%0 Journal Article %A Siegl, Günter %A Frösner, Gert G. %A Gauss-Müller, Verena %A Tratschin, Jon-Duri %A Deinhardt, Friedrich %T The Physicochemical Properties of Infectious Hepatitis A Virions %D 1981 %J Journal of General Virology, %V 57 %N 2 %P 331-341 %@ 1465-2099 %R https://doi.org/10.1099/0022-1317-57-2-331 %K picornavirus %K HAV RNA %K physicochemical properties %K hepatitis A virus %I Microbiology Society, %X SUMMARY The propagation of hepatitis A virus (HAV) in the cell line PLC/PRF/5 made possible the radiolabelling in vivo of mature, infectious hepatitis A virions and the determination of their physicochemical properties. In contrast to poliovirus type 2 (160S, 1.340 g/ml), HAV had a sedimentation coefficient of 156 ± 2S and a buoyant density of 1.332 g/ml in CsCl. The genome of HAV consisted of linear single-stranded RNA which sedimented at 32.5S under non-denaturing conditions. Compared to the size and sedimentation behaviour of poliovirus RNA (2.6 × 106 mol. wt., 35S) this corresponds to a mol. wt. of 2.3 × 106. Electrophoresis under fully denaturing conditions, however, revealed a mol. wt. of 2.8 × 106 and indicates the existence of relatively extended regions with secondary structure. The purified virus genome, containing a poly(A) sequence, served as a messenger for the synthesis of virus antigen in PLC/PRF/5 cells. Finally, in accordance with previous observations, the capsid of the virion was found to be constructed of three major polypeptides (VP1, 31 × 103; VP2, 26 × 103; VP3, 21 × 103 mol. wt.) and of two less readily demonstrable components probably corresponding to VP4 (8 × 103 to 10 × 103 mol. wt.) and the precursor polypeptide VP0 (40 × 103 mol. wt.). %U https://www.microbiologyresearch.org/content/journal/jgv/10.1099/0022-1317-57-2-331