Predicted to enable 3'-5'-exoribonuclease activity; RNA binding activity; and polyribonucleotide nucleotidyltransferase activity. Involved in mitochondrial mRNA catabolic process; mitochondrion morphogenesis; and regulation of cellular respiration. Located in mitochondrial intermembrane space. Is expressed in central nervous system and sensory organ. Human ortholog(s) of this gene implicated in autosomal recessive nonsyndromic deafness 70 and combined oxidative phosphorylation deficiency 13. Orthologous to human PNPT1 (polyribonucleotide nucleotidyltransferase 1). [provided by Alliance of Genome Resources, Apr 2022]