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Journal of Virology, November 2000, p. 10822-10826, Vol. 74, No. 22
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.

Concerted Action of Multiple cis-Acting Sequences Is Required for Rev Dependence of Late Human Immunodeficiency Virus Type 1 Gene Expression

Marcus Graf, Alexandra Bojak, Ludwig Deml, Kurt Bieler, Hans Wolf, and Ralf Wagner*

Institute of Medical Microbiology and Hygiene, University of Regensburg, D-93053 Regensburg, Germany

Based on the human immunodeficiency virus type 1 (HIV-1) gag gene, subgenomic reporter constructs have been established allowing the contributions of different cis-acting elements to the Rev dependency of late HIV-1 gene products to be determined. Modification of intragenic regulatory elements achieved by adapting the codon usage of the complete gene to highly expressed mammalian genes resulted in constitutive nuclear export allowing high levels of Gag expression independent from the Rev/Rev-responsive element system and irrespective of the absence or presence of the isolated major splice donor. Leptomycin B inhibitor studies revealed that the RNAs derived from the codon-optimized gag gene lacking AU-rich inhibitory elements are directed to a distinct, CRM1-independent, nuclear export pathway.

* Corresponding author. Mailing address: Institute of Medical Microbiology and Hygiene, University of Regensburg, Franz-Josef-Strauss-Allee 11, D-93053 Regensburg, Germany. Phone: 49 941 944 6452. Fax: 49 941 944 6402. E-mail: ralf.wagner{at}klinik.uni-regensburg.de.

Journal of Virology, November 2000, p. 10822-10826, Vol. 74, No. 22
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.


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