Updated project metadata. We generated a new mouse model with three copies of the HA epitope and eGFP knocked-in frame into the endogenous mouse Pkd1 gene by CRISPR/Cas9. The modified allele is fully functional. Using nanobody-coupled beads and large quantities of tissue (8 heads of P1 newborn mice / experiment / condition), we immunoprecipitated a PC1 interactome that was characterized by mass spectrometry.