ID   PSB_GORB4               Reviewed;         292 AA.
AC   D0LDT1;
DT   10-AUG-2010, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2009, sequence version 1.
DT   25-MAY-2022, entry version 59.
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}; OrderedLocusNames=Gbro_2463;
OS   Gordonia bronchialis (strain ATCC 25592 / DSM 43247 / BCRC 13721 / JCM 3198
OS   / KCTC 3076 / NBRC 16047 / NCTC 10667) (Rhodococcus bronchialis).
OC   Bacteria; Actinobacteria; Corynebacteriales; Gordoniaceae; Gordonia.
OX   NCBI_TaxID=526226;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 25592 / DSM 43247 / BCRC 13721 / JCM 3198 / KCTC 3076 / NBRC
RC   16047 / NCTC 10667;
RG   US DOE Joint Genome Institute (JGI-PGF);
RA   Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Kyrpides N., Mavromatis K., Ivanova N.,
RA   Ovchinnikova G., Saunders E., Brettin T., Detter J.C., Han C., Larimer F.,
RA   Land M., Hauser L., Markowitz V., Cheng J.-F., Hugenholtz P., Woyke T.,
RA   Wu D., Jando M., Schneider S., Goeker M., Klenk H.-P., Eisen J.A.;
RT   "The complete chromosome of Gordonia bronchialis DSM 43247.";
RL   Submitted (OCT-2009) to the EMBL/GenBank/DDBJ databases.
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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP001802; ACY21704.1; -; Genomic_DNA.
DR   RefSeq; WP_012834259.1; NC_013441.1.
DR   AlphaFoldDB; D0LDT1; -.
DR   SMR; D0LDT1; -.
DR   STRING; 526226.Gbro_2463; -.
DR   EnsemblBacteria; ACY21704; ACY21704; Gbro_2463.
DR   KEGG; gbr:Gbro_2463; -.
DR   eggNOG; COG0638; Bacteria.
DR   HOGENOM; CLU_035750_2_0_11; -.
DR   OMA; NLGMAMQ; -.
DR   UniPathway; UPA00997; -.
DR   Proteomes; UP000001219; 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..62
FT                   /note="Removed in mature form; by autocatalysis"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
FT                   /id="PRO_0000397512"
FT   CHAIN           63..292
FT                   /note="Proteasome subunit beta"
FT                   /id="PRO_0000397513"
FT   ACT_SITE        63
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
SQ   SEQUENCE   292 AA;  30578 MW;  BC8FA8DC46C6E6A7 CRC64;
     MSESLGSVPG SLRSGVISPG LSLGADISSF TEYLRAHAPD QLPQARAEAM GLHRAADDIP
     HGTTIVAVSY PGGVILAGDR RATMGNLIAT RDVKKVYITD EYSAAGIAGT AGIAIEMVRL
     FAVELEHYEK LEGVPLTLDG KVSRLASMVR GNLGAALQGL AAVPLLVGYD IDHDDPTERG
     RIFSFDVAGD RHEEFGGYQA IGSGSVFAKS SLKKLYRHDL DEASALAIAV EALYDAADDD
     SATGGPDIVR KIFPLAAVVD AGGAREVDAE SIEAAARAIV ERRAAEHEGG PR