ID A0A0P9E4E5_9ARCH Unreviewed; 211 AA.
AC A0A0P9E4E5;
DT 20-JAN-2016, integrated into UniProtKB/TrEMBL.
DT 20-JAN-2016, sequence version 1.
DT 27-MAR-2024, entry version 30.
DE RecName: Full=Proteasome subunit beta {ECO:0000256|HAMAP-Rule:MF_02113};
DE EC=3.4.25.1 {ECO:0000256|HAMAP-Rule:MF_02113};
DE AltName: Full=20S proteasome beta subunit {ECO:0000256|HAMAP-Rule:MF_02113};
DE AltName: Full=Proteasome core protein PsmB {ECO:0000256|HAMAP-Rule:MF_02113};
GN Name=psmB_2 {ECO:0000313|EMBL:KPV61674.1};
GN Synonyms=psmB {ECO:0000256|HAMAP-Rule:MF_02113};
GN ORFNames=AOA66_1644 {ECO:0000313|EMBL:KPV61674.1};
OS Candidatus Bathyarchaeota archaeon BA2.
OC Archaea; Candidatus Bathyarchaeota.
OX NCBI_TaxID=1700836 {ECO:0000313|EMBL:KPV61674.1, ECO:0000313|Proteomes:UP000050284};
RN [1] {ECO:0000313|EMBL:KPV61674.1, ECO:0000313|Proteomes:UP000050284}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=BA2 {ECO:0000313|EMBL:KPV61674.1};
RX PubMed=26494757; DOI=10.1126/science.aac7745;
RA Evans P.N., Parks D.H., Chadwick G.L., Robbins S.J., Orphan V.J.,
RA Golding S.D., Tyson G.W.;
RT "Methane metabolism in the archaeal phylum Bathyarchaeota revealed by
RT genome-centric metagenomics.";
RL Science 350:434-438(2015).
CC -!- FUNCTION: Component of the proteasome core, a large protease complex
CC with broad specificity involved in protein degradation.
CC {ECO:0000256|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:0000256|ARBA:ARBA00001198,
CC ECO:0000256|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:0000256|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:0000256|HAMAP-Rule:MF_02113}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_02113}.
CC -!- SIMILARITY: Belongs to the peptidase T1B family. {ECO:0000256|HAMAP-
CC Rule:MF_02113}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:KPV61674.1}.
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DR EMBL; LIHK01000056; KPV61674.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0P9E4E5; -.
DR STRING; 1700836.AOA66_1644; -.
DR KEGG; barb:AOA66_1644; -.
DR PATRIC; fig|1700836.3.peg.719; -.
DR Proteomes; UP000050284; Unassembled WGS sequence.
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 Gene3D; 3.60.20.10; Glutamine Phosphoribosylpyrophosphate, subunit 1, domain 1; 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; IPR001353; Proteasome_sua/b.
DR InterPro; IPR023333; Proteasome_suB-type.
DR NCBIfam; TIGR03634; arc_protsome_B; 1.
DR PANTHER; PTHR32194:SF0; ATP-DEPENDENT PROTEASE SUBUNIT HSLV; 1.
DR PANTHER; PTHR32194; METALLOPROTEASE TLDD; 1.
DR Pfam; PF00227; Proteasome; 1.
DR PRINTS; PR00141; PROTEASOME.
DR SUPFAM; SSF56235; N-terminal nucleophile aminohydrolases (Ntn hydrolases); 1.
DR PROSITE; PS51476; PROTEASOME_BETA_2; 1.
PE 3: Inferred from homology;
KW Autocatalytic cleavage {ECO:0000256|ARBA:ARBA00022813, ECO:0000256|HAMAP-
KW Rule:MF_02113};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_02113};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_02113};
KW Protease {ECO:0000256|ARBA:ARBA00022670, ECO:0000256|HAMAP-Rule:MF_02113};
KW Proteasome {ECO:0000256|ARBA:ARBA00022942, ECO:0000256|HAMAP-
KW Rule:MF_02113}; Threonine protease {ECO:0000256|HAMAP-Rule:MF_02113};
KW Zymogen {ECO:0000256|ARBA:ARBA00023145, ECO:0000256|HAMAP-Rule:MF_02113}.
FT PROPEP 1..12
FT /note="Removed in mature form; by autocatalysis"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02113"
FT /id="PRO_5006502277"
FT CHAIN 13..211
FT /note="Proteasome subunit beta"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02113"
FT /id="PRO_5023338647"
FT ACT_SITE 13
FT /note="Nucleophile"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_02113,
FT ECO:0000256|PIRSR:PIRSR600243-1"
SQ SEQUENCE 211 AA; 22633 MW; 1A91CC8FEB0617B4 CRC64;
MREPIDKLAL KGTTTIGVVC KDGVILSSDT RVTMGYFVAH KKGKKIYQID DHLAMTISGT
VADAQRTVEI LKVNARLYKL NSGRPMPVQS AARLVANLLF SARLAPLITQ VLVGGVDDTG
AHVFSLDPFG SLTEEKCVAT GSGSPIAYGV LEDKYKEDAD VKDVLSVVVR AVDSAMKRDA
ASGDSFDVAV IDEKGYRELN DEEKKNILGG S
//
