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The role of the Drosophila LAMMER protein kinase DOA in somatic sex determination

机译:果蝇LAMMER蛋白激酶DOA在性别判定中的作用。

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摘要

DOA kinase, the Drosophila member of the LAMMER/Clk protein kinase family, phosphorylates SR and SR-like proteins, including TRA, TRA2 and RBP1, which are responsible for the alternative splicing of transcripts encoding the key regulator of sex-specific expression in somatic cells of the fly, DOUBLESEX. Specific Doa alleles induce somatic female-to-male sex transformations, which can be enhanced when combined with mutations in loci encoding SR and SR-like proteins. The Doa locus encodes six different kinases, of which a 69-kDa isoform is expressed solely in females. Expression of this isoform is itself under the regulation of the somatic sex determination regulatory network, thus forming a putative positive autoregulatory loop which would reinforce the choice of the female cell-fate. We speculate that this loop is part of the evolutionary ancestral sex-determination machinery, based upon evidence demonstrating the existence of an autoregulatory loop involving TRA and TRA2 in several other insect species.
机译:DOA激酶是LAMMER / Clk蛋白激酶家族的果蝇成员,磷酸化SR和SR-like蛋白,包括TRA,TRA2和RBP1,它们负责编码编码体细胞性别特异性表达的关键调控因子的转录物的剪接飞行中的细胞,DOUBLESEX。特定的Doa等位基因诱导了雌性至雌性的体细胞性别转化,当与编码SR和SR样蛋白的基因座中的突变结合时,这种转化可以增强。 Doa基因座编码6种不同的激酶,其中69-kDa同种型仅在雌性中表达。这种同工型的表达本身受躯体性别决定调节网络的调节,因此形成了一个假定的积极的自调节循环,这将增强女性细胞命运的选择。我们根据证明在其他几种昆虫中存在涉及TRA和TRA2的自调节环的证据,推测该环是进化祖先性别​​决定机制的一部分。

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