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. 1992 Nov;66(11):6784–6787. doi: 10.1128/jvi.66.11.6784-6787.1992

Construction and characterization of a human cytomegalovirus mutant with the UL18 (class I homolog) gene deleted.

H Browne 1, M Churcher 1, T Minson 1
PMCID: PMC240178  PMID: 1328689

Abstract

The UL18 open reading frame of human cytomegalovirus (HCMV) (which encodes a product homologous to major histocompatibility complex class I heavy chains) has been disrupted by insertion of the beta-galactosidase gene under control of the major HCMV early promoter. The recombinant virus delta UL18 showed no phenotypic differences from wild-type HCMV in terms of single-step growth curves or particle/infectivity ratios, indicating that the UL18 gene product is dispensable for the growth of HCMV in human fibroblasts in vitro. The synthesis of the mature cellular class I heterodimer is shut down in cells infected at a high multiplicity with wild-type HCMV, and a similar effect was seen in delta UL18-infected fibroblasts, suggesting that although the UL18 gene product can associate with beta 2 microglobulin, it is not directly involved in the disruption of class I assembly.

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Selected References

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