National Taiwan Ocean University Institutional Repository:Item 987654321/27026
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题名: Cloning, Expression, and Characterization of a Thioredoxin Reductase cDNA from Taiwanofungus camphorata
作者: Chih-Yu Huang;Chuian-Fu Ken;Hsiang-Hui Chi;Lisa Wen;Chi-Tsai Lin
贡献者: NTOU:Institute of Bioscience and Biotechnology
國立臺灣海洋大學:生物科技研究所
关键词: Taiwanofungus camphorata;three-dimensional (3-D) homology structure;thioredoxin reductase (TR);dithionitrobenzoate [DTNB, 5-5-dithiobis(2-nitrobenzoic acid)];thioredoxin (Trx)
日期: 2010
上传时间: 2011-10-21T02:22:21Z
出版者: Journal of Agricultural and Food Chemistry
摘要: Abstract:A cDNA encoding putative thioredoxin reductase (TR) was identified from a medicinal mushroom, Taiwanofungus camphorata (T. camphorata). Alignment of the deduced amino acid sequence with TRs from other organisms showed high levels of identity (59−74%). A three-dimensional (3-D) homology structure was created for this TR. Functional T. camphorata TR (TcTR) was overexpressed in yeast and purified. The purified enzyme showed a monomic form on a 10% sodium dodecyl sulfate−polyacrylamide gel electrophoresis (SDS−PAGE). The enzyme’s half-life of deactivation at 60 °C was 12.9 min, and its thermal inactivation rate constant Kd was 5.37 × 10−2 min−1. The optimal pH for the enzyme was pH 8 and retained about 76% activity in the presence of 0.1 M imidazole. The enzyme showed 50% activity after 10 min of incubation at 37 °C with chymotrypsin. The Michaelis constant (Km) value for dithionitrobenzoate (DTNB) was 1.59 mM.
關聯: 58(8), pp.4825–4830
URI: http://ntour.ntou.edu.tw/handle/987654321/27026
显示于类别:[生命科學暨生物科技學系] 期刊論文

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