Complexome profile of mitochondrial complexes in the myzozoan parasite of oysters, Perkinsus marinus
Maclean, A. E.; Iorillo, O.; Faktorova, D.; Singh, M.; McGill, S.; Lukes, J.; Sheiner, L.
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Mitochondrial complexes, such as the mitochondrial electron transport chain (mETC), the F1Fo-ATP synthase and the mitochondrial ribosome, are centrally important for mitochondrial function. Recently, an unexpected diversity in the composition of these complexes across unicellular eukaryotic lineages, with the apicomplexan parasites featuring prominently, has been revealed. However, whether the observed enlarged and divergent mitochondrial complexes are conserved across the wider Myzozoan lineage has not been investigated. Here, using a complexome profiling proteomic approach, we have characterised the composition of the mitochondrial complexes of the myzozoan parasite of oysters, Perkinsus marinus. We show that it shares with Plasmodium and Toxoplasma huge ATP synthase and mETC complexes. Moreover, the Perkinsus mitoribosome possesses many of the divergent features recently discovered in apicomplexans, such as an expanded subunit repertoire and the inclusion of RAP-domain and ApiAP2-like proteins as ribosomal proteins. Our study reveals the divergent subunit composition of mitochondrial complexes is an ancestral and highly conserved feature of Myzozoa.
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