Predicted to enable aspartic endopeptidase activity, intramembrane cleaving. Involved in response to hypoxia. Located in early endosome; synaptic membrane; and synaptic vesicle. Is integral component of presynaptic membrane. Human ortholog(s) of this gene implicated in Alzheimer's disease; Alzheimer's disease 4; breast cancer; and dilated cardiomyopathy 1V. Orthologous to human PSEN2 (presenilin 2). [provided by Alliance of Genome Resources, Apr 2022]