p(MESH:Proteins, pmod(Ub)) increases complex(a(GO:"proteasome regulatory particle"), p(MESH:Proteins, pmod(Ub)))
Ubiquitinated target proteins bind to the 19S cap (RP), which has a Ub binding site and ATPase activity, and this leads to cleavage of Ub moieties from the target by deubiquitinating enzymes, unfolds the polypeptides and sends them to the narrow channel of the 20S core particle.
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.