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Yang J, Yu Y, Tang BL, Zhong S, Shi M, Xie BB, Zhang XY, Zhou BC, Zhang YZ, Chen XL. Pilot-Scale Production and Thermostability Improvement of the M23 Protease Pseudoalterin from the Deep Sea Bacterium Pseudoalteromonas sp. CF6-2. Molecules 2016; 21:molecules21111567. [PMID: 27869696 PMCID: PMC6273387 DOI: 10.3390/molecules21111567] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 11/09/2016] [Accepted: 11/14/2016] [Indexed: 01/05/2023] Open
Abstract
Pseudoalterin is the most abundant protease secreted by the marine sedimental bacterium Pseudoalteromonas sp. CF6-2 and is a novel cold-adapted metalloprotease of the M23 family. Proteases of the M23 family have high activity towards peptidoglycan and elastin, suggesting their promising biomedical and biotechnological potentials. To lower the fermentive cost and improve the pseudoalterin production of CF6-2, we optimized the fermentation medium by using single factor experiments, added 0.5% sucrose as a carbon source, and lowered the usage of artery powder from 1.2% to 0.6%. In the optimized medium, pseudoalterin production reached 161.15 ± 3.08 U/mL, 61% greater than that before optimization. We further conducted a small-scale fermentation experiment in a 5-L fermenter and a pilot-scale fermentation experiment in a 50-L fermenter. Pseudoalterin production during pilot-scale fermentation reached 103.48 ± 8.64 U/mL, 77% greater than that before the medium was optimized. In addition, through single factor experiments and orthogonal tests, we developed a compound stabilizer for pseudoalterin, using medically safe sugars and polyols. This stabilizer showed a significant protective effect for pseudoalterin against enzymatic thermal denaturation. These results lay a solid foundation for the industrial production of pseudoalterin and the development of its biomedical and biotechnological potentials.
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Affiliation(s)
- Jie Yang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Yang Yu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Bai-Lu Tang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Shuai Zhong
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Mei Shi
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Bin-Bin Xie
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Xi-Ying Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Bai-Cheng Zhou
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
| | - Yu-Zhong Zhang
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.
| | - Xiu-Lan Chen
- State Key Laboratory of Microbial Technology, Shandong University, Jinan 250100, China.
- Marine Biotechnology Research Center, Shandong University, Jinan 250100, China.
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