Enables 5'-3' exoribonuclease activity; G-quadruplex DNA binding activity; and G-quadruplex RNA binding activity. Involved in RNA phosphodiester bond hydrolysis, exonucleolytic. Located in P-body. Human ortholog(s) of this gene implicated in Alzheimer's disease. Orthologous to human XRN1 (5'-3' exoribonuclease 1). [provided by Alliance of Genome Resources, Apr 2022]