresh Keeping, Taiyuan 030031, Shanxi, Peoples R China

期刊名称：BIOMED RESEARCH INTERNATIONAL （ 影响因子：3.411； 五年影响因子：3.62 ）

ISSN： 2314-6133

年卷期： 2019 年

页码：

收录情况： SCI

摘要： The ethanol O-acyltransferase EHT1 is an important element of key signaling pathways and is widely expressed in yeast strains. In this study, we investigated the expression of EHT1 in the overexpression lines or knockout system of Pichia pastoris using qRT-PCR and western blotting. The amount of total protein was determined using the Bradford method; the esterase activity was determined using p-nitrophenyl acetate as a substrate, and the production of volatile fatty acids in wild-type, knockout, and over-expression systems was detected using SPME GC-MS. The esterase activity of EHT1-knockout P. pastoris was significantly lower than that in wild type (P<0.01), and the activities of esterase in three EHT1-overexpressing strainsOE-1, OE-2, and OE-3were significantly higher than those in wild type (P<0.01). In the EHT1-knockout strain products, the contents of nine volatile fatty acids were significantly lower than those in wild type (P<0.01), and the relative percentages of three fatty acids, methyl nonanoate, methyl decanoate, and ethyl caprate, were significantly lower than those in the other six species in the wild-type and knockout groups (P<0.05). The nine volatile fatty acids in the fermentation products of the overexpressed EHT1 gene were significantly higher than those in the wild-type group (P<0.01). The relative percentages of the three fatty acid esters, methyl nonanoate, methyl caprate, and ethyl caprate, were significantly higher than those in the other six species (P<0.05). EHT1 plays an important regulatory role in esterase activity and the production of medium-chain volatile fatty acids.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：山西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台