3'-exoribonuclease that has a preference for poly(A) tails of mRNAs, thereby efficiently degrading poly(A) tails. Exonucleolytic degradation of the poly(A) tail is often the first step in the decay of eukaryotic mRNAs. Essential for early development, possibly by participating in silencing certain maternal mRNAs translationally. May have a pivotal role in stress response. Exonucleolytic cleavage of poly(A) to 5'-AMP. Only cytoplasmic. Widely expressed. Expressed in roots, stems, leaves and flowers. May be due to a competing acceptor splice site. May be due to intron retention. Belongs to the CAF1 family. Wrong choice of frame.