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Article

Enriched Synthesis of Magnetosomes by Expanding the Magnetospirillum magneticum AMB-1 Culture at Optimal Iron Concentration

1
College of Chemical Engineering, Huaqiao University, Xiamen 361021, China
2
Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen 361021, China
3
Institute of Pharmaceutical Engineering, Huaqiao University, Xiamen 361021, China
*
Author to whom correspondence should be addressed.
Academic Editors: Roberto Zivieri and Evangelos Hristoforou
Magnetochemistry 2021, 7(8), 115; https://doi.org/10.3390/magnetochemistry7080115
Received: 15 June 2021 / Revised: 5 August 2021 / Accepted: 9 August 2021 / Published: 11 August 2021
The Magnetospirillum magneticum AMB-1 species is one of the most widely used magnetotactic bacterial strains for producing magnetosomes under laboratory conditions. Nevertheless, there exist several challenges in expanding and purifying the AMB-1 culture due to the restricted culture conditions. In an attempt to enrich the production of magnetosomes, this study reports the utilization of fermenter culture, which substantially promotes the cell densities at different concentrations of iron content. The experimental results confirmed magnetosomes’ high yield (production rate of 21.1 mg L−1) at the iron content of 0.2 μmol L−1. Moreover, different characterization techniques systematically confirmed the coated lipid membrane, particle size, dispersity, stability, and elemental composition of magnetosomes. Notably, the fermenter culture-based process resulted in highly discrete, dispersed, and stable magnetosomes with an average particle diameter of 50 nm and presented the integrated lipid membrane around the surface. The chemical composition by EDS of magnetosomes represented the presence of various elements, i.e., C, O, Na, P, and Fe, at appropriate proportions. In conclusion, the culture method in our study effectively provides a promising approach towards the culture of the magnetotactic bacterium for the enriched production of magnetosomes. View Full-Text
Keywords: magnetotactic bacterium; expanding culture; magnetic materials; magnetosome characterization magnetotactic bacterium; expanding culture; magnetic materials; magnetosome characterization
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MDPI and ACS Style

Hong, Y.; Kankala, R.K.; Yu, R.; Liu, H.; Liu, Y. Enriched Synthesis of Magnetosomes by Expanding the Magnetospirillum magneticum AMB-1 Culture at Optimal Iron Concentration. Magnetochemistry 2021, 7, 115. https://doi.org/10.3390/magnetochemistry7080115

AMA Style

Hong Y, Kankala RK, Yu R, Liu H, Liu Y. Enriched Synthesis of Magnetosomes by Expanding the Magnetospirillum magneticum AMB-1 Culture at Optimal Iron Concentration. Magnetochemistry. 2021; 7(8):115. https://doi.org/10.3390/magnetochemistry7080115

Chicago/Turabian Style

Hong, Yazhen, Ranjith Kumar Kankala, Ruqi Yu, Huaqing Liu, and Yuangang Liu. 2021. "Enriched Synthesis of Magnetosomes by Expanding the Magnetospirillum magneticum AMB-1 Culture at Optimal Iron Concentration" Magnetochemistry 7, no. 8: 115. https://doi.org/10.3390/magnetochemistry7080115

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