Robust single-cell discovery of RNA targets of RNA binding proteins and ribosomes [NP]

RNA binding proteins (RBPs) are critical regulators of gene expression and RNA processing that are required for gene function. Yet, the dynamics of RBP regulation in single cells is unknown. To address this gap in understanding, we developed STAMP (Surveying Targets by APOBEC Mediated Profiling), which efficiently detects RBP RNA interactions. STAMP does not rely on UV crosslinking or immunoprecipitation and, when coupled with single cell capture, can identify RBP and cell type specific RNA protein interactions for multiple RBPs and cell types in single pooled experiments. Pairing STAMP with long read sequencing also yields RBP target sites for full length isoforms. Finally, conducting STAMP using small ribosomal subunits (RiboSTAMP) allows analysis of transcriptome wide ribosome association in single cells. STAMP enables the study of RBP RNA interactomes and translational landscapes with unprecedented cellular resolution. This data was generated using a strategy for immunoprecipitation-free detection of protein-RNA interactions by fusion of RNA binding proteins and ribosomal subunits to the C-to-U RNA editing enzyme APOBEC1 and quantification of interaction-driven edits by sequencing, to allow interaction detection on long-read and single-cell platforms.