Minimal cell JCVI-syn3B as a chassis to reveal the mechanisms behind Mycoplasma host-pathogen interactions
Bittencourt, D. M. d. C.; Brown, D. M.; Assad-Garcia, N.; Lynott, M. R.; Sun, L.; Melo, L. A. M. P. d.; Freire, M.; Glass, J. I.
Show abstract
Mycoplasmas are atypical bacteria that are obligate parasites of animals and plants. They are known for their capacity to contaminate and parasitize mammalian cell cultures, thereby offering fortuitous models to examine the host-microbe interaction. We used a near wildtype strain of the goat pathogen Mycoplasma mycoides (Mmc) and several minimized Mmc strains lacking genes not essential for growth in laboratory media to investigate host-mycoplasma interactions. Stains with near minimal genomes were incapable of surviving in co-culture with mammalian HEK-293T and HeLa cells. We identified a cluster of eight non-essential genes that when added back to the minimized strains enabled mycoplasma attachment to mammalian cells. Those genes did not restore the capacity of the minimal cell to grow when co-cultured with mammalian cells indicating processes of attaching to mammalian cells and parasitism involve different genes. Furthermore, minimized Mmc strains were not phagocytized by human myeloid cells unlike the near wildtype Mmc.
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