Recurrent Domestication by Lepidoptera of Genes from Their Parasites Mediated by Bracoviruses

被引:58
作者
Gasmi, Laila [1 ,2 ]
Boulain, Helene [3 ]
Gauthier, Jeremy [3 ]
Hua-Van, Aurelie [4 ]
Musset, Karine [3 ]
Jakubowska, Agata K. [1 ,2 ]
Aury, Jean-Marc [5 ]
Volkoff, Anne-Nathalie [6 ]
Huguet, Elisabeth [3 ]
Herrero, Salvador [1 ,2 ]
Drezen, Jean-Michel [3 ]
机构
[1] Univ Valencia, Dept Genet, E-46100 Burjassot, Spain
[2] Univ Valencia, Estruct Recerca Interdisciplinar Biotecnol & Biom, E-46100 Burjassot, Spain
[3] Univ Tours, UFR Sci & Tech, UMR CNRS 7261, Inst Rech Biol Insecte, Tours, France
[4] Univ Paris Saclay, Univ Paris 11, CNRS, Lab Evolut,Genomes,Comportement,Ecol,UMR9191,IRD, Gif Sur Yvette, France
[5] Commissariat Energie Atom & Energies Alternat, Genoscope Ctr Natl Sequencage, Evry, France
[6] Univ Montpellier, UMR 1333, INRA, Divers Genomes & Interact Microorganisms & Insect, F-34059 Montpellier, France
来源
PLOS GENETICS | 2015年 / 11卷 / 09期
关键词
WASP COTESIA-CONGREGATA; C-TYPE LECTIN; SPODOPTERA-EXIGUA; HORIZONTAL TRANSFER; BUTTERFLIES LEPIDOPTERA; HOST; GENOME; DISEASE; DNA; REPLICATION;
D O I
10.1371/journal.pgen.1005470
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Bracoviruses are symbiotic viruses associated with tens of thousands of species of parasitic wasps that develop within the body of lepidopteran hosts and that collectively parasitize caterpillars of virtually every lepidopteran species. Viral particles are produced in the wasp ovaries and injected into host larvae with the wasp eggs. Once in the host body, the viral DNA circles enclosed in the particles integrate into lepidopteran host cell DNA. Here we show that bracovirus DNA sequences have been inserted repeatedly into lepidopteran genomes, indicating this viral DNA can also enter germline cells. The original mode of Horizontal Gene Transfer (HGT) unveiled here is based on the integrative properties of an endogenous virus that has evolved as a gene transfer agent within parasitic wasp genomes for approximate to 100 million years. Among the bracovirus genes thus transferred, a phylogenetic analysis indicated that those encoding C-type-lectins most likely originated from the wasp gene set, showing that a bracovirus-mediated gene flux exists between the 2 insect orders Hymenoptera and Lepidoptera. Furthermore, the acquisition of bracovirus sequences that can be expressed by Lepidoptera has resulted in the domestication of several genes that could result in adaptive advantages for the host. Indeed, functional analyses suggest that two of the acquired genes could have a protective role against a common pathogen in the field, baculovirus. From these results, we hypothesize that bracovirus-mediated HGT has played an important role in the evolutionary arms race between Lepidoptera and their pathogens.
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页数:32
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