Journal: Cellular and Molecular Life Sciences: CMLS
Article Title: ZIP-ZnT1 complexes mediate a local Zn 2+ -cycle regulating neuronal Zn²⁺ transport
doi: 10.1007/s00018-026-06137-w
Figure Lengend Snippet: ZIP1- ZnT1 physical interaction in the hippocampus. A . Co-immunoprecipitation assay using SH-SY5Y cells that were immunoprecipitated with ZnT1 and then exposed to ZIP1 (left panel) or ZIP3 (right panel) antibodies. Note that the right panel is taken from the gel presented in Fig. , the right lane for mGluN2A-ZIP3-ZnT1 expressing cells overlaps with that figure. Note that expected MW for ZIP3 is 37 kDa, identified MW likely represents its dimerization and glycosylation; full blots shown in Supplementary Information. B . Representative traces of fluorescent imaging of FluoZin-3 changes in SH-SY5Y cells expressing ZnT1 + ZIP1 (green) or ZnT1 + PCDNA as control (blue). Cells were perfused with 200 µM Zn 2+ in Ringer’s solution added at the indicated time, with or without pyrithione (see methods). The initial Zn 2+ influx (middle panel) and efflux (right panel) rates are shown in the bar graphs. Unpaired t-test analysis, *** p-value: 0.0001, t(23) = 5.613. C . Co-immunoprecipitation assay using DCN and hippocampal lysates. Protein samples were immunoprecipitated with antibodies against ZIP1, followed by SDS-PAGE separation and immunoblotting with antibodies against GluN2A. D . Proximity ligation assay (PLA) performed on CA3 hippocampal slices using probes for GluN2A and either ZnT1 or ZIP1. Red puncta represent the GluN2A-ZnT1 or ZIP1 interaction in the CA3 pyramidal cell layer (marked by white lines). Analysis of PLA puncta, performed with the GluN2A and either ZnT1, ZIP1 or ZIP3, on CA3 pyramidal layer to assess protein–protein interactions in postsynaptic cells. The graph (bottom panel) quantifies PLA puncta normalized to ZnT1-GluN2A puncta. Statistical analysis Dunnett’s multiple comparisons test, p-value: 0.013, F (2, 6) = 9.81. E . Schematic presentation of the Zn 2+ -cycle proteins, ZIP1-ZnT1-GluN2A, expressed on the postsynaptic CA3 pyramidal cells that are adjacent to the ZnT-3 and ZIP3 expressing mossy fiber terminals, consistent with previous work
Article Snippet: GluN2A , NeuroMab , 75,288 , 1:300.
Techniques: Co-Immunoprecipitation Assay, Immunoprecipitation, Expressing, Glycoproteomics, Imaging, Control, SDS Page, Western Blot, Proximity Ligation Assay, Protein-Protein interactions