Six strains of human immunodeficiency virus type 1 isolated in Japan and their molecular phylogeny

Nobuaki Shimizu, Yashuhiro Takeuchi, Takuji Naruse, Minoru Inagaki, Etsuko Moriyama, Takashi Gojobori, Hiroo Hoshino

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Five strains of human immunodeficiency virus type 1 (HIV-1) were isolated from five Japanese hemophilia patients. Two isolates, HIV1[GUN-1] and HIV-1[GUN-2], were from brother patients with hemophilia B and the other three isolates, HIV-I[GUN-3], HIV-1[GUN-4], and HIV1[GUN-5], were from hemophilia A patients. Another HIV-1 strain, HIV-1[GUN-6], was isolated from a Canadian male homosexual with AIDS. The restriction endonuclease cleavage maps of the proviral genomes of these six HIV-1 strains revealed that they were apparently different from each other. The phylogenetic trees constructed using restriction maps and nucleotide sequences were quite similar, indicating that phylogenetic analyses of Japanese HIV-1 isolates can be done using restriction maps of the proviruses. Phylogenetic analyses showed that they were more closely related to HIV-1s which had been reported to be isolated from homosexual patients in the United States than those isolated from African patients. In particular, GUN-1 and GUN-2 isolates were on the branch of a San Francisco isolate, ARV2, while GUN-5 and GUN-6 isolates were on the branch of HTLV-IIIB-related isolates.

Original languageEnglish (US)
Pages (from-to)329-336
Number of pages8
JournalJournal of Molecular Evolution
Issue number4
StatePublished - Oct 1992
Externally publishedYes


  • AIDS
  • HIV-1 isolate
  • Japanese hemophiliac
  • Phylogenetic tree
  • Restriction map

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Molecular Biology
  • Genetics


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