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TgAP2IX-5 is a key transcriptional regulator of the asexual cell cycle division in Toxoplasma gondii

Abstract : Apicomplexan parasites have evolved efficient and distinctive strategies for intracellular replication where the timing of emergence of the daughter cells (budding) is a decisive element. However, the molecular mechanisms that provide the proper timing of parasite budding remain unknown. Using Toxoplasma gondii as a model Apicomplexan, we identified a master regulator that controls the timing of the budding process. We show that an ApiAP2 transcription factor, TgAP2IX-5, controls cell cycle events downstream of centrosome duplication. TgAP2IX-5 binds to the promoter of hundreds of genes and controls the activation of the budding-specific cell cycle expression program. TgAP2IX-5 regulates the expression of specific transcription factors that are necessary for the completion of the budding cycle. Moreover, TgAP2IX-5 acts as a limiting factor that ensures that asexual proliferation continues by promoting the inhibition of the differentiation pathway. Therefore, TgAP2IX-5 is a master regulator that controls both cell cycle and developmental pathways.
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https://hal.archives-ouvertes.fr/hal-03107529
Contributor : Mathieu Gissot <>
Submitted on : Tuesday, January 12, 2021 - 4:17:36 PM
Last modification on : Wednesday, January 13, 2021 - 2:50:13 PM

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Asma Khelifa, Cecilia Guillen Sanchez, Kevin Lesage, Ludovic Huot, Thomas Mouveaux, et al.. TgAP2IX-5 is a key transcriptional regulator of the asexual cell cycle division in Toxoplasma gondii. Nature Communications, Nature Publishing Group, 2021, 12, pp.116. ⟨10.1038/s41467-020-20216-x⟩. ⟨hal-03107529⟩

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