Magnetosome vesicles are present before magnetite formation, and MamA is required for their activation. Komeili, A.; Vali, H.; Beveridge, T. J.; and Newman, D. K. Proceedings of the National Academy of Sciences of the United States of America, 101(11):3839--3844, March, 2004.
Magnetosome vesicles are present before magnetite formation, and MamA is required for their activation [link]Paper  doi  abstract   bibtex   
Bacterial magnetosomes are intracellular compartments that house highly ordered magnetite crystals. By using Magnetospirillum sp. AMB-1 as a model system, we show that magnetosome vesicles exist in the absence of magnetite, biomineralization of magnetite proceeds simultaneously in multiple vesicles, and biomineralization proceeds from the same location in each vesicle. The magnetosome-associated protein, MamA, is required for the formation of functional magnetosome vesicles and displays a dynamic subcellular localization throughout the growth cycle of magnetotactic bacteria. 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.
@article{komeili_magnetosome_2004,
	title = {Magnetosome vesicles are present before magnetite formation, and {MamA} is required for their activation},
	volume = {101},
	issn = {0027-8424, 1091-6490},
	url = {http://www.pnas.org/content/101/11/3839},
	doi = {10.1073/pnas.0400391101},
	abstract = {Bacterial magnetosomes are intracellular compartments that house highly ordered magnetite crystals. By using Magnetospirillum sp. AMB-1 as a model system, we show that magnetosome vesicles exist in the absence of magnetite, biomineralization of magnetite proceeds simultaneously in multiple vesicles, and biomineralization proceeds from the same location in each vesicle. The magnetosome-associated protein, MamA, is required for the formation of functional magnetosome vesicles and displays a dynamic subcellular localization throughout the growth cycle of magnetotactic bacteria. 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.},
	language = {en},
	number = {11},
	urldate = {2013-03-18TZ},
	journal = {Proceedings of the National Academy of Sciences of the United States of America},
	author = {Komeili, Arash and Vali, Hojatollah and Beveridge, Terrance J. and Newman, Dianne K.},
	month = mar,
	year = {2004},
	pages = {3839--3844}
}
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