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Controlled biomineralization of magnetite (Fe3O4) and greigite (Fe3S4) in a magnetotactic bacterium
Citation
Bazylinski, DA and Frankel, RB and Heywood, BR and Mann, S and King, JW and Donaghay, PL and Hanson, AK, Controlled biomineralization of magnetite (Fe3O4) and greigite (Fe3S4) in a magnetotactic bacterium, Applied and Environmental Microbiology, 61, (9) pp. 3232-3239. ISSN 0099-2240 (1995) [Refereed Article]
Copyright Statement
Copyright 1995 American Society for Microbiology
Official URL: http://aem.asm.org/content/61/9/3232.full.pdf+html
DOI: doi:10.1128/AEM.61.9.3232-3239.1995
Abstract
A slowly moving, rod-shaped magnetotactic bacterium was found in relatively large numbers at and below the oxic-anoxic transition zone of a semianaerobic estuarine basin. Unlike all magnetotactic bacteria described to date, cells of this organism produce single-magnetic-domain particles of an iron oxide, magnetite (Fe3O4), and an iron sulfide, greigite (Fe3S4), within their magnetosomes. The crystals had different morphologies, being arrowhead or tooth shaped for the magnetite particles and roughly rectangular for the greigite particles, and were coorganized within the same chain(s) in the same cell with their long axes along the chain direction. Because the two crystal types have different crystallochemical characteristics, the findings presented here suggest that the formation of the crystal types is controlled by separate biomineralization processes and that the assembly of the magnetosome chain is controlled by a third ultrastructural process. In addition, our results show that in some magnetotactic bacteria, external environmental conditions such as redox and/or oxygen or hydrogen sulfide concentrations may affect the composition of the nonmetal part of the magnetosome mineral phase.
Item Details
Item Type: | Refereed Article |
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Keywords: | iron derivative, magnetite, bacterium isolation, crystal structure, magnetic field, mineralization, nonhuman, prokaryote |
Research Division: | Biological Sciences |
Research Group: | Biochemistry and cell biology |
Research Field: | Structural biology (incl. macromolecular modelling) |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the biological sciences |
UTAS Author: | Heywood, BR (Professor Brigid Heywood) |
ID Code: | 104439 |
Year Published: | 1995 |
Web of Science® Times Cited: | 207 |
Deposited By: | Research Division |
Deposited On: | 2015-11-11 |
Last Modified: | 2015-12-22 |
Downloads: | 0 |
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