Conformational changes during proteolytic processing of a picornavirus capsid proteins
| Autor: | J. H. Martin, Michael Smyth, Elizabeth M. Hoey, A. Trudgett, S. J. Martin |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Conformational change medicine.diagnostic_test Picornavirus Protein Conformation viruses Proteolysis Picornaviridae Peptide General Medicine Biology Cleavage (embryo) biology.organism_classification Virology Epitope Capsid chemistry Biochemistry medicine Animals Humans |
| Zdroj: | Archives of Virology. 145:1473-1479 |
| ISSN: | 1432-8798 0304-8608 |
| DOI: | 10.1007/s007050070104 |
| Popis: | We have used synthetic peptide antibodies to probe conformational changes that occur during the cleavage cascade which generates the capsid proteins of a picornavirus. The initial translation product of 97 kDa, the precursor of all four structural proteins, is cleaved to form a 63 kDa fragment which, we show, has significantly different folding characteristics to both its larger parent and its products. We demonstrate that proteolytic cleavages as distant as 520 residues from epitopes confer sufficiently large conformational changes as to render them unrecognisable. To our knowledge, this is the first demonstration of this phenomenon in the picornavirus system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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