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Identification of a new Schistosoma mansoni SMYB1 partner: Putative roles in RNA metabolism

机译:鉴定曼氏血吸虫新SMYB1伴侣:RNA代谢中的假定作用

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SUMMARY SMYB1 is a Schistosoma mansoni protein highly similar to members of the Y-box binding protein family. Similar to other homologues, SMYB1 is able to bind double- and single-stranded DNA, as well as RNA molecules. The characterization of proteins involved in the regulation of gene expression in S. mansoni is of great importance for the understanding of molecular events that control morphological and physiological changes in this parasite. Here we demonstrate that SMYB1 is located in the cytoplasm of cells from different life-cycle stages of S. mansoni, suggesting that this protein is probably acting in mRNA metabolism in the cytoplasm and corroborating previous findings from our group that showed its ability to bind RNA. Protein-protein interactions are important events in all biological processes, since most proteins execute their functions through large supramolecular structures. Yeast two-hybrid screenings using SMYB1 as bait identified a partner in S. mansoni similar to the SmD3 protein of Drosophila melanogaster (SmRNP), which is important in the assembly of small nuclear ribonucleoprotein complexes. Also, pull-down assays were conducted using immobilized GST-SMYB1 proteins and confirmed the SMYB1-SmRNP interaction. The interaction of SMYB1 with a protein involved in mRNA processing suggests that it may act in processes such as turnover, transport and stabilization of RNA molecules.
机译:小结SMYB1是曼氏血吸虫蛋白,与Y-box结合蛋白家族的成员高度相似。与其他同源物相似,SMYB1能够结合双链和单链DNA以及RNA分子。曼氏链球菌基因表达调控蛋白的表征对于理解控制该寄生虫的形态和生理变化的分子事件非常重要。在这里,我们证明SMYB1位于曼氏葡萄球菌不同生命周期阶段的细胞质中,表明该蛋白可能在细胞质中的mRNA代谢中起作用,并证实了我们小组先前的研究结果,表明其结合RNA的能力。蛋白质-蛋白质相互作用是所有生物过程中的重要事件,因为大多数蛋白质通过大的超分子结构执行其功能。使用SMYB1作为诱饵的酵母双杂交筛选确定了曼氏链球菌中的一个伴侣,该伴侣类似于果蝇(SmRNP)的SmD3蛋白,这在小核糖核糖核蛋白复合物的组装中很重要。此外,使用固定化的GST-SMYB1蛋白进行了下拉测定,并确认了SMYB1-SmRNP相互作用。 SMYB1与参与mRNA加工的蛋白质的相互作用表明,它可能在RNA分子的周转,运输和稳定化等过程中起作用。

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