Size and position of truncations in the carboxy-terminal region of major capsid protein VP1 of hamster polyomavirus expressed in yeast determine its assembly capacity.
Arch Virol
; 151(9): 1811-25, 2006 Sep.
Article
em En
| MEDLINE
| ID: mdl-16575481
ABSTRACT
The hamster polyomavirus major capsid protein VP1 was modified in its carboxy-terminal region by consecutive truncations and single amino acid exchanges. The ability of yeast-expressed VP1 variants to form virus-like particles (VLPs) strongly depended on the size and position of the truncation. VP1 variants lacking 21, 69, and 79 amino acid (aa) residues in their carboxy-terminal region efficiently formed VLPs similar to those formed by the unmodified VP1 (diameter 40-45 nm). In contrast, VP1 derivatives with carboxy-terminal truncations of 35 to 56 aa residues failed to form VLPs. VP1 mutants with a single A336G aa exchange or internal deletions of aa 335 to aa 346 and aa 335 to aa 363 resulted in the formation of VLPs of a smaller size (diameter 20 nm). These data indicate that certain parts of the carboxy-terminal region of VP1 are not essential for pentamer-pentamer interactions in the capsid, at least in the yeast expression system used.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polyomavirus
/
Montagem de Vírus
/
Virossomos
/
Proteínas do Capsídeo
Idioma:
En
Revista:
Arch Virol
Ano de publicação:
2006
Tipo de documento:
Article
País de afiliação:
Lituânia