proteasome (prosome, macropain) activator subunit 1 (PA28 alpha)

Symbol

PSME1 (may also be known as: None)

Organism

Human

Description

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. The immunoproteasome contains an alternate regulator, referred to as the 11S regulator or PA28, that replaces the 19S regulator. Three subunits (alpha, beta and gamma) of the 11S regulator have been identified. This gene encodes the alpha subunit of the 11S regulator, one of the two 11S subunits that is induced by gamma-interferon. Three alpha and three beta subunits combine to form a heterohexameric ring. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

Orthologs

SymbolSpecies
psme1 Danio rerio
Psme1 Mus musculus
Psme1 Rattus norvegicus

Links to external resources

Changes associated with this gene

Changes associated with the orthologs of this gene

Identifier Name Type Tissues Organism Gene Data Actions
DAA1813 proteasome (prosome, macropain) 28 subunit, alpha Molecular muscle Mouse Psme1 4.0% Decrease Gene Expression Level

GO Terms

GO IDGO TermGO Category
GO:0000075 cell cycle checkpoint biological_process
GO:0000082 G1/S transition of mitotic cell cycle biological_process
GO:0000084 S phase of mitotic cell cycle biological_process
GO:0000209 protein polyubiquitination biological_process
GO:0000216 M/G1 transition of mitotic cell cycle biological_process
GO:0000278 mitotic cell cycle biological_process
Show more GO terms