CACNA1C and major depressive disorder: According to previous reports, Cacna1c, Camk2a, Camk2g, Grin2a, and Stx1a are all candidate genes for depression (Calabrò et al., 2019; Y. Kim et al., 2016; Mitra et al., 2018; Wingo et al., 2018; Yawalkar et al., 2018).