Synchrotron-Based Nano-XANES Reveals Intracellular Heterogeneity of Iron Species in Magnetotactic Bacteria
2021
This report demonstrates how scanning X-ray fluorescence microscopy
(SXFM) and nanoscale X-ray absorption near-edge structure (nano-XANES) can
spatially and chemically identify intracellular iron species at the single-cell
level, creating an opportunity to examine the role of iron storage in magnetite
biomineralization. Fe K-edge nano-XANES measurements of Magnetospirillum
gryphiswaldense in varied iron media conditions and iron storage capacity revealed
intracellular iron heterogeneities through a distinction between formed
magnetosomes and intracellular iron material. This work highlights the
potential of nano-XANES in providing an experimental advantage in the
multidisciplinary field of biomineralization.
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