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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

The activation domain of simian immunodeficiency virus SIVmac239 Rev protein is structurally and functionally analogous to the HIV-1 Rev activation domain.

The Rev proteins of primate immunodeficiency viruses are essential transactivators for the switch from early to late phase in the viral replication cycle. By mutational analysis, a putative activation domain (AD) has been assigned to the carboxy-terminus. This leucine-rich stretch of amino acids proved to be essential for the transactivating properties of HIV-1 Rev. Some mutants in the AD transdominantly inhibit the function of wild-type Rev protein very efficiently. We identified a similar domain structure for SIVmac239 Rev by sequence comparison and in vitro mutagenesis. The leucine/isoleucine residues of the SIVmac239 Rev activation domain appeared to be of similar importance for function. The mutants of these residues in the SIV AD displayed a dominant negative phenotype on both HIV-1 and SIVmac 239 rev-responsive elements (RRE). The prokaryotically expressed wild-type and mutant proteins were analyzed for RNA-binding properties in a gel-shift assay in vitro. This assay revealed a similar binding pattern of wild-type and transdominant proteins on either RRE.[1]


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