Abstract
Dynamic light scattering represents an accurate, robust, and reliable technique to analyze molecule size in solution and monitor their interactions in real time. Here, we describe how to analyze by DLS an RNA-protein interaction. In our frame, we studied complexes formed between RNA fragments derived from the genome of HIV-1 in association with the viral precursor Pr55Gag. These interactions are crucial for the specific selection of the viral genomic RNA (gRNA) from the bulk of the viral spliced and cellular RNAs. This chapter displays how DLS allows to characterize the interactions that regulate the early steps of viral assembly.
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