ID   PSB_RENSM               Reviewed;         279 AA.
AC   A9WSI1;
DT   10-AUG-2010, integrated into UniProtKB/Swiss-Prot.
DT   05-FEB-2008, sequence version 1.
DT   25-MAY-2022, entry version 73.
DE   RecName: Full=Proteasome subunit beta {ECO:0000255|HAMAP-Rule:MF_02113};
DE            EC=3.4.25.1 {ECO:0000255|HAMAP-Rule:MF_02113};
DE   AltName: Full=20S proteasome beta subunit {ECO:0000255|HAMAP-Rule:MF_02113};
DE   AltName: Full=Proteasome core protein PrcB {ECO:0000255|HAMAP-Rule:MF_02113};
DE   Flags: Precursor;
GN   Name=prcB {ECO:0000255|HAMAP-Rule:MF_02113};
GN   OrderedLocusNames=RSal33209_2036;
OS   Renibacterium salmoninarum (strain ATCC 33209 / DSM 20767 / JCM 11484 /
OS   NBRC 15589 / NCIMB 2235).
OC   Bacteria; Actinobacteria; Micrococcales; Micrococcaceae; Renibacterium.
OX   NCBI_TaxID=288705;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 33209 / DSM 20767 / JCM 11484 / NBRC 15589 / NCIMB 2235;
RX   PubMed=18723615; DOI=10.1128/jb.00721-08;
RA   Wiens G.D., Rockey D.D., Wu Z., Chang J., Levy R., Crane S., Chen D.S.,
RA   Capri G.R., Burnett J.R., Sudheesh P.S., Schipma M.J., Burd H.,
RA   Bhattacharyya A., Rhodes L.D., Kaul R., Strom M.S.;
RT   "Genome sequence of the fish pathogen Renibacterium salmoninarum suggests
RT   reductive evolution away from an environmental Arthrobacter ancestor.";
RL   J. Bacteriol. 190:6970-6982(2008).
CC   -!- FUNCTION: Component of the proteasome core, a large protease complex
CC       with broad specificity involved in protein degradation.
CC       {ECO:0000255|HAMAP-Rule:MF_02113}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Cleavage of peptide bonds with very broad specificity.;
CC         EC=3.4.25.1; Evidence={ECO:0000255|HAMAP-Rule:MF_02113};
CC   -!- ACTIVITY REGULATION: The formation of the proteasomal ATPase ARC-20S
CC       proteasome complex, likely via the docking of the C-termini of ARC into
CC       the intersubunit pockets in the alpha-rings, may trigger opening of the
CC       gate for substrate entry. Interconversion between the open-gate and
CC       close-gate conformations leads to a dynamic regulation of the 20S
CC       proteasome proteolysis activity. {ECO:0000255|HAMAP-Rule:MF_02113}.
CC   -!- PATHWAY: Protein degradation; proteasomal Pup-dependent pathway.
CC       {ECO:0000255|HAMAP-Rule:MF_02113}.
CC   -!- SUBUNIT: The 20S proteasome core is composed of 14 alpha and 14 beta
CC       subunits that assemble into four stacked heptameric rings, resulting in
CC       a barrel-shaped structure. The two inner rings, each composed of seven
CC       catalytic beta subunits, are sandwiched by two outer rings, each
CC       composed of seven alpha subunits. The catalytic chamber with the active
CC       sites is on the inside of the barrel. Has a gated structure, the ends
CC       of the cylinder being occluded by the N-termini of the alpha-subunits.
CC       Is capped by the proteasome-associated ATPase, ARC. {ECO:0000255|HAMAP-
CC       Rule:MF_02113}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_02113}.
CC   -!- SIMILARITY: Belongs to the peptidase T1B family. {ECO:0000255|HAMAP-
CC       Rule:MF_02113}.
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DR   EMBL; CP000910; ABY23769.1; -; Genomic_DNA.
DR   AlphaFoldDB; A9WSI1; -.
DR   SMR; A9WSI1; -.
DR   STRING; 288705.RSal33209_2036; -.
DR   MEROPS; T01.005; -.
DR   EnsemblBacteria; ABY23769; ABY23769; RSal33209_2036.
DR   KEGG; rsa:RSal33209_2036; -.
DR   eggNOG; COG0638; Bacteria.
DR   HOGENOM; CLU_035750_2_0_11; -.
DR   OMA; NLGMAMQ; -.
DR   UniPathway; UPA00997; -.
DR   Proteomes; UP000002007; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0019774; C:proteasome core complex, beta-subunit complex; IEA:UniProtKB-UniRule.
DR   GO; GO:0004298; F:threonine-type endopeptidase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019941; P:modification-dependent protein catabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0010498; P:proteasomal protein catabolic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.60.20.10; -; 1.
DR   HAMAP; MF_02113_B; Proteasome_B_B; 1.
DR   InterPro; IPR029055; Ntn_hydrolases_N.
DR   InterPro; IPR001353; Proteasome_sua/b.
DR   InterPro; IPR023333; Proteasome_suB-type.
DR   InterPro; IPR022483; PSB_actinobac.
DR   Pfam; PF00227; Proteasome; 1.
DR   SUPFAM; SSF56235; SSF56235; 1.
DR   TIGRFAMs; TIGR03690; 20S_bact_beta; 1.
DR   PROSITE; PS51476; PROTEASOME_BETA_2; 1.
PE   3: Inferred from homology;
KW   Autocatalytic cleavage; Cytoplasm; Hydrolase; Protease; Proteasome;
KW   Reference proteome; Threonine protease; Zymogen.
FT   PROPEP          1..56
FT                   /note="Removed in mature form; by autocatalysis"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
FT                   /id="PRO_0000397562"
FT   CHAIN           57..279
FT                   /note="Proteasome subunit beta"
FT                   /id="PRO_0000397563"
FT   ACT_SITE        57
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
SQ   SEQUENCE   279 AA;  29769 MW;  9833D62489B8BDE6 CRC64;
     MASQAMSWRG EGERVVRDLA AASTSSFVEH LSQSRPDLLP FGQALPAGVL PQTPHATTIV
     AMTFAGGVLM AGDRRATMGT MIASRHIEKV FPADGYSVLG IAGTAGLAID ITKLFQVELE
     HYEKIEGTPL SLEGKANRLG AMVRGNLPMA LQGLAVVPLF AGFDPALSQG RLFSYDVTGG
     RYEELEHHSV GSGSVFARGA MKKLWKPGLS ESDAVQVAVE SLFDAADDDS ATGGPDVIRK
     LWPIIYTVTR GGSRKIPQHE LGTVVEQVLV RRAELGRES