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. 1981 Nov;40(2):387–395. doi: 10.1128/jvi.40.2.387-395.1981

Deletion of a 9,000-base-pair segment of the vaccinia virus genome that encodes nonessential polypeptides.

B Moss, E Winters, J A Cooper
PMCID: PMC256639  PMID: 6275095

Abstract

Deletions contained within the genomes of unstable and stable variants of vaccinia virus (strain WR) were analyzed. Restriction endonuclease mapping and hybridization to specific 32P-labeled DNA probes indicated that more than 6 X 10(6) daltons of DNA were deleted from the variants. In each case, the deletion occurred on the left side of the genome and started very close to the junction of the inverted terminal repetition and unique sequence. Both variants also contained a new SstI side on the right side of the genome. Hybridization selection and cell-free translation experiments indicated that these variants lost the ability to synthesize at least eight early mRNA's mapping within the deleted region. Although the deleted DNA was not essential for replication of the WR strain of vaccinia virus under laboratory conditions of infection, it presumably has a defined role under other circumstances. This conclusion was based on the conservation within the Elstree strain of vaccinia, the Utrecht strain of rabbitpox, and the Brighton strain of cowpox virus of sequences homologous to the deleted DNA. Moreover, mRNA's that hybridized to the deleted vaccinia virus DNA segment and encoded similar size polypeptides were made in cells infected with rabbitpox and cowpox viruses.

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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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