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A Horizontally Transferred Autonomous Helitron Became a Full Polydnavirus Segment in Cotesia vestalis.
Heringer, Pedro; Dias, Guilherme B; Kuhn, Gustavo C S.
Afiliação
  • Heringer P; Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
  • Dias GB; Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil.
  • Kuhn GCS; Departamento de Biologia Geral, Universidade Federal de Minas Gerais, Belo Horizonte, 31270-901, Brazil gcskuhn@ufmg.br.
G3 (Bethesda) ; 7(12): 3925-3935, 2017 12 04.
Article em En | MEDLINE | ID: mdl-29042411
Bracoviruses associate symbiotically with thousands of parasitoid wasp species in the family Braconidae, working as virulence gene vectors, and allowing the development of wasp larvae within hosts. These viruses are composed of multiple DNA circles that are packaged into infective particles, and injected together with wasp's eggs during parasitization. One of the viral segments of Cotesia vestalis bracovirus contains a gene that has been previously described as a helicase of unknown origin. Here, we demonstrate that this gene is a Rep/Helicase from an intact Helitron transposable element that covers the viral segment almost entirely. We also provide evidence that this element underwent at least two horizontal transfers, which appear to have occurred consecutively: first from a Drosophila host ancestor to the genome of the parasitoid wasp C. vestalis and its bracovirus, and then from C. vestalis to a lepidopteran host (Bombyx mori). Our results reinforce the idea of parasitoid wasps as frequent agents of horizontal transfers in eukaryotes. Additionally, this Helitron-bracovirus segment is the first example of a transposable element that effectively became a whole viral circle.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polydnaviridae / Transferência Genética Horizontal / Himenópteros / Insetos Vetores Limite: Animals Idioma: En Revista: G3 (Bethesda) Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Polydnaviridae / Transferência Genética Horizontal / Himenópteros / Insetos Vetores Limite: Animals Idioma: En Revista: G3 (Bethesda) Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido