Predicted to enable ATPase binding activity; ATPase inhibitor activity; and protein homodimerization activity. Predicted to act upstream of or within several processes, including erythrocyte differentiation; negative regulation of mitochondrial ATP synthesis coupled proton transport; and protein homotetramerization. Predicted to be located in mitochondrion. Orthologous to human ATP5IF1 (ATP synthase inhibitory factor subunit 1).