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The 26S proteasome is a multicatalytic proteinase complex with a highly ordered structure composed of 2 complexes, a 20S core and a 19S regulator. The 20S core is composed of 4 rings of 28 non-identical subunits\; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. The 19S regulator is composed of a base, which contains 6 ATPase subunits and 2 non-ATPase subunits, and a lid, which contains up to 10 non-ATPase subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes a non-ATPase subunit of the 19S regulator. Three transcript variants encoding two different isoforms have been found for this gene.
26S proteasome non-ATPase regulatory subunit 9
, 26S proteasome regulatory subunit p27
, homolog of rat Bridge 1
, proteasome 26S non-ATPase regulatory subunit 9
, transactivating protein Bridge-1
, proteasome (prosome, macropain) 26S subunit, non-ATPase, 9
, proteasome 26S non-ATPase subunit 9
, PDZ domain-containing protein