Summary
Establishment of persistency is the common result of hepatitis A virus (HAV) infection in most HAV/cell culture systems. Previous studies provided evidence that shortly before or concomitantly with establishment of persistent infections synthesis of viral RNA is down-regulated. This may be an effect of regulating factors. Using RNA/protein binding assays it was shown that, at the critical time during virus replication, proteins accumulate which interact specifically with a distinct nucleotide sequence (HPE) within the 3′ non-coding region of the HAV genome and/or (HME) within the 5′ terminal region of the HAV antigenome. The sequences consist of 23 nucleotides (HPE: 5′-AAAUUUUCUUAAAAUUUCUGAGG-3′; HME: 5′-CCUCAGAAAUUUUAAGAAAAUUU-3′). A sequence with 79% similarity was found in the corresponding 3′ non-coding region of poliovirus type I (Sabin) RNA. The latter sequence was shown to bind proteins from HAV infected cells but comparable proteins were absent in cells infected poliovirus.
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Nüesch, J.P.F., Weitz, M. & Siegl, G. Proteins specifically binding to the 3′ untranslated region of hepatitis A virus RNA in persistently infected cells. Archives of Virology 128, 65–79 (1993). https://doi.org/10.1007/BF01309789
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DOI: https://doi.org/10.1007/BF01309789