Optimized Infra-red photoactivatable ribonucleoside-enhanced crosslinking and immunoprecipitation (IR-PAR-CLIP) protocol identifies novel IGF2BP3-interacting RNAs in colon cancer cells

We report the PAR-CLIP data for endogenous IGF2BP3 protein in colorectal carcinoma cell line (HCT116). In this study, we established an immunoprecipitation protocol to obtain highly pure endogenous IGF2BP3-RNA complexes and compared RNase cleavage conditions. The PAR-CLIP protocol was modified to use single adapter circular ligation approach to increase the efficiency in library preparation and reduce sequence bias. Moreover, we implemented the use of highly-sensitive infra-red (IR) fluorescent dyes instead of radioactive probes to visualize IGF2BP3-crosslinked RNAs. We named the modified method “IR-PAR-CLIP”. Overall design: Photoactivatable-Ribonucleoside-Enhanced Crosslinking and Immunoprecipitation (PAR-CLIP) of IGF2BP3 in HCT116 cells