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. This gene is located in the class II region of the MHC in the immunoproteasome. Proteolytic processing is required to generate a mature subunit.
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Protein Aliases: large multifunctional peptidase 2; large multifunctional protease 2; LMP-2d; low molecular mass polypeptide 2; Low molecular mass protein 2; Macropain chain 7; MGC70470; Multicatalytic endopeptidase complex chain 7; proteasome (prosome, macropain) subunit, beta type 9 (large multifunctional peptidase 2); proteasome (prosome, macropain) subunit, beta type, 9 (large multifunctional peptidase 2); proteasome beta 9 subunit; proteasome catalytic subunit 1i; Proteasome chain 7; proteasome subunit beta 6i; proteasome subunit beta 9; proteasome subunit beta type 9; Proteasome subunit beta type-9; Proteasome subunit beta-1i; proteasome-related gene 2; proteosome (prosome, macropain) subunit, beta type 9; proteosome (prosome, macropain) subunit, beta type 9 (large multifunctional peptidase 2); proteosome beta 9 subunit; Really interesting new gene 12 protein; RING12 protein
Gene Aliases: beta1i; Lmp-2; LMP2; PSMB6i; PSMB9; RING12
Molecular Function: protease