CACNG7 and spinocerebellar ataxia type 23: CACNG7 encodes TARP g-7, which is related to stargazing, has been found to be reduced in mouse models of spinocerebellar ataxia type 23 (SCA24).57 In the screen, CACNG7 knockdown increased neuronal excitability and we observe a general increase in neuronal excitability in CACNG7 knockdown neurons in independent experiments (Figure 5b).