Predicted to enable proton transmembrane transporter activity. Predicted to contribute to proton-transporting ATP synthase activity, rotational mechanism. Involved in ATP metabolic process and cellular response to peptide. Part of mitochondrial proton-transporting ATP synthase complex, coupling factor F(o). Used to study mental depression. Biomarker of congenital hypothyroidism. Orthologous to human ATP5PD (ATP synthase peripheral stalk subunit d). [provided by Alliance of Genome Resources, Apr 2022]