کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8360107 1542327 2015 24 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Expression, activation and characterization of porcine trypsin in Pichia pastoris GS115
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Expression, activation and characterization of porcine trypsin in Pichia pastoris GS115
چکیده انگلیسی
Trypsin is a typical member of serine protease families, specifically cleaving the carboxyl group of peptides at the basic amino acids arginine and lysine. The gene fragment of porcine trypsin with its propeptide coding sequence was optimized and synthesized according to the codon usage bias of Pichia pastoris. The optimized sequence was integrated into the genome of P. pastoris GS115 using the vector pHBM905A. The yield of the recombinant protein was 0.48 mg/ml with a maximum activity of 19.2 U/ml after 96-h induction in a 5-l fermenter. An optimum activity for the recombinant trypsin was observed at 35 °C and pH 8.5. This is the first time to express the porcine trypsinogen with P. pastoris expression system. This report also found that the propeptide was cleaved from the recombinant protein and the enzymogen was transferred into trypsin at the later phase of the fed-batch cultivation. In particular, the activation process can be initiated by changing pH.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Protein Expression and Purification - Volume 114, October 2015, Pages 149-155
نویسندگان
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