“…While the first PMCA was discovered a long time ago (Schatzmann, 1966), it was only recently found that the glycoproteins neuroplastin (NPTN) and basigin (BSG/CD147/EMMPRIN) can serve as subunits for PMCAs, and that they are essential for their plasma membrane localization and activity in a tissue-specific manner (Gong et al, 2018;Korthals et al, 2017;Schmidt et al, 2017). For example, in neurons the interaction of PMCA1 and PMCA2 with NPTNs NP55 and NP65 supports proper localization of these pumps into GM1 ganglioside-enriched lipid rafts (Ilic, Lin et al, 2021). NPTN controls PMCA expression in postsynaptic neurons, inner ear hair cells and T cells, and the NPTN-PMCA complex plays a crucial role in the regulation of synaptic plasticity, hearing and T cell activation Korthals et al, 2017;Lin et al, 2021;Malci et al, 2022).…”