bioRxiv preprint doi: https://doi.org/10.1101/2020.02.26.966754; this version posted March 2, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 1 A systematic, label-free method for identifying RNA- associated proteins in vivo provides insights into vertebrate ciliary beating Kevin Drew*, Chanjae Lee*, Rachael M. Cox, Vy Dang, Caitlin C. Devitt, Ophelia Papoulas, Ryan L. Huizar, Edward M. Marcotte** and John B. Wallingford** Dept. of Molecular Biosciences, Center for Systems and Synthetic Biology, University of Texas, Austin, TX 78712 *These authors contributed equally **To whom correspondence should be addressed: John Wallingford Patterson Labs 2401 Speedway Austin, Texas 78712
[email protected] 512-232-2784 Edward Marcotte 2500 Speedway, MBB 3.148BA Austin, Texas 78712
[email protected] 512-471-5435 bioRxiv preprint doi: https://doi.org/10.1101/2020.02.26.966754; this version posted March 2, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY 4.0 International license. 2 Abstract: Cell-type specific RNA-associated proteins (RAPs) are essential for development and homeostasis in animals. Despite a massive recent effort to systematically identify RAPs, we currently have few comprehensive rosters of cell-type specific RAPs in vertebrate tissues. Here, we demonstrate the feasibility of determining the RNA-interacting proteome of a defined vertebrate embryonic tissue using DIF-FRAC, a systematic and universal (i.e., label-free) method.