کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2021898 1069267 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Expression, purification, and characterization of recombinant Metarhizium anisopliae acid trehalase in Pichia pastoris
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Expression, purification, and characterization of recombinant Metarhizium anisopliae acid trehalase in Pichia pastoris
چکیده انگلیسی
The mature peptide of Metarhizium anisopliae acid trehalase (ATM1) (EC3.2.1.28) was successfully expressed in Pichia pastoris at high levels under the control of AOX1 promoter. The recombinant ATM1 (reATM1) was secreted into culture medium. After 48-h 0.5% methanol induction, the activity of reATM1 in the culture supernatant reached the peak, 5.35 U/mg. Enzyme with a histidine sequence appended to the C terminus was still active and was purified using metal-chelate affinity chromatography. The yield of purified reATM1 was 2.5 mg from 1 L supernatant. The purified reATM1 exhibited a molecular mass of approximately 170 kDa on SDS-PAGE. The optimum temperature and pH of reATM1 were 30 °C and 6.0, respectively, and the Km and Vmax values for reATM1 were 2.6 mM and 0.305 mmol/min/mg, respectively. Studies showed that the enzymatic properties of reATM1 were similar to those of the native ATM1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Protein Expression and Purification - Volume 54, Issue 1, 1 July 2007, Pages 66-72
نویسندگان
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