Papers

1 1996

Sequence variability of borna disease virus open reading frame II found in human peripheral blood mononuclear cells

JOURNAL OF VIROLOGY
  • M Kishi
  • ,
  • Y Arimura
  • ,
  • K Ikuta
  • ,
  • Y Shoya
  • ,
  • PK Lai
  • ,
  • M Kakinuma

Volume
70
Number
1
First page
635
Last page
640
Language
English
Publishing type
Research paper (scientific journal)
Publisher
AMER SOC MICROBIOLOGY

A cDNA fragment of the Borna disease virus (BDV) open reading frame II (ORF-II), which encodes a 24-kDa phosphoprotein (p24 [P protein]), was amplified from total RNA of peripheral blood mononuclear cells (PBMC) from three psychiatric inpatients. The amplified cDNA fragments mere cloned, sequenced, and analyzed. A total of 15 clones, 5 from each patient, were studied. Intrapatient divergencies of the BDV ORF-II nucleotide sequence were 4.2 to 7.3%, 4.8 to 7.3%, and 2.8 to 7.1% for the three patients, leading to differences of 7.7 to 14.5%, 10.3 to 17.1%, and 6.0 to 16.2%, respectively, in the deduced amino acid sequence for BDV p24. Interpatient divergencies among the 15 clones were 5.9 to 12.7% at the nucleotide level and 12.8 to 28.2% at the amino acid level. Thus, in p24, BDV in human PBMC of the patients undergoes mutation at high rates in vivo. Additionally, we found that the nucleotide Sequence of the 15 human BDV ORF-II cDNA clones differed from those of the horse strains V and He/80-1 by 4.2 to 9.3%. However, comparison of the consensus amino acid sequence deduced from the 15 human clones with those of the horse strains revealed no human-specific amino acid residue, suggesting that the BDV infecting humans may be related to that infecting horses.

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