magnetosome

Edge evidence

• magnetic iron-mineral crystal located in magnetosome biolink:located_in

  The magnetic mineral crystal sits inside the magnetosome membrane.

  • DOI:10.1038/nrmicro.2016.99 Uebe & Schüler review magnetosome biogenesis as the formation of membrane-bounded magnetic-mineral organelles.
• magnetosome enables magnetotaxis RO:0002327

  Chains of magnetosomes act as a cellular compass, aligning the organism with geomagnetic field lines.

  • DOI:10.1038/nrmicro842 Bazylinski & Frankel describe magnetosomes and the magnetotactic lifestyle they enable.
• MamK organizes magnetosome chain assembly

  The actin-like protein MamK organizes magnetosomes into chains.

  • DOI:10.1128/mbio.01649-23 MTB align their magnetosome organelles into chains, organized by the actin-like MamK; broadly conserved.
• MamK polymerizes into actin-like MamK filaments

  MamK polymerizes into long actin-like filaments that scaffold the magnetosome chain.

  • DOI:10.1128/mbio.01649-23 MamK polymerizes into long, actin-like filaments.
• magnetosome chain assembly enables magnetotaxis RO:0002327

  Chain assembly of magnetosomes underlies the cellular compass enabling magnetotaxis.

  • DOI:10.1128/mbio.01649-23 Magnetosomes aligned into chains by MamK form the magnetic compass for navigation.
• mamAB operon sufficient for magnetosome biomineralization

  The mamAB operon is sufficient for rudimentary magnetosome biomineralization.

  • DOI:10.1111/mmi.15330 The mamAB operon is sufficient for rudimentary biomineralization.
• magnetosome biomineralization produces magnetic iron-mineral crystal METPO:2000202

  Biomineralization forms the magnetic iron-mineral crystal within the magnetosome.

  • DOI:10.1111/mmi.15330 Magnetosome biomineralization yields the intracellular magnetic mineral crystal.
• MamB promotes magnetosome membrane invagination RO:0002213

  MamB promotes invagination of the cytoplasmic membrane to form the magnetosome vesicle.

  • DOI:10.1111/mmi.15330 MamB likely recruits MAPs and promotes membrane invagination.
• oxygen-poor, low-sulfide environment favors magnetite magnetosome

  Oxygen-poor, low-sulfide environments favor magnetite magnetosomes.

  • DOI:10.1111/mmi.15330 Magnetite is more common in oxygen-poor, low-sulfide environments.
• sulfide-rich habitat favors greigite magnetosome

  Sulfide-rich habitats favor greigite magnetosomes.

  • DOI:10.1111/mmi.15330 Greigite dominates in sulfide-rich habitats.