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. 1990 May;64(5):2047–2056. doi: 10.1128/jvi.64.5.2047-2056.1990

Adenovirus type 5 packaging domain is composed of a repeated element that is functionally redundant.

M Gräble 1, P Hearing 1
PMCID: PMC249360  PMID: 2325200

Abstract

Previous analyses have demonstrated that adenovirus DNA is packaged into virions in vivo in a polar, left-to-right fashion. The packaging of viral DNA is dependent on cis-acting elements at the left end of the genome. In this report, we describe a genetic analysis of the sequences that are required for efficient packaging of adenovirus type 5 (Ad5) DNA. Our results demonstrate that the Ad5 packaging domain (nucleotides 194 to 358) is composed of at least five distinct elements that are functionally redundant. An AT-rich repeated sequence motif, the A repeat, is located in four of five of these regions; the fifth region is also AT rich. The efficiency of viral packaging depends on the number of individual A repeats that are present in the viral genome. The deletion of the entire packaging domain resulted in the loss of virus viability. A virus that contains a multimerized oligonucleotide corresponding to A repeat II in place of the packaging domain could package viral DNA, although with reduced efficiency compared with that of the wild-type virus. Our results also suggest that the spacing of specific sequences at the left end of the Ad5 genome are important for enhancer region function in vivo.

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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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