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. 1992 Mar;11(3):1119–1129. doi: 10.1002/j.1460-2075.1992.tb05152.x

Specific binding of a basic peptide from HIV-1 Rev.

J Kjems 1, B J Calnan 1, A D Frankel 1, P A Sharp 1
PMCID: PMC556554  PMID: 1547776

Abstract

Human immunodeficiency virus type I (HIV-1) encodes a regulatory protein, Rev, which is required for cytoplasmic expression of incompletely spliced viral mRNA. Rev activity is mediated through specific binding to a cis-acting Rev responsive element (RRE) located within the env region of HIV-1. A monomer Rev binding site corresponding to 37 nucleotides of the RRE (IIB RNA) was studied by RNA footprinting, modification interference experiments and mutational analysis. Surprisingly, a 17 amino acid peptide, corresponding to the basic domain of Rev, binds specifically to this site at essentially identical nucleotides and probably induces additional base pairing. The Rev protein and related peptide interact primarily with two sets of nucleotides located at the junction of single and double stranded regions, and at an additional site located within a helix. This suggests that the domains of proteins responsible for specific RNA binding can be remarkably small and that the interaction between RNA and protein can probably induce structure in both constituents.

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