Catalytic component of the RNA exosome complex which has 3′->5′ exoribonuclease activity and participates in a multitude of cellular RNA processing and degradation events (PubMed:20531386, PubMed:20531389, PubMed:37602378). In the cytoplasm, the RNA exosome complex is involved in general mRNA turnover and specifically degrades inherently unstable mRNAs containing AU-rich elements (AREs) within their 3′ untranslated regions, and in RNA surveillance pathways, preventing translation of aberrant mRNAs. It seems to be involved in degradation of histone mRNA (PubMed:20531386, PubMed:20531389).
