Is predicted to encode a protein with the following domains: Exoribonuclease, phosphorolytic domain 1; 3' exoribonuclease family, domain 1; Ribosomal protein S5 domain 2-type fold; Exoribonuclease, PH domain 2 superfamily; and PNPase/RNase PH domain superfamily. Is an ortholog of C. elegans exos-4.2.