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- W3106572248 abstract "Cyclic nucleotide signaling is pivotal to the asexual reproduction of Toxoplasma gondii, however little do we know about the phosphodiesterase enzymes in this widespread obligate intracellular parasite. Here, we identified 18 phosphodiesterases (TgPDE1-18) in the parasite genome, most of which form apicomplexan-specific clades and lack archetypal regulatory motifs often found in mammalian PDEs. Genomic epitope-tagging in the tachyzoite stage showed the expression of 11 phosphodiesterases with diverse subcellular distributions. Notably, TgPDE8 and TgPDE9 are located in the apical plasma membrane to regulate cAMP and cGMP signaling, as suggested by their dual-substrate catalysis and structure modeling. TgPDE9 expression can be ablated with no apparent loss of growth fitness in tachyzoites. Likewise, the redundancy in protein expression, subcellular localization and predicted substrate specificity of several other PDEs indicate significant plasticity and spatial control of cyclic nucleotide signaling during the lytic cycle. Our findings shall enable a rational dissection of signaling in tachyzoites by combinatorial mutagenesis. Moreover, the phylogenetic divergence of selected Toxoplasma PDEs from human counterparts can be exploited to develop parasite-specific inhibitors and therapeutics." @default.
- W3106572248 created "2020-12-07" @default.
- W3106572248 creator A5000426837 @default.
- W3106572248 creator A5021893061 @default.
- W3106572248 creator A5080027307 @default.
- W3106572248 creator A5080425027 @default.
- W3106572248 date "2020-01-01" @default.
- W3106572248 modified "2023-10-14" @default.
- W3106572248 title "The protozoan parasite Toxoplasma gondii encodes a gamut of phosphodiesterases during its lytic cycle in human cells" @default.
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- W3106572248 doi "https://doi.org/10.1016/j.csbj.2020.11.024" @default.
- W3106572248 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7720076" @default.
- W3106572248 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33335684" @default.
- W3106572248 hasPublicationYear "2020" @default.
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