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. 1987 Jan;84(1):21–25. doi: 10.1073/pnas.84.1.21

Implications of the picornavirus capsid structure for polyprotein processing.

E Arnold, M Luo, G Vriend, M G Rossmann, A C Palmenberg, G D Parks, M J Nicklin, E Wimmer
PMCID: PMC304133  PMID: 3467351

Abstract

Mature picornaviral proteins are derived by progressive, posttranslational cleavage of a precursor polyprotein. These cleavages play a role in the control of virus functions. Although the processed termini are separated by as much as 75 A in the native virus capsid, the fold and arrangement of polypeptide chains in a protomer before proteolysis are likely to be similar to that found in the mature virus. The three-dimensional structures of rhinovirus and Mengo virus suggest that the cleavage sites within the protomeric precursor are in structurally flexible regions. The final proteolytic processing event, maturation of the virion peptide VP0 (also called peptide 1AB) appears to occur by an unusual autocatalytic serine protease-type mechanism possibly involving viral RNA basic groups that would serve as proton-abstractors during the cleavage reaction.

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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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