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. 2023 Sep 5;6:911. doi: 10.1038/s42003-023-05269-0

Fig. 3. The proline-rich domain is required for efficient INPP5E recruitment at the immune synapse.

Fig. 3

a Diagrams of INPP5E truncations. Proline-rich domain (PRD), inositol polyphosphate phosphatase catalytic (IPPc) domain, CaaX motif are marked in yellow, blue, and purple, respectively. The CTS indicates the ciliary targeting sequence. b Jurkat cells were transfected with different truncations of Flag-INPP5E. The expression levels of Flag-INPP5E truncations were examined by western blots. α-tubulin was used as the loading control. c Immunostaining of Flag-INPP5E truncations in conjugates of Jurkat T cells and CMAC-labeled SEE-pulsed APCs. Cells were co-stained with anti-CD3ε as an immune synapse marker. Scale bar: 10 μm. d Quantification of the Flag-INPP5E recruitment index (upper) and the percentage of conjugates with Flag-INPP5E truncations at the immune synapse (lower) is shown. The recruitment of Flag-INPP5E truncations to the immune synapse was shown by the scatter plot graph. 30–50 conjugates were quantified for each INPP5E mutant. Images are representative of two experiments. Error bars indicate mean ± SD. One-way ANOVA analysis. *P ≤ 0.05. **P ≤ 0.005. ****P < 0.0001. e Summary of INPP5E truncations in the localization of primary cilia and immune synapse (IS).