Predicted to enable cholesterol binding activity; cholesterol transfer activity; and phospholipid binding activity. Predicted to be involved in cellular response to cholesterol and cholesterol homeostasis. Predicted to be located in endoplasmic reticulum membrane; endoplasmic reticulum-plasma membrane contact site; and plasma membrane. Orthologous to human GRAMD1B (GRAM domain containing 1B). [provided by Alliance of Genome Resources, Apr 2022]