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| Content Provider | PubMed Central |
|---|---|
| Author | Gong, Jin-song Li, Wei Zhang, Dan-dan Xie, Min-feng Yang, Biao Zhang, Rong-xian Li, Heng Lu, Zhen-ming Xu, Zheng-hong Shi, Jin-song |
| Editor | Tikkanen, Ritva |
| Copyright Year | 2015 |
| Abstract | In the present study, we isolated a trypsin-producing strain DMN6 from the leather waste and identified it as Bacillus licheniformis through a two-step screening strategy. The trypsin activity was increased up to 140 from 20 U/mL through culture optimization. The enzyme was purified to electrophoretic homogeneity with a molecular mass of 44 kDa by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and the specific activity of purified enzyme is 350 U/mg with Nα-Benzoyl-l-arginine ethylester as the substrate. The optimum temperature and pH for the trypsin are 65 °C and pH 9.0, respectively. Also, the enzyme can be significantly activated by Ba2+. This enzyme is relatively stable in alkaline environment and displays excellent activity at low temperatures. It could retain over 95% of enzyme activity after 180 min of incubation at 45 °C. The distinguished activity under low temperature and prominent stability enhance its catalytic potential. In the current work, the open reading frame was obtained with a length of 1371 nucleotides that encoded a protein of 456 amino acids. These data would warrant the B. licheniformis trypsin as a promising candidate for catalytic application in collagen preparation and leather bating through further protein engineering. |
| Related Links | http://dx.doi.org/10.3390/ijms161226200 |
| Ending Page | 30074 |
| Starting Page | 30061 |
| File Format | |
| ISSN | 14220067 |
| e-ISSN | 14220067 |
| Journal | International Journal of Molecular Sciences |
| Issue Number | 12 |
| Volume Number | 16 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2015-12-17 |
| Access Restriction | Open |
| Rights Holder | MDPI |
| Subject Keyword | Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Spectroscopy Organic Chemistry Medicine Molecular Biology Physical and Theoretical Chemistry Catalysis Inorganic Chemistry Computer Science Applications |
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