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. 2021 Jan 18;58(6):2523–2541. doi: 10.1007/s12035-020-02276-8

Fig. 3.

Fig. 3

Sig-1R translocates to the nuclear envelope via Sec61β. a Sig-1R interacts with Sec61β. In N2a cells, HA-tagged Sec61β and Sig-1R-EYFP were overexpressed. Immunoprecipitation with GFP antibody shows an interaction between Sig-1R and Sec61β. b Sig-1R colocalizes with endogenous Sec61β. Confocal images demonstrate colocalization of immunoreactive EYFP-tagged Sig-1R (green) and Sec61β (red) in Sig-1R-EYFP overexpressing N2a cells. c Increase of Sig-1R in nuclear fraction in HA-Sec61β-expressing N2a cells. Subcellular fractionation followed by western blotting shows an increase of Sig-1R in the nuclear fraction (left and middle panels) as reflected in the nuclear/cytosol ratio (right panel). d Colocalization of Sig-1R and emerin in Sig-1R-EYFP and HA-Sec61β overexpressing N2a cells. Confocal images indicate perinuclear colocalization of immunoreactive EYFP-tagged Sig-1R (green) and emerin (red). Data are shown as means ± SEM; Student’s t test; *P < 0.05, ***P < 0.001