Cellular dsRNA interactome captured by K1 antibody reveals the regulatory map of exogenous RNA sensing

We developed an anti-dsRNA antibody co-immunoprecipitation coupled with quantitative mass spectrometry to comprehensively identify RBPs bound to cellular dsRNAs. To minimize false positives, we conducted a quantitative mass spectrometry analysis under two additional conditions: first, by treating the samples with RNase T1 to degrade single-stranded RNAs, and second, by performing a pull-down using synthetic double-stranded RNA, poly(I:C). The interactomes through these three methods provide an unbiased and thorough characterization of potential dsRBPs bound to cellular dsRNAs.