An acidic protein aligns magnetosomes along a filamentous structure in magnetotactic bacteria

@article{Scheffel2006AnAP,
  title={An acidic protein aligns magnetosomes along a filamentous structure in magnetotactic bacteria},
  author={Andr{\'e} Scheffel and Manuela Gruska and Damien Faivre and Alexandros A. Linaroudis and J{\"u}rgen M. Plitzko and Dirk Sch{\"u}ler},
  journal={Nature},
  year={2006},
  volume={440},
  pages={110-114}
}
Magnetotactic bacteria are widespread aquatic microorganisms that use unique intracellular organelles to navigate along the Earth's magnetic field. These organelles, called magnetosomes, consist of membrane-enclosed magnetite crystals that are thought to help to direct bacterial swimming towards growth-favouring microoxic zones at the bottom of natural waters. Questions in the study of magnetosome formation include understanding the factors governing the size and redox-controlled synthesis of… Expand
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A total of 28 conserved genes present in various magnetic bacteria were identified to be specifically associated with the magnetotactic phenotype, most of which are located in the genomic magnetosome island. Expand
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  • Biology, Medicine
  • FEMS microbiology reviews
  • 2008
TLDR
A total of 28 conserved genes present in various magnetic bacteria were identified to be specifically associated with the magnetotactic phenotype, most of which are located in the genomic magnetosome island. Expand
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The bacterial magnetosome is a unique prokaryotic organelle comprising magnetic mineral crystals surrounded by a phospholipid bilayer membrane surrounding magnetic crystals of magnetite or greigite, which cause cells of magnetotactic bacteria to passively align and swim along the Earth's magnetic field lines. Expand
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TLDR
The process in which the magnetosome is formed is described with an emphasis on the different proteins that participate in each stage of the magnetOSome formation scheme. Expand
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TLDR
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  • Biology, Medicine
  • Molecular microbiology
  • 2011
TLDR
In Magnetospirillum gryphiswaldense, MamM and MamB, two members of the cation diffusion facilitator (CDF) transport protein family, are required for magnetite formation and MamM increases the stability of MamB by forming a heterodimer, which influences the biomineralization process. Expand
A Bacterial Backbone: Magnetosomes in Magnetotactic Bacteria
Magnetosomes are intracellular, tens of nanometer-sized, membrane-bounded crystals of the magnetic minerals magnetite (Fe3O4) and greigite (Fe3S4) synthesized by a diverse group of prokaryotes termedExpand
A Look into the Biochemistry of Magnetosome Biosynthesis in Magnetotactic Bacteria.
TLDR
The current knowledge on magnetosome biosynthesis is presented with a focus on the different proteins and the main biochemical pathways along this process, including an ensemble of unique proteins that participate in different stages during magnetosomes formation. Expand
Ecology, Diversity, and Evolution of Magnetotactic Bacteria
TLDR
The purpose of this review is focused on the diversity and the ecology of the MTB and also the evolution and transfer of the molecular determinants involved in magnetosome formation. Expand
Magnetosome chain superstructure in uncultured magnetotactic bacteria.
TLDR
An additional level of organization of the magnetosome chains in uncultured magnetotactic cocci found in marine and freshwater sediments is described and it is suggested that genetic determinants that are not present or active in bacteria with magnetosomes randomly rotated within a chain must be present in bacteria that organize magnetosites so precisely. Expand
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Current research is directed towards the biochemical and genetic analysis of MMP functions in magnetite biomineralization as well as their expression and localization during growth. Expand
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The presence of virtually identical magnetosome chains in the eukaryotes is consistent with an inheritance through the process of serial endosymbiosis, and for the geosciences, the magnetic bacteria provide an important supply of fine-grained magnetite to sediments, where they are often used to investigate the past history of the geomagnetic field. Expand
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Together, these results suggest that the magnetosome precisely coordinates magnetite biomineralization and can serve as a model system for the study of organelle biogenesis in noneukaryotic cells. Expand
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Electron microscopic studies on magnetosomes in magnetotactic bacteria have revealed much information on their composition, structure, and even the formation of their mineral phase. The mineralExpand
Inactivation of the Flagellin Gene flaA in Magnetospirillum gryphiswaldense Results in Nonmagnetotactic Mutants Lacking Flagellar Filaments
TLDR
The targeted disruption of the flagellin gene flaA was shown to eliminate flagella formation, motility, and magnetotaxis and will make it possible to take full advantage of the forthcoming genome sequences of M. gryphiswaldense and other magnetotactic bacteria. Expand
A Hypervariable 130-Kilobase Genomic Region of Magnetospirillum gryphiswaldense Comprises a Magnetosome Island Which Undergoes Frequent Rearrangements during Stationary Growth
TLDR
The data suggest that the genomic MAI undergoes frequent transposition events, which lead to subsequent deletion by homologous recombination under physiological stress conditions, which can be interpreted in terms of adaptation to physiological stress and might contribute to the genetic plasticity and mobilization of the magnetosome island. Expand
Characterization of a Spontaneous Nonmagnetic Mutant of Magnetospirillum gryphiswaldense Reveals a Large Deletion Comprising a Putative Magnetosome Island
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Findings suggest the existence of a putative large magnetosome island in M. gryphiswaldense and other magnetotactic bacteria. Expand
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Media and growth conditions were optimized for the microaerobic cultivation of Magnetospirillum gryphiswaldense in flasks and in a fermentor, resulting in significantly increased cell and magnetosome yields, compared with earlier studies, and provide the basis for large-scale cultivation of magnetospirilla under defined conditions. Expand
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Biochemical and Proteomic Analysis of the Magnetosome Membrane in Magnetospirillum gryphiswaldense
TLDR
Several magnetosome proteins found in Magnetospirillum gryphiswaldense display repetitive or highly acidic sequence patterns, which are known from other biomineralizing systems and thus may have relevance for magnetite formation. Expand
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