文献类型：期刊文献

英文题名：Identification and characterization of a novel esterase from Thauera sp.

作者：Yu, Niu[1] Yang, Jin-chang[1] Yin, Guang-tian[1] Li, Rong-sheng[1] Zou, Wen-tao[1] He, Chang[1]

第一作者：余纽

通信作者：Yu, N[1]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China

年份：2018

卷号：65

期号：5

起止页码：748-755

外文期刊名：BIOTECHNOLOGY AND APPLIED BIOCHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000447122500011)】；

基金：This work was supported by Fundamental Research Funds of Chinese Academy of Forestry (CAFYBB2017SY023) and National Natural Science Foundation of China (31600538). The authors declare that they have no competing interests.

语种：英文

外文关键词：Thauera; GDSL; SGNH family; Esterase

摘要：A novel esterase gene TLip was identified from the strain Thauera sp. and expressed at high levels in Escherichia coli. The TLip protein shared the highest identity (48%) to esterase TesA from Pseudomonas aeruginosa when compared to enzymes with reported properties. Phylogenetic analysis showed that TLip belongs to the GDSL family of bacterial lipolytic enzymes. TLip was an alkaline esterase with a broad optimal temperature range 37-50 degrees C and an optimal pH of 8.0. Substrate specificity assays showed that TLip preferred medium chain p-nitrophenyl esters (C-6-C-12). Besides, the activity of TLip was strongly inhibited by Cu2+ but greatly enhanced by Triton X-100 and Tween 80. Thermostability assay revealed that TLip was stable without loss of activity at 37 degrees C and still retained 69% activity at 50 degrees C after 2 H of incubation. Together, these provided a good candidate for further exploration of TLip as a promising biocatalyst in industry.