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New magnet‐sensitive structures in bacterial and archaeal cells
Author(s) -
Vainshtein M.,
Suzi.,
Kudryashova E.,
Ariskina E.
Publication year - 2002
Publication title -
biology of the cell
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.543
H-Index - 85
eISSN - 1768-322X
pISSN - 0248-4900
DOI - 10.1016/s0248-4900(02)01179-6
Subject(s) - bacteria , biology , archaea , magnet , chromium , electron microscope , cobalt , intracellular , matrix (chemical analysis) , materials science , biochemistry , genetics , metallurgy , physics , quantum mechanics , optics , composite material
The objects of the investigation were: distribution of intracellular magnet‐sensitive structures among different taxonomic groups of prokaryotes, localisation and organisation of the magnet‐sensitive inclusions (MsI) in cells. The MsI were discovered in representatives of both prokaryotic domains (Bacteria and Archaea), 2 kingdoms and 7 orders of bacteria. They were some amorphous or non‐crystalline globules with the electron‐transparent centre surrounded with an electron‐dense homogenous matrix. The magnetic nature of the structures was shown by attraction with an applied magnet both for the cell suspensions and for the MsI isolated and separated from the destroyed cells. The MsI were studied with transparent electron microscopy and with X‐ray analyses. When the cells were grown in the iron‐containing nutrient medium, the matrix was enriched with iron. It was shown also that some bacteria grown with cobalt or with chromium contained the cobalt‐ or chromium‐enriched magnetic inclusions.