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zeige Details Mann, Stephen, Sparks, Nicholas H. C., ... Biomineralization of ferrimagnetic greigite (Fe<inf>3</inf>S<inf>4</inf>)and iron pyrite (FeS<inf>2</inf>) in a magnetotactic bacterium
in: Nature . - London [u.a.] : Nature Publising Group, ISSN 1476-4687, Vol. 343, No. 6255 (1990), p. 258-261
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1990
THE ability of magnetotactic bacteria to orientate and navigatealong geomagnetic field lines is due to the controlled intracellular depositionof the iron oxide mineral, magnetite(Fe3O4)1,2. The function and crystalchemical specificity of this mineral has been considered to be unique amongstthe prokaryotes3. Moreover, the bacterial production ofmagnetite may represent a significant contribution to the natural remanentmagnetism of sediments4,5. Here we report, the intracellularbiomineralization of single crystals of the ferrimagnetic iron sulphide,greigite (Fe3S4), in a multicellular magnetotacticbacterium common in brackish, sulphide-rich water and sediment. We show thatthese crystals are often aligned in chains and associated with single crystalsof the non-magnetic mineral, iron pyrite (FeS2). Our results haveimportant implications for understanding biomineralization processes andmagnetotaxis in micro-organisms inhabiting sulphidic environments. Furthermore,the biogenic production of magnetic iron sulphides should beconsidered as a possible source of remanent magnetization in sediments.
beteiligte Personen: Mann, Stephen , Sparks, Nicholas H. C. , Frankel, RichardB. , Bazylinski, DennisA. , Jannasch, HolgerW.
Format: Elektronisch
Erschienen: 1990.
Serie: Nature Archives 1869 - 2007 [Dig. Serial]
Schlagwörter:
URL: http://dx.doi.org/10.1038/343258a0

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zeige Details Bazylizinki, Dennis A., Heywood, Brigid R., ... Fe<inf>3</inf>0<inf>4</inf> and Fe<inf>3</inf>S<inf>4</inf> in a bacterium
in: Nature . - London [u.a.] : Nature Publising Group, ISSN 1476-4687, Vol. 366, No. 6452 (1993), p. 218-218
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zeige Details RICKARD, D. T. Synthesis of Smythite – Rhombohedral Fe<inf>3</inf>S<inf>4</inf>
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zeige Details ROSSITER, M. J., CLARKE, P. T. Cation Distribution in Ulvöspinel Fe<inf>2</inf>TiO<inf>4</inf>
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zeige Details Gorun, Sergiu M., Lippard, Stephen J. A new synthetic approach to the ferritin core uncovers the soluble iron(III) oxo-hydroxo aggregate [Fe<inf>11</inf>O<inf>6</inf>(OH)<inf>6</inf>(O<inf>2</inf>CPh)<inf>15</inf>]
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zeige Details Bazylinski, Dennis A.., Garratt-Reed, Anthony J.., ... Electron microscopic studies of magnetosomes in magnetotactic bacteria
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