您好，欢迎访问江苏省农业科学院 机构知识库！
江苏省农业科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Characterization of a novel Helitron family in insect genomes: insights into classification, evolution and horizontal transfer

文献类型： 外文期刊

作者： Han, Guangjie 1 ; Zhang, Nan 1 ; Xu, Jian 2 ; Jiang, Heng 1 ; Ji, Caihong 1 ; Zhang, Ze 3 ; Song, Qisheng 4 ; Stanley, Da 1 ;

作者机构： 1.Yangzhou Univ, Coll Hort & Plant Protect, Yangzhou 225009, Jiangsu, Peoples R China

2.Jiangsu Lixiahe Inst Agr Sci, Yangzhou 225007, Jiangsu, Peoples R China

3.Chongqing Univ, Sch Life Sci, Chongqing 400044, Peoples R China

4.Univ Missouri, Div Plant Sci, Columbia, MO USA

5.ARS, USDA, Biol Control Insects Res Lab, Columbia, MO USA

6.Jiangsu Acad Agr Sci, Inst Plant Protect, Nanjing 210014, Jiangsu, Peoples R China

关键词： Helitron; Transposable elements; Horizontal transfer; Insects; Genome evolution

期刊名称：MOBILE DNA （ 影响因子：4.06； 五年影响因子：5.82 ）

ISSN： 1759-8753

年卷期： 2019 年 10 卷

页码：

收录情况： SCI

摘要： Background: Helitrons play an important role in shaping eukaryotic genomes due to their ability to transfer horizontally between distantly related species and capture gene fragments during the transposition. However, the mechanisms of horizontal transfer (HT) and the process of gene fragment capturing of Helitrons still remain to be further clarified. Results: Here, we characterized a novel Helitron family discontinuously distributed in 27 out of 256 insect genomes. The most prominent characteristic of Hel1 family is its high sequence similarity among species of different insect orders. Related elements were also identified in two spiders, representing the first report of spider Helitrons. All these elements were classified into 2 families, 9 subfamilies and 35 exemplars based on our new classification criteria. Autonomous partners of Helitron were reconstructed in the genomes of three insects and one spider. Integration pattern analysis showed that majority of Hel1A elements in Papilio xuthus and Pieris rapae inserted into introns. Consistent with filler DNA model, stepwise sequence acquisition was observed in Sfru_Hel1Aa, Sfru_Hel1Ab and Sfru_Hel1Ac in Spodoptera frugiperda. Remarkably, the evidence that Prap_Hel1Aa in a Lepdidoptera insect, Pieris rapae, was derived from Cves_Hel1Aa in a parasitoid wasp, Cotesia vestalis, suggested the role of nonregular host-parasite interactions in HT of Helitrons. Conclusions: We proposed a modified classification criteria of Helitrons based on the important role of the 5'-end of Helitrons in transposition, and provided evidence for stepwise sequence acquisition and recurrent HT of a novel Helitron family. Our findings of the nonregular host-parasite interactions may be more conducive to the HT of transposons.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江苏省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台