"Ribbon view" of the human exosome complex. PDB 2NN6. The channel through which RNA passes during degradation is visible at the center of the protein complex The exosome complex is a protein complex which can degrade RNA strands (~stop them working). In eukaryotic cells , the exosome complex is present in the cytoplasm , nucleus , and especially the nucleolus .
The core of the complex has a ring structure consisting of six proteins that all belong to the same class of RNases , the 'RNase PH-like proteins'.[ 1]
Exosome complexes are found in both eukaryotic cells and archaea . In bacteria a simpler complex called the degradosome carries out similar functions.
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