PSMB3

The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure 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. 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 member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit. The 26 S proteasome may be involved in trinucleotide repeat expansion, a phenomenon which is associated with many hereditary neurological diseases. Pseudogenes have been identified on chromosomes 2 and 12. Alternative splicing results in multiple transcript variants [provided by RefSeq, Sep 2013]

Description

Proteasome 20S subunit beta 3

Tissue specificity

Low tissue specificity

Predicted location

Intracellular

Protein family

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

Chromosome

17 (38752741 - 38764225)

Ensembl ID

ENSG00000277791  (ver. 103.38)

Orthologs

Mouse Psmb3: ENSMUSG00000069744

UniProt

P49720

neXtProt

NX_P49720

Human splice variants
Mouse splice variants

Protein structure