Horizontal transfer of a non-autonomous Helitron among insect and viral genomes

BMC Genomics
Brad S Coates

Abstract

The movement of mobile elements among species by horizontal transposon transfer (HTT) influences the evolution of genomes through the modification of structure and function. Helitrons are a relatively new lineage of DNA-based (class II) transposable elements (TEs) that propagate by rolling-circle replication, and are capable of acquiring host DNA. The rapid spread of Helitrons among animal lineages by HTT is facilitated by shuttling in viral particles or by unknown mechanisms mediated by close organism associations (e.g. between hosts and parasites). A non-autonomous Helitron independently annotated as BmHel-2 from Bombyx mori and the MITE01 element from Ostrinia nubilalis was predicted in the genomes of 24 species in the insect Order Lepidoptera. Integrated Helitrons retained ≥ 65% sequence identity over a 250 bp consensus, and were predicted to retain secondary structures inclusive of a 3'-hairpin and a 5'-subterminal inverted repeat. Highly similar Hel-2 copies were predicted in the genomes of insects and associated viruses, which along with a previous documented case of real-time virus-insect cell line transposition suggests that this Helitron has likely propagated by HTT. These findings provide evidence that insect virus m...Continue Reading

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Citations

Mar 10, 2016·Insect Molecular Biology·H-H ZhangX-G Zhang
Aug 24, 2016·Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis·Fang ChenZhen-Ying Wang
Feb 16, 2017·PLoS Biology·Samuel VennerDominique Pontier
Nov 10, 2017·Genes·Jean-Michel DrezenElisabeth Anne Herniou
Feb 10, 2018·Mobile DNA·Gabriel Luz WallauÉlgion Lúcio Silva Loreto
Feb 24, 2019·Genome Biology and Evolution·Irina R Arkhipova, Irina A Yushenova
Oct 19, 2017·G3 : Genes - Genomes - Genetics·Pedro HeringerGustavo C S Kuhn
Jul 14, 2018·Mobile DNA·Alexandre Freitas da SilvaGabriel Luz Wallau

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Datasets Mentioned

BETA
ET217030.1
AB597304.1
EF396411.1
AP009003.1
AP009031.1

Methods Mentioned

BETA
gene knockouts

Software Mentioned

Helitron
MEGA
Hel
ClustalW

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