Greigite magnetosome membrane ultrastructure in ‘Candidatus Magnetoglobus multicellularis’


Abstract:

The ultrastructure of the greigite magnetosome membrane in the multicellular magnetotactic bacteria ‘Candidatus Magnetoglobus multicellularis’ was studied. Each cell contains 80 membrane-enclosed iron-sulfide magnetosomes. Cytochemistry methods showed that the magnetosomes are enveloped by a structure whose staining pattern and dimensions are similar to those of the cytoplasmic membrane, indicating that the magnetosome membrane likely originates from the cytoplasmic membrane. Freeze-fracture showed intramembrane particles in the vesicles surrounding each magnetosome. Observations of cell membrane invaginations, the trilaminar membrane structure of immature magnetosomes, and empty vesicles together suggested that greigite magnetosome formation begins by invagination of the cell membrane, as has been proposed for magnetite magnetosomes.[Int Microbiol 2008; 11 (2): 75-80]

Año de publicación:

2008

Keywords:

    Fuente:

    googlegoogle

    Tipo de documento:

    Other

    Estado:

    Acceso abierto

    Áreas de conocimiento:

    • Microbiología
    • Nanopartícula
    • Ciencia de materiales

    Áreas temáticas:

    • Microorganismos, hongos y algas