title: Characterization of clones of HIV-1 infected HuT 78 cells defective in gag gene processing and of SIV clones producing large amounts of envelope glycoprotein.
abstract: Single-cell clones of HIV-1 (FRE-3) or SIV/Mne infected HuT 78 cells were obtained by plating dilutions of virally infected HuT 78 cells on a monolayer of sheep choroid plexus cells in 96-well microtiter plates. Several of these clones produce HIV-1 virus mutants that accumulate the gag precursor polyprotein and lack a functional protease. These protease-deficient viruses are non-infectious and consist of aberrant "immature" virus particles as determined by electron microscopy. Several SIV mutants are also described that produce large amounts of either the envelope glycoprotein gp120 or the nucleic acid binding gag protein. These mutants are useful for the purification of these retroviral proteins, in developing assays of protease inhibitors, and in preparing SIV envelope protein vaccines.
authors.affiliation: Laboratory of Viral Carcinogenesis, National Cancer Institute, Frederick, MD.
authors.forename: R E
authors.initials: RE
authors.lastname: Benveniste
authors.forename: R W
authors.initials: RW
authors.lastname: Hill
authors.forename: L J
authors.initials: LJ
authors.lastname: Eron
authors.forename: U M
authors.initials: UM
authors.lastname: Csaikl
authors.forename: W B
authors.initials: WB
authors.lastname: Knott
authors.forename: L E
authors.initials: LE
authors.lastname: Henderson
authors.forename: R C
authors.initials: RC
authors.lastname: Sowder
authors.forename: K
authors.initials: K
authors.lastname: Nagashima
authors.forename: M A
authors.initials: MA
authors.lastname: Gonda
mesh_terms: D000818:Animals; D015153:Blotting, Western; D002460:Cell Line; D003001:Cloning, Molecular; D004591:Electrophoresis, Polyacrylamide Gel; D015967:Gene Expression Regulation, Viral; D015683:Gene Products, gag / Q000235:genetics / Q000378:metabolism*; D015750:Genes, gag; D015699:HIV Envelope Protein gp120 / Q000235:genetics / Q000378:metabolism; D015497:HIV-1 / Q000235:genetics* / Q000302:isolation & purification / Q000502:physiology; D006801:Humans; D008854:Microscopy, Electron; D009154:Mutation; D011498:Protein Precursors / Q000235:genetics / Q000378:metabolism*; D012756:Sheep; D015302:Simian Immunodeficiency Virus / Q000235:genetics* / Q000502:physiology; D014779:Virus Replication
chemical_list: D015683:Gene Products, gag; D015699:HIV Envelope Protein gp120; D011498:Protein Precursors; C059767:p55 gag precursor protein, Human immunodeficiency virus 1