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Characterization of a Sindbis virus variant with altered host range

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Summary

A variant of Sindbis virus which is much more infectious for mouse cells than the standard virus has been examined for biochemical properties which might be responsible for this biological difference. The variant has a much enhanced ability to adsorb to mouse plasmacytoma (MOPC 315) cells, but when these cells were pretreated with heparin, they were able to adsorb the standard virus almost as well as the variant. This suggested that there was a surface charge difference between variant and standard virus. Differential elution of the viruses from hydroxyapatite and the results of isoelectric focusing of the virion glycoproteins substantiate this interpretation. Both viral glycoproteins E1 and E2 from the variant were more negatively charged than those of the standard virus but we were unable to find changes in tryptic peptides of the variant. Differences were found in stability of the two virus strains to heat and proteolytic enzymes.

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Symington, J., Schlesinger, M.J. Characterization of a Sindbis virus variant with altered host range. Archives of Virology 58, 127–136 (1978). https://doi.org/10.1007/BF01315405

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