{"symbol":"PSMB3","synonyms":["HC10-II"],"name":"proteasome (prosome, macropain) subunit, beta type, 3","description":"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]","ncbiEntrezGeneId":5691,"ncbiEntrezGeneUrl":"http://www.ncbi.nlm.nih.gov/gene/5691","proteins":[{"symbol":"PSB3_HUMAN","href":"/api/1.0/protein/PSB3_HUMAN"}],"hgncRootFamilies":[{"name":"Proteasome (prosome, macropain) subunits (PSM)","href":"/api/1.0/gene_family/Proteasome+%28prosome%2C+macropain%29+subunits+%28PSM%29"}]}