title: HIV-1 and MLV Gag proteins are sufficient to recruit APOBEC3G into virus-like particles.
abstract: The cytidine deaminase hAPOBEC3G is an antiviral human factor that counteracts the replication of HIV-1 in absence of the Vif protein. hAPOBEC3G is packaged into virus particles and lethally hypermutates HIV-1. In this work, we examine the mechanisms governing hAPOBEC3G packaging. By GST pull-down and co-immunoprecipitation assays, we show that hAPOBEC3G binds to HIV-1 Pr55 Gag and its NC domain and to the RT and IN domains contained in Pr160 Gag-Pol. We demonstrate that the expression of HIV-1 Gag is sufficient to induce the packaging of hAPOBEC3G into Gag particles. Gag-Pol polypeptides containing RT and IN domains, as well as HIV-1 genomic RNA, seem not to be necessary for hAPOBEC3G packaging. Lastly, we show that hAPOBEC3G and its murine ortholog are packaged into HIV-1 and MLV Gag particles. We conclude that the Gag polypeptides from distant retroviruses have conserved domains allowing the packaging of the host antiviral factor APOBEC3G.
authors.affiliation: Inserm Unité 372, Université de la Méditerranée, 163 Avenue de Luminy, BP178, 13276 Marseille Cedex 09, France.
authors.forename: Marc
authors.initials: M
authors.lastname: Douaisi
authors.forename: Sylvie
authors.initials: S
authors.lastname: Dussart
authors.forename: Marianne
authors.initials: M
authors.lastname: Courcoul
authors.forename: Gilles
authors.initials: G
authors.lastname: Bessou
authors.forename: Robert
authors.initials: R
authors.lastname: Vigne
authors.forename: Etienne
authors.initials: E
authors.lastname: Decroly
mesh_terms: D000071480:APOBEC-3G Deaminase; D000818:Animals; D003564:Cytidine Deaminase; D015683:Gene Products, gag / Q000235:genetics / Q000378:metabolism*; D015497:HIV-1 / Q000235:genetics / Q000502:physiology; D006367:HeLa Cells; D006801:Humans; D009052:Leukemia Virus, Murine / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D009700:Nucleoside Deaminases; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D011498:Protein Precursors / Q000235:genetics / Q000378:metabolism*; D017434:Protein Structure, Tertiary; D011506:Proteins / Q000235:genetics / Q000378:metabolism*; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D012097:Repressor Proteins; D014771:Virion / Q000737:chemistry / Q000378:metabolism*; D014779:Virus Replication; D054301:gag Gene Products, Human Immunodeficiency Virus; D054302:pol Gene Products, Human Immunodeficiency Virus
chemical_list: D015683:Gene Products, gag; D020033:Protein Isoforms; D011498:Protein Precursors; D011506:Proteins; D011993:Recombinant Fusion Proteins; D012097:Repressor Proteins; D054301:gag Gene Products, Human Immunodeficiency Virus; C059767:p55 gag precursor protein, Human immunodeficiency virus 1; D054302:pol Gene Products, Human Immunodeficiency Virus; C091950:pr160 gag-pol precursor protein, Human immunodeficiency virus 1; D009700:Nucleoside Deaminases; D000071480:APOBEC-3G Deaminase; C464924:APOBEC3G protein, human; D003564:Cytidine Deaminase