What is "nucleasome"

Nucleasome is a macromolecular complex that degrades mRNAs into nucleotides. Like Proteasome it exhibits a barrel-like architecture that appears to have evolved to restrict substrate access and prevent indiscriminate degradation.

Formerly this macromolecule is designated as " exosome". Particularly, because exosome is also defined as "a vesicle excreted by mammalian cells" - Exosome (vesicle), and the similar barrel-like structure that degrade proteins is named proteasome, it is reasonable to name the "nucleotide chain degrading machine" nucleasome.