Enables phospholipid scramblase activity. Acts upstream of or within calcium activated galactosylceramide scrambling; calcium activated phosphatidylcholine scrambling; and calcium activated phosphatidylserine scrambling. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Is expressed in dorsal root ganglion and trigeminal ganglion. Orthologous to human ANO4 (anoctamin 4). [provided by Alliance of Genome Resources, Apr 2022]