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. 2023 Feb 21;34(3):ar18. doi: 10.1091/mbc.E22-10-0473

FIGURE 4:

FIGURE 4:

TULP3 traffics ARL13B in a PI(4,5)P2- independent manner unlike GPCR cargoes. (A) Schematic showing mutants. (B) Tulp3 ko IMCD3 line #89 stably expressing HAINPP5E and the indicated LAPTULP3 variants were grown to confluence and serum starved for 36 h before fixation. Cells were immunostained for ARL13B, HA (INPP5E), GPR161, GFP (TULP3), and acetylated tubulin (AcTUB) and counterstained for DNA. *, cytokinetic bridge. (C) Cilia in GFP(TULP3)-expressing cells were counted from three experiments, n > 200/condition. Data represent mean ± SD. (D, E) Violin plot shows mean ciliary intensities from B. n = 50 cilia/condition (ARL13B) and 30 cilia/condition (HAINPP5E). (F) Cilia lengths were measured in B by acetylated tubulin immunostaining (50 cilia each). Scale, 5 μm. ****, p < 0.0001; **, p < 0.01; *, p < 0.05; ns, not significant. Arrows and arrowheads indicate cilia positive and negative for the indicated proteins, respectively.