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Journal Article
Review
3'-end mRNA processing within apicomplexan parasites, a patchwork of classic, and unexpected players.
Wiley Interdisciplinary Reviews. RNA 2023 March 31
The 3'-end processing of mRNA is a co-transcriptional process that leads to the formation of a poly-adenosine tail on the mRNA and directly controls termination of the RNA polymerase II juggernaut. This process involves a megadalton complex composed of cleavage and polyadenylation specificity factors (CPSFs) that are able to recognize cis-sequence elements on nascent mRNA to then carry out cleavage and polyadenylation reactions. Recent structural and biochemical studies have defined the roles played by different subunits of the complex and provided a comprehensive mechanistic understanding of this machinery in yeast or metazoans. More recently, the discovery of small molecule inhibitors of CPSF function in Apicomplexa has stimulated interest in studying the specificities of this ancient eukaryotic machinery in these organisms. Although its function is conserved in Apicomplexa, the CPSF complex integrates a novel reader of the N6-methyladenosine (m6A). This feature, inherited from the plant kingdom, bridges m6A metabolism directly to 3'-end processing and by extension, to transcription termination. In this review, we will examine convergence and divergence of CPSF within the apicomplexan parasites and explore the potential of small molecule inhibition of this machinery within these organisms. This article is categorized under: RNA Processing > 3' End Processing RNA Processing > RNA Editing and Modification.
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