Multiple invasions of Gypsy and Micropia retroelements in genus Zaprionus and melanogaster subgroup of the genus Drosophila
Multiple invasions of Gypsy and Micropia retroelements in genus Zaprionus and melanogaster subgroup of the genus Drosophila
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DOI：
10.1186/1471-2148-9-279
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发表时间：
2009-12-02
影响因子：
3.4
通讯作者：
Carareto, Claudia M. A.
中科院分区：
文献类型：
--
作者：
de Setta, Nathalia;Van Sluys, Marie-Anne;Carareto, Claudia M. A.
背景：Zaprionus属与黑腹水母亚群有共同的进化特征，如起源的空间和时间。虽然关于Zaprionus属转座元素含量的信息很少，但它们的一些元素似乎与黑腹蛇亚群的转座元素关系更密切，这表明这两类物种在进化过程中参与了水平转移事件。结果：只在Zaprionus亚属的7种物种中发现了不同的Gypsy和Micropia逆转录元件，表明它们在所采集的物种中具有转录活性。每个逆转录元件的序列都与黑腹蛇物种亚组的序列密切相关，最简明的假设是15个水平转移事件影响了它们的进化。黑腹蛇亚群的吉普赛反转录元件可能入侵Zaprionus基因组约11MYA。相反，Micropia反转录元件可能是最近从未知的供体(类似于3MYA)引入Zaprionus亚属和Blackogaster亚群的。结论：Zaprionus和Blackogaster物种的吉普赛人和Micropia具有相似的进化模式。进化、生态和行为学特征的共享可能允许这些物种经历一段允许转座元素入侵的时期，这解释了提出的水平转移浪潮。
Background: The Zaprionus genus shares evolutionary features with the melanogaster subgroup, such as space and time of origin. Although little information about the transposable element content in the Zaprionus genus had been accumulated, some of their elements appear to be more closely related with those of the melanogaster subgroup, indicating that these two groups of species were involved in horizontal transfer events during their evolution. Among these elements, the Gypsy and the Micropia retroelements were chosen for screening in seven species of the two Zaprionus subgenera, Anaprionus and Zaprionus.Results: Screening allowed the identification of diverse Gypsy and Micropia retroelements only in species of the Zaprionus subgenus, showing that they are transcriptionally active in the sampled species. The sequences of each retroelement were closely related to those of the melanogaster species subgroup, and the most parsimonious hypothesis would be that 15 horizontal transfer events shaped their evolution. The Gypsy retroelement of the melanogaster subgroup probably invaded the Zaprionus genomes about 11 MYA. In contrast, the Micropia retroelement may have been introduced into the Zaprionus subgenus and the melanogaster subgroup from an unknown donor more recently (similar to 3 MYA).Conclusion: Gypsy and Micropia of Zaprionus and melanogaster species share similar evolutionary patterns. The sharing of evolutionary, ecological and ethological features probably allowed these species to pass through a permissive period of transposable element invasion, explaining the proposed waves of horizontal transfers.