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McaA and McaB control the dynamic positioning of a bacterial magnetic organelle
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McaA and McaB control the dynamic positioning of a bacterial magnetic organelle
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Journal Article
McaA and McaB control the dynamic positioning of a bacterial magnetic organelle
2022
Overview
Magnetotactic bacteria are a diverse group of microorganisms that use intracellular chains of ferrimagnetic nanocrystals, produced within magnetosome organelles, to align and navigate along the geomagnetic field. Several conserved genes for magnetosome formation have been described, but the mechanisms leading to distinct species-specific magnetosome chain configurations remain unclear. Here, we show that the fragmented nature of magnetosome chains in
Magnetospirillum magneticum
AMB-1 is controlled by genes
mcaA
and
mcaB
. McaA recognizes the positive curvature of the inner cell membrane, while McaB localizes to magnetosomes. Along with the MamK actin-like cytoskeleton, McaA and McaB create space for addition of new magnetosomes in between pre-existing magnetosomes. Phylogenetic analyses suggest that McaA and McaB homologs are widespread among magnetotactic bacteria and may represent an ancient strategy for magnetosome positioning.
Magnetotactic bacteria use intracellular chains of ferrimagnetic nanocrystals, produced within magnetosome organelles, to align and navigate along the geomagnetic field. Here, Wan et al. identify two proteins involved in magnetosome positioning in
Magnetospirillum magneticum
, homologs of which are widespread among magnetotactic bacteria.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 14/34
/ 14/35
/ 14/63
/ 45
/ 45/111
/ 45/44
/ 82/111
/ Actin
/ Bacteria
/ Bacterial Proteins - genetics
/ Bacterial Proteins - metabolism
/ Chains
/ Crystals
/ Genes
/ Homology
/ Humanities and Social Sciences
/ Magnetospirillum - metabolism
/ Science
