Molecular Mechanism of Magnet Formation in Bacteria
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概要
- 論文の詳細を見る
Magnetic bacteria have an ability to synthesize intracellular ferromagnetic crystalline particles consisting of magnetite(Fe_3O_4) or greigite(Fe_3S_4) which occure within a specific size range(50-100nm). Bacterial magnetic particles(BMPs) can be distinguished by the regular morphology and the presence of an thin organic membrane enveloping crystals from abiologically formed magnetite. The particle is the smallest magnetic crystal that has a regular morphology within the single domain size. Therefore, BMPs have an unfathomable amount of potential value for various technological applications not only scientific interests. However, the molecular and genetic mechanism of magnetite biomineralization is hardly understood although iron oxide formation occurs widely in many higher animals as well as microorganisms. In order to elucidate the molecular and genetic mechanisms of magnetite biomineralization, a magnetic bacterium Magnetospirillum sp. AMB-1, for which gene trasfer and transposon mutagenesis techniques had been recently developed, has been used as a model organism. Several findings and information on the BMPs formation process have been obtained within this decade by means of studies with this model organism and its related one. Biomineralization mechanisms and potential availability in biotechnology of bacterial magnets have been elucidated through molecular and genetic approach.
- 公益社団法人日本生物工学会の論文
- 2000-07-25
著者
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Matsunaga Tadashi
Department Of Applid Chemistry For Resources Tokyo University Of Agriculture And Technology
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SAKAGUCHI Toshifumi
Department of Nephrology and Blood Purification Medicine, Wakayama Medical University
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Sakaguchi Toshifumi
Department of Biotechnology, Tokyo University of Agriculture and Technology
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