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Identification and functional characterization of methyl-CpG binding domain protein from Tribolium castaneum

机译:呋喃氨酰甲基-CpG结合域蛋白的鉴定与功能表征

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Methyl-CpG binding domain proteins (MBD) can specifically bind to methylated CpG sites and play important roles in epigenetic gene regulation. Here, we identified and functionally characterized the MBD protein in Tribolium castaneum. T. castaneum genome encodes only one MBD protein: TcMBD2/3. RNA interference targeting this gene at different developmental stages caused lethal phenotypes including metamorphosis deficiency in larvae and pupae, gastrointestinal system problems and fecundity deficiency in adult. Moreover, Tcmbd2/3 knockdown adult showed progressive reduced locomoter activity, a typical neurodegeneration phenotype. This is a common feature of DNA methylation in mammals and has not been found in other insects. However, band shift assays demonstrated that TcMBD2/3 could not bind to methylated DNA, indicating the essential roles of TcMBD2/3 is independent of DNA methylation. Our study provides Tcmbd2/3 plays important roles in T. castaneum and gives new insights into the potential mechanism of action of MBD proteins in insect.
机译:甲基-CPG结合结构域蛋白(MBD)可以特异性结合甲基化的CPG位点,并在表观遗传基因调节中起重要作用。在这里,我们在呋喃西葡萄中鉴定和功能表征了MBD蛋白。 T.castaneum基因组只编码一个MBD蛋白质:TCMBD2 / 3。在不同发育阶段靶向该基因的RNA干扰导致致命表型,包括幼虫和蛹的变态缺乏,胃肠系统问题和成人的繁殖力缺乏。此外,TCMBD2 / 3敲低成人显示出逐步减少的运动器活性,典型的神经变性表型。这是哺乳动物中DNA甲基化的常见特征,并且在其他昆虫中尚未发现。然而,带换档测定证明TCMBD2 / 3不能与甲基化DNA结合,表明TCMBD2 / 3的基本作用与DNA甲基化无关。我们的研究提供了TCMBD2 / 3在T. Castaneum中起重要作用,并对MBD蛋白在昆虫中的潜在机制中发挥了新的见解。

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