Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8359520 | Protein Expression and Purification | 2018 | 34 Pages |
Abstract
Luciferase from Renilla reniformis (RLuc) is a good research tool as a reporter protein and bioimaging probes, yielding blue light using the substrate coelenterazine. However, the applications are limited since RLuc is unstable under various conditions. Therefore, an attempt was made to increase RLuc thermostability. In this study, 5 mutations reported previously [1] and one mutation obtained using site-directed mutagenesis were combined. As a result of this combination, the thermostability effect increased, with the mutant showing approximately 10â¯Â°C higher stability. Furthermore, the mutant simultaneously improved a tolerance for protease digestion, e.g. trypsin and proteinase K, and for organic solvent. Residual activity of the mutant after treatment with 10% 2-propanol, 10% DMF and 20% DMSO at 35â¯Â°C for 1â¯h was 29.4, 24.8 and 91.3%, respectively, whereas that of the wild type was 0.4, 0.1 and 24.3%, respectively.
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Authors
Matsujiro Ishibashi, Ryo Kawanabe, Norie Amaba, Shigeki Arai, Fina Amreta Laksmi, Kenta Komori, Masao Tokunaga,