Horizontal transfer of a novel Helentron in insects

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• 作者：Hua-Hao Zhang ; Guo-Yin Li ; Xiao-Min Xiong ; Min-Jin Han…
• 关键词：Horizontal transfer ; Helentrons ; Insects
• 刊名：Molecular Genetics and Genomics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：292
• 期：1
• 页码：243-250
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Cell Biology; Biochemistry, general; Microbial Genetics and Genomics; Plant Genetics & Genomics; Animal Genetics and Genomics;
• 出版者：Springer Berlin Heidelberg
• ISSN：1617-4623
• 卷排序：292

文摘

Helentrons represent a novel subtype of Helitrons. However, the evolutionary history of Helentrons in organisms is not clearly understood. In this study, we performed structure and autonomous partner analyses, which revealed that bm_455, a TE obtained from the Bombyx mori TE database, BmTEdb, was a member of Helentrons but not a long-terminal repeat (LTR) retrotransposon. Further analyses showed that bm_455 was also present in a wide range of insects including lepidopterans, coleopterans and hymenopterans using a homology-based search strategy. Several lines of evidence (high sequence identity, discontinuous distribution and lack of intense purifying selection) suggested that these elements could have been transferred into these species in part by horizontal transfers (HTs). Because Helentrons can capture host gene fragments, HTs of Helentrons might have a huge impact on their host genome evolution.