To understand how TAZ is regulated in the nucleus, we searched for proteins interacting with TAZ by a proximity‐dependent biotinylation approach known as BioID (Figure 1A).[19] TAZ was fused to BirAR118G, a mutant of the E. coli biotin ligase, and stably expressed in LN229 human glioblastoma cells (Figure S1A, Supporting Information). This evidence concerns the gene WWTR1 and glioblastoma.