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Journal of General Virology header logo Journal of General Virology

Volume 74, Issue 9

Discovery of a novel point mutation changing the HDAg expression of a hepatitis delta virus isolate from Central African Republic No Access

Abstract

None of the mutations so far discovered in several hepatitis delta virus (HDV) isolates appears to determine important changes in HDV specific protein (HDAg) expression, except for a putative mutation at nucleotide 1012 converting an amber stop codon (TAG) to a codon for tryptophan (TGG). Here we present the characterization of an HDV obtained from the liver of a woodchuck inoculated with sera from fulminant HDV patients in Central African Republic (CAR). By restriction enzyme analysis and sequencing of HDAg-coding region cDNA clones, we found that this HDV isolate bears a novel mutation (T to A) at nucleotide 1013 which converts the amber stop codon (TAG) to a codon for lysine (AAG). Comparison of these nucleotide sequences with those available from American, Japanese, Taiwanese, French, Italian and Nauru isolates showed a variability of 1.7 to 21.5% and 1.9 to 28.7% at the nucleic acid and amino acid levels, respectively. The HDAg-encoding sequence of the CAR isolate is closely related to that of the Italian HDV isolate. The expression of this HDV isolate resulted in a unique HDAg species (28K) which was identical with that characterized .

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© Society for General Microbiology 1993
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1993-09-01
2025-01-26
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/content/journal/jgv/10.1099/0022-1317-74-9-1827
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Discovery of a novel point mutation changing the HDAg expression of a hepatitis delta virus isolate from Central African Republic
J. Gen. Virol. 74, 1827 (1993); https://doi.org/10.1099/0022-1317-74-9-1827
/content/journal/jgv/10.1099/0022-1317-74-9-1827
/content/journal/jgv/10.1099/0022-1317-74-9-1827
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