Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/117562
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Type: | Journal article |
Title: | Identification of a new marine bacterial strain SD8 and optimization of its culture conditions for producing alkaline protease |
Author: | Cui, H. Yang, M. Wang, L. Xian, C.J. |
Citation: | PLoS One, 2015; 10(12):e0146067-1-e0146067-13 |
Publisher: | PLoS - Public Library of Science |
Issue Date: | 2015 |
ISSN: | 1932-6203 1932-6203 |
Editor: | Lesner, A. |
Statement of Responsibility: | Hongxia Cui, Muyang Yang, Liping Wang, Cory J. Xian |
Abstract: | While much attention has been given to marine microorganisms for production of enzymes, which in general are relatively more stable and active compared to those from plants and animals, studies on alkaline protease production from marine microorganisms have been very limited. In the present study, the alkaline protease producing marine bacterial strain SD8 isolated from sea muds in the Geziwo Qinhuangdao sea area of China was characterized and its optimal culture conditions were investigated. Strain SD8 was initially classified to belong to genus Pseudomonas by morphological, physiological and biochemical characterizations, and then through 16S rDNA sequence it was identified to be likely Pseudomonas hibiscicola. In addition, the culture mediums, carbon sources and culture conditions of strain SD8 were optimized for maximum production of alkaline protease. Optimum enzyme production (236U/mL when cultured bacteria being at 0.75 mg dry weight/mL fermentation broth) was obtained when the isolate at a 3% inoculum size was grown in LB medium at 20 mL medium/100mL Erlenmeyer flask for 48h culture at 30°C with an initial of pH 7.5. This was the first report of strain Pseudomonas hibiscicola secreting alkaline protease, and the data for its optimal cultural conditions for alkaline protease production has laid a foundation for future exploration for the potential use of SD8 strain for alkaline protease production. |
Keywords: | Aquatic Organisms |
Rights: | Copyright: © 2015 Cui et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
DOI: | 10.1371/journal.pone.0146067 |
Grant ID: | NHMRC |
Published version: | http://dx.doi.org/10.1371/journal.pone.0146067 |
Appears in Collections: | Aurora harvest 8 Medicine publications |
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hdl_117562.pdf | Published Version | 1.08 MB | Adobe PDF | View/Open |
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