title: TIP47 is required for the production of infectious HIV-1 particles from primary macrophages.
abstract: Macrophages are among the major targets of HIV-1 infection and play a key role in viral pathogenesis. Identification of the cellular cofactors involved in the production of infectious HIV-1 from macrophages is thus crucial. Here, we investigated the role of the cellular cofactor TIP47 in HIV-1 morphogenesis in primary macrophages. Using siRNA approach, we show that TIP47 is essential for HIV-1 infectivity and propagation. TIP47 silencing disrupts Gag and Env colocalization in macrophages. Moreover, mutations in HIV-1 Gag or Env, which abolish interaction with TIP47, impair HIV-1 propagation and infectivity preventing colocalization of Gag and Env, Gag and Env coimmunoprecipitation. Interestingly, disruption of Gag-TIP47 interaction by matrix mutation or TIP47 depletion also causes Gag to localize in scattered dots in the vicinity of the plasma membrane of macrophages. Therefore, TIP47 is required for the encounter between Gag and Env, and thus for the generation of infectious HIV-1 particles from primary macrophages.
authors.affiliation: Institut Cochin, Université Paris Descartes, CNRS (UMR 8104), Paris, France.
authors.forename: Hélène
authors.initials: H
authors.lastname: Bauby
authors.forename: Sandra
authors.initials: S
authors.lastname: Lopez-Vergès
authors.forename: Guillaume
authors.initials: G
authors.lastname: Hoeffel
authors.forename: Delphine
authors.initials: D
authors.lastname: Delcroix-Genête
authors.forename: Katy
authors.initials: K
authors.lastname: Janvier
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Mammano
authors.forename: Anne
authors.initials: A
authors.lastname: Hosmalin
authors.forename: Clarisse
authors.initials: C
authors.lastname: Berlioz-Torrent
mesh_terms: D004268:DNA-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D015497:HIV-1 / Q000378:metabolism / Q000502:physiology*; D006367:HeLa Cells; D006801:Humans; D047468:Immunoprecipitation; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics / Q000378:metabolism*; D008264:Macrophages / Q000378:metabolism / Q000821:virology*; D009154:Mutation; D000070796:Perilipin-3; D011257:Pregnancy Proteins / Q000235:genetics / Q000378:metabolism*; D034741:RNA, Small Interfering / Q000235:genetics; D033921:Vesicular Transport Proteins; D019065:Virus Assembly; D054299:env Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000378:metabolism; D054301:gag Gene Products, Human Immunodeficiency Virus / Q000235:genetics / Q000378:metabolism
chemical_list: D004268:DNA-Binding Proteins; D047908:Intracellular Signaling Peptides and Proteins; C038196:PLIN3 protein, human; D000070796:Perilipin-3; D011257:Pregnancy Proteins; D034741:RNA, Small Interfering; D033921:Vesicular Transport Proteins; D054299:env Gene Products, Human Immunodeficiency Virus; D054301:gag Gene Products, Human Immunodeficiency Virus