Cytoplasmic 5' exoribonuclease; transcriptomics wide distributive exonuclease; involved in cytoplasmic mRNA degradation, turnover of tRNA introns and processing of spliceosomal introns; required for the final 5'-end processing of 25S rRNA; minor contributor to No-Go Decay and the unfolded protein response; decapping protein involved in surveillance and removal of non-canonical nicotinamide adenine dinucleotide (NAD) capped nuclear mRNAs (NAD-RNAs); sequence similarity to Rai1p