PSB2_THESM
ID PSB2_THESM Reviewed; 199 AA.
AC C6A3R1;
DT 10-AUG-2010, integrated into UniProtKB/Swiss-Prot.
DT 01-SEP-2009, sequence version 1.
DT 25-MAY-2022, entry version 67.
DE RecName: Full=Proteasome subunit beta 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_02113};
DE AltName: Full=Proteasome core protein PsmB 2 {ECO:0000255|HAMAP-Rule:MF_02113};
DE Flags: Precursor;
GN Name=psmB2 {ECO:0000255|HAMAP-Rule:MF_02113}; OrderedLocusNames=TSIB_1202;
OS Thermococcus sibiricus (strain DSM 12597 / MM 739).
OC Archaea; Euryarchaeota; Thermococci; Thermococcales; Thermococcaceae;
OC Thermococcus.
OX NCBI_TaxID=604354;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 12597 / MM 739;
RX PubMed=19447963; DOI=10.1128/aem.00718-09;
RA Mardanov A.V., Ravin N.V., Svetlitchnyi V.A., Beletsky A.V.,
RA Miroshnichenko M.L., Bonch-Osmolovskaya E.A., Skryabin K.G.;
RT "Metabolic versatility and indigenous origin of the archaeon Thermococcus
RT sibiricus, isolated from a siberian oil reservoir, as revealed by genome
RT analysis.";
RL Appl. Environ. Microbiol. 75:4580-4588(2009).
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 PAN-20S
CC proteasome complex, via the docking of the C-termini of PAN into the
CC intersubunit pockets in the alpha-rings, triggers opening of the gate
CC for substrate entry. Interconversion between the open-gate and close-
CC gate conformations leads to a dynamic regulation of the 20S proteasome
CC proteolysis activity. {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 at one or both ends by the proteasome regulatory ATPase, PAN.
CC {ECO:0000255|HAMAP-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; CP001463; ACS90256.1; -; Genomic_DNA.
DR RefSeq; WP_015849475.1; NC_012883.1.
DR AlphaFoldDB; C6A3R1; -.
DR SMR; C6A3R1; -.
DR STRING; 604354.TSIB_1202; -.
DR MEROPS; T01.002; -.
DR EnsemblBacteria; ACS90256; ACS90256; TSIB_1202.
DR GeneID; 8096200; -.
DR KEGG; tsi:TSIB_1202; -.
DR eggNOG; arCOG00970; Archaea.
DR HOGENOM; CLU_035750_7_2_2; -.
DR OMA; HKQAYAI; -.
DR OrthoDB; 89767at2157; -.
DR Proteomes; UP000009079; 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:0010498; P:proteasomal protein catabolic process; IEA:UniProtKB-UniRule.
DR CDD; cd03764; proteasome_beta_archeal; 1.
DR Gene3D; 3.60.20.10; -; 1.
DR HAMAP; MF_02113_A; Proteasome_B_A; 1.
DR InterPro; IPR029055; Ntn_hydrolases_N.
DR InterPro; IPR019983; Pept_T1A_Psome_bsu_arc.
DR InterPro; IPR000243; Pept_T1A_subB.
DR InterPro; IPR016050; Proteasome_bsu_CS.
DR InterPro; IPR001353; Proteasome_sua/b.
DR InterPro; IPR023333; Proteasome_suB-type.
DR Pfam; PF00227; Proteasome; 1.
DR PRINTS; PR00141; PROTEASOME.
DR SUPFAM; SSF56235; SSF56235; 1.
DR TIGRFAMs; TIGR03634; arc_protsome_B; 1.
DR PROSITE; PS00854; PROTEASOME_BETA_1; 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..6
FT /note="Removed in mature form; by autocatalysis"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
FT /id="PRO_0000397474"
FT CHAIN 7..199
FT /note="Proteasome subunit beta 2"
FT /id="PRO_0000397475"
FT ACT_SITE 7
FT /note="Nucleophile"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_02113"
SQ SEQUENCE 199 AA; 21905 MW; 55AA858618F4F97D CRC64;
MEKKTGTTTV GIKLKDGVVL AADTQASLDH MVETLNIKKI LPITDRIAIT TAGSVGDLQA
LARMLEAEAK YYQFTWGKPM TAKAMANLLS NILNESKWFP YMVQIIIGGY VEEPTLASLD
PLGGLIFDNY TTTGSGSPFA IAILEDGYKE DMSIEDAREL AIKAVRTAGK RDVYTGERKI
QVITITKEGM KEEFVEFKE