کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2020167 1542317 2016 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhancement of extracellular expression of Bacillus naganoensis pullulanase from recombinant Bacillus subtilis: Effects of promoter and host
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Enhancement of extracellular expression of Bacillus naganoensis pullulanase from recombinant Bacillus subtilis: Effects of promoter and host
چکیده انگلیسی
Pullulanase plays an important role in industrial applications of starch processing. However, extracellular production of pullulanase from recombinant Bacillus subtilis is yet limited due to the issues on regulatory elements of B. subtilis expression system. In this study, the gene encoding B. naganoensis pullulanase (PUL) was expressed in B. subtilis WB800 under the promoter PHpaII in the shuttle vector pMA0911. The extracellular activity of expressed pullulanase was 3.9 U ml−1 from the recombinant B. subtilis WB800/pMA0911-PHpaII-pul. To further enhance the yield of PUL, the promoter PHpaII in pMA0911 was replaced by a stronger constitutive promoter P43. Then the activity was increased to 8.7 U ml−1 from the recombinant B. subtilis WB800/pMA0911-P43-pul. Effect of host on pullulanase expression was further investigated by comparison between B. subtilis WB600 and B. subtilis WB800. In addition to the available B. subtilis WB800 recombinants, the constructed plasmids pMA0911-PHpaII-pul and pMA0911-P43-pul were transformed into B. subtilis WB600, respectively. Consequently, the extracellular production of PUL was significantly enhanced by B. subtilis WB600/pMA0911-P43-pul, resulting in the extracellular pullulanase activity of 24.5 U ml−1. Therefore, promoter and host had an impact on pullulanase expression and their optimization would be useful to improve heterologous protein expression in B. subtilis.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Protein Expression and Purification - Volume 124, August 2016, Pages 23-31
نویسندگان
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