The implications of DNA transposons in the evolution of P elements in zebrafish (Danio rerio)
- 作者：Sylvia Hagemann and Sabine E. Hammer
- 关键词：Drosophila P transposon ; DNA transposon ; Evolution ; Domestication hypothesis ; Source gene hypothesis ; Danio rerio
- 刊名：Genomics
- 出版年：2006
- 期刊代码：170_08887543
- 类别：bio
- 出版时间：November 2006
- 卷：88
- 期：5
- 页码：572-579
- 文件大小：380 K
摘要
We have carried out detailed analyses of Drosophila P-transposon-homologous Pdre elements in zebrafish (Danio rerio) and present a model to explain the evolutionary origin of the complete and terminally truncated copies. Analysis of the most complex terminally truncated element led to the identification of novel DNA transposons, referred to as demio, hexi, and lady elements. We also show that the existence of a P-homologous stable gene can be explained in two ways: it is a P-transposon source gene, and insertion into or recombination with another transposon can lead to mobilization by recruitment of structures necessary for transposition (known as the source gene hypothesis), or it is the result of a domestication event involving a P transposon (domestication hypothesis). Our results indicate that both scenarios are possible and that they reflect different stages of the P-element life cycle.