Predicted to enable oxidoreductase activity. Involved in response to nutrient. Predicted to be located in cytosol; mitochondrial inner membrane; and nucleoplasm. Predicted to be part of mitochondrial respiratory chain complex IV. Biomarker of protein-energy malnutrition. Human ortholog(s) of this gene implicated in cytochrome-c oxidase deficiency disease. Orthologous to human COX4I1 (cytochrome c oxidase subunit 4I1). [provided by Alliance of Genome Resources, Apr 2022]