Endosymbiosis in amoebae: Recently established endosymbionts have become required cytoplasmic components

@article{Jeon1976EndosymbiosisIA,
  title={Endosymbiosis in amoebae: Recently established endosymbionts have become required cytoplasmic components},
  author={Kwang W. Jeon and Min su Jeon},
  journal={Journal of Cellular Physiology},
  year={1976},
  volume={89}
}
  • K. JeonM. Jeon
  • Published 1 October 1976
  • Biology
  • Journal of Cellular Physiology
A strain of large, free‐living amoeba that became dependent on bacterial endosymbionts which had infected the amoebae initially as intracellular parasites, was studied by micrurgy and electron microscopy. The results show that the infected host cells require the presence of live endosymbionts for their survival. Thus, the nucleus of an infected amoeba can form a viable cell with the cytoplasm of a noninfected amoeba only when live endosymbionts are present. The endosymbiotic bacteria are not… 

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  • 1995

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. The role of bacterial endosymbionts in the acquisition of new phenotypic characters was studied by transplanting nuclei from an uninfected strain of Amoeba proteus into the enucleated cytoplasm of

Bacterial‐Endosymbiote‐Derived Lipopolysaccharides on Amoeba Symbiosome Membranes

This is the first report for the presence of symbiote-derived lipopolysaccharides on the host symbiosome membranes, and their possible roles are discussed in relation to the prevention of lysosomal fusion with symbiosomes.

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While some free-living amebas and other types of cells have been known to carry infective or symbiotic bacteria, the roles of such bacteria have not been studied in detail.

Effect of chloramphenicol on bacterial endosymbiotes in a strain of Amoeba proteus.

The results supported previous studies that amebae were dependent on endosymbiotes, and treatment with chloramphenicol caused such ultrastructural changes as expansion of the nuclear zone and deformation of symbiotes.

Genetic and Physiological Interactions in the Amoeba-Bacteria Symbiosis1

The expression of the normal amoeba sams gene (sams1) encoding one form of S-adenosylmethionine synthetase is switched to that of sams2 by endosymbiotic X-bacteria, and its significance is discussed.

Infection and Maintenance of Holospora Species in Paramecium caudatum

Infectious forms of Holospora species have a cytoplasmic region and a periplasmic lumen with an electron-translucent invasion tip, providing an excellent opportunity for elucidating host-symbiont interactions between eukaryotic and prokaryotic cells and establishment of new associations leading to eukARYotic cell evolution.

The Large, Free‐living Amoebae: Wonderful Cells for Biological Studies

  • K. Jeon
  • Biology
    The Journal of eukaryotic microbiology
  • 1995
It is shown that amoebae are uniquely suited as model cells with which to study these phenomena, including cell motility, nucleocytoplasmic interactions, membrane function, and symbiosis.
...

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  • K. Jeon
  • Biology, Medicine
    Science
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