EXOSC1 is a symbol for the gene, Exosome component 1, in humans. Other names include: Exosome complex component CSL4; CSL4 exosomal core protein homolog (yeast); CGI-108; CSL4; Csl4p; SKI4; Ski4p; hCsl4p. The encoded protein has an amino acid length of 195 and a mass of 21.5 kDa. Other isoforms may exist. EXOSC1 is a member of the CSL4 family. This gene shares homology with other species, including: Mouse, Rat, Zebrafish, Frog, Chicken.