PSMD1

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 the largest non-ATPase subunit of the 19S regulator lid, which is responsible for substrate recognition and binding. There is evidence that this proteasome and its subunits interact with viral proteins, including those of coronaviruses. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Aug 2020]

Description

Proteasome 26S subunit, non-ATPase 1

Tissue specificity

Low tissue specificity

Subcell location

Nucleoplasm, Actin filaments

Predicted location

Intracellular, Membrane

Protein family

Mapped to neXtProt
Mapped to UniProt SWISS-PROT
Plasma proteins
Predicted intracellular proteins
Predicted membrane proteins
Protein evidence (Ezkurdia et al 2014)
Protein evidence (Kim et al 2014)

Chromosome

2 (231056845 - 231173116)

Ensembl ID

ENSG00000173692  (ver. 103.38)

Orthologs

Mouse Psmd1: ENSMUSG00000026229

UniProt

Q99460

neXtProt

NX_Q99460

Human splice variants
Mouse splice variants

Protein structure