3'-5'-exoribonuclease that specifically recognizes RNAs polyuridylated at their 3' end and mediates their degradation. Component of an exosome-independent RNA degradation pathway that mediates degradation of both mRNAs and miRNAs that have been polyuridylated by a terminal uridylyltransferase, such as ZCCHC11/TUT4. Mediates degradation of cytoplasmic mRNAs that have been deadenylated and subsequently uridylated at their 3'. Mediates degradation of uridylated pre-let-7 miRNAs, contributing to the maintenance of embryonic stem (ES) cells. Essential for correct mitosis, and negatively regulates cell proliferation. Interacts with XRN1. Specifically recognizes and binds polyuridylated RNAs via 3 RNA-binding regions (named U-zone 1, U-zone 2 and U-zone 3) that form an open funnel on one face of the catalytic domain, allowing RNA to navigate a path to the active site. Disrupted by a t(2;7)(q37.1;q21.3) chromosomal translocation found in a patient suffering from Marfanoid habitus and skeletal anomalies. However, its absence does not seem to be the cause of the disease. The disease is caused by variants affecting the gene represented in this entry. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. May be produced at very low levels due to a premature stop codon in the mRNA, leading to nonsense-mediated mRNA decay. Belongs to the RNR ribonuclease family. DIS3L2 subfamily. Although assigned as two separate genes (DIS3L2 and FAM6A), it is quite clear that the gene FAM6A described by PubMed:11352565 is a fragmentary prediction of DIS3L2.