title: [Construction and analysis of activity of an HIV-1/bovine immunodeficiency virus chimeric clone cDNA].
abstract: OBJECTIVE
  Chimeric human/bovine immunodeficiency virus (HBIV) cDNA was constructed by replacing HIV tat and LTR with bovine immunodeficiency virus (BIV) tat and LTR to study the activity of BIV tat and LTR in the chimerae.
  
  
  METHODS
  The target fragments of BIV tat, LTR and HIV gag, pol, env were respectively amplified by using PCR and sequentially inserted into pBluescript SK(+) vector. The chimeric clone was transfected into human MT4 cells. The transcript and gene expression of the HBIV chimeric virus were detected by using RT-PCR and a reverse transcriptase assay, respectively.
  
  
  RESULTS
  BIV tat mRNA and HIV gag mRNA were detected. The reverse transcriptase activity of the chimeric virus was analyzed in the fluctuation curve.
  
  
  CONCLUSIONS
  In chimeric HBIV cDNA transfected MT?4 cells, BIV tat and HIV gag were transcripted. The reverse transcriptase of the chimeric virus had biological activity. These data suggest that in MT4 cells, BIV LTR had promoter activity and BIV tat had the function of transactivation in the chimeric virus. The study of the chimeric virus with infectivity is in progress.
authors.affiliation: Department of Oncogenic Virus and HIV, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100052, China.
authors.forename: Yi-shu
authors.initials: YS
authors.lastname: Yang
authors.forename: Guo-min
authors.initials: GM
authors.lastname: Chen
authors.forename: Wen-ping
authors.initials: WP
authors.lastname: Dong
authors.forename: Qi-min
authors.initials: QM
authors.lastname: Chen
authors.forename: Yun-qi
authors.initials: YQ
authors.lastname: Geng
authors.forename: Yi
authors.initials: Y
authors.lastname: Zeng
mesh_terms: D016915:AIDS Vaccines; D000818:Animals; D002417:Cattle; D003001:Cloning, Molecular; D018076:DNA, Complementary / Q000235:genetics; D004279:DNA, Viral / Q000235:genetics*; D015750:Genes, gag / Q000235:genetics; D015751:Genes, pol / Q000235:genetics; D015756:Genes, tat / Q000235:genetics*; D015497:HIV-1 / Q000235:genetics*; D006801:Humans; D016087:Immunodeficiency Virus, Bovine / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000235:genetics* / Q000378:metabolism; D014158:Transcription, Genetic; D015533:Transcriptional Activation; D014162:Transfection; D014779:Virus Replication
chemical_list: D016915:AIDS Vaccines; D018076:DNA, Complementary; D004279:DNA, Viral; D011993:Recombinant Fusion Proteins