5' exoribonucleases, is a multi-protein complex that degrades various types of ribonucleic acids (RNA). Exosome component 10 (EXOSC10, PMSCL2, "polymyositis/scleroderma autoantigen 2, 100kDa) is an exoribonuclease that shares sequence similarity to budding yeast Rrp6 and is proposed to catalyze 3'-to-5' exoribonuclease activity on a variety of nuclear transcripts including ribosomal RNA subunits, RNA that has been poly-adenylated by TRAMP, as well as other nuclear RNA transcripts destined for processing and/or destruction.