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. 1989 May;63(5):1959–1966. doi: 10.1128/jvi.63.5.1959-1966.1989

Regulation of human immunodeficiency virus env expression by the rev gene product.

M L Hammarskjöld 1, J Heimer 1, B Hammarskjöld 1, I Sangwan 1, L Albert 1, D Rekosh 1
PMCID: PMC250609  PMID: 2704072

Abstract

A single simian virus 40 late replacement vector which expresses both the rev and envelope (env) genes of human immunodeficiency virus was used to examine the mechanism underlying the dependence of env gene expression on the rev protein. When rev was deleted from the vector, no envelope protein expression could be detected in transfected cells, and the levels of cytoplasmic env mRNA were dramatically reduced. In contrast to this, the levels of env RNA in total cellular RNA preparations were similar with or without rev coexpression, and analysis of nuclear RNA showed that the levels of nuclear env RNA were increased in the absence of rev. These results suggest that rev functions to regulate nuclear export of env mRNA. It was possible to restore env expression from the vector lacking rev by supplying rev in trans, provided that a cis-acting sequence was also present. This sequence was mapped to a 854-base-pair region within the env open reading frame, and it was shown that the sequence could be moved but that it worked only in its original orientation.

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Selected References

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