A <Emphasis Type="Italic">Magnetospirillum</Emphasis> strain WM-1 from a freshwater sediment with intracellular magnetosomes |
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Authors: | Wenbing Li Longjiang Yu Pengpeng Zhou Min Zhu |
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Institution: | (1) College of Life Science & Technology, Huazhong University of Science & Technology, Wuhan, 430074, P.R. China |
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Abstract: | Summary A helical shaped bacterium capable of producing magnetosomes, designated WM-1, was isolated from freshwater sediment through
an improved isolated method that combined magnetic separation and the “race track” method. The strain WM-1 was Gram-negative,
0.2–0.4 μm in diameter and 3–4 μm in length. The strain WM-1 was identified as genus Magnetospirillum in the α-Proteobacteria according to the sequence analysis of the 16S rDNA, the morphology and physiological characteristics.
The shape of the magnetosomes in WM-1was cuboidal by electron microscopy. Statistical analysis of WM-1 magnetosome crystals
showed that the average number of magnetosomes in a WM-1 bacterium was 8 ± 3.4, and the average length was 54 ± 12.3 nm, and
the average width was 43 ± 10.9 nm. |
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Keywords: | Improved isolated method Magnetosome Magnetotactic bacteria 16S rDNA |
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