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. 1987 Nov;61(11):3596–3601. doi: 10.1128/jvi.61.11.3596-3601.1987

Proteins present in bovine papillomavirus particles.

P M Larsen 1, L Storgaard 1, S J Fey 1
PMCID: PMC255960  PMID: 2822965

Abstract

Analysis by two-dimensional gel electrophoresis and silver staining of heavy full, light full, and empty bovine papillomavirus particles has shown that the major capsid protein L1 is highly modified. Besides exhibiting at least 13 isoelectric point variants of approximately the same molecular mass (54 kilodaltons), it is suggested that an additional heavier protein chain (69 kilodaltons) is also derived from L1 by glycosylation. These modifications may stabilize the particle structure. Treatment with neuraminidase reduces the number of modification products detectable, with a concomitant increase in the more basic forms of L1. Although it was not possible to detect histones in any of the preparations, proteins of similar molecular mass were detected. Therefore, it is suggested that the basic tails of L1 bind to the DNA in a manner similar to that of histone. Calculation of the theoretical mobilities of the papillomavirus proteins shows good agreement with the actual position of L1 and its isoelectric point variants and suggests that two of the proteins with molecular masses similar to those of the histones may actually be coded by the bovine papillomavirus E7 and E5 open reading frames.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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