PSB5_CHICK
ID PSB5_CHICK Reviewed; 256 AA.
AC P34065;
DT 01-FEB-1994, integrated into UniProtKB/Swiss-Prot.
DT 15-JUL-1998, sequence version 2.
DT 03-AUG-2022, entry version 114.
DE RecName: Full=Proteasome subunit beta type-5;
DE EC=3.4.25.1 {ECO:0000250|UniProtKB:P28074};
DE AltName: Full=Macropain chain 1;
DE AltName: Full=Multicatalytic endopeptidase complex chain 1;
DE AltName: Full=Proteasome chain 1;
DE AltName: Full=Proteasome subunit C1;
DE Flags: Precursor; Fragment;
GN Name=PSMB5;
OS Gallus gallus (Chicken).
OC Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC Archelosauria; Archosauria; Dinosauria; Saurischia; Theropoda;
OC Coelurosauria; Aves; Neognathae; Galloanserae; Galliformes; Phasianidae;
OC Phasianinae; Gallus.
OX NCBI_TaxID=9031;
RN [1]
RP NUCLEOTIDE SEQUENCE [MRNA].
RA Hirosaki Y., Sawada K., Aoyama H.;
RT "Expression of proteasome C1 gene in intercostal muscle of chick embryo.";
RL Submitted (MAR-1997) to the EMBL/GenBank/DDBJ databases.
RN [2]
RP NUCLEOTIDE SEQUENCE [MRNA] OF 53-256.
RC TISSUE=Liver;
RA Shiratsuch A., Sato S.;
RT "Primary structure of the smallest subunit of chicken liver proteasome
RT responsible for its chymotrypsin-like activity.";
RL Submitted (DEC-1990) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Component of the 20S core proteasome complex involved in the
CC proteolytic degradation of most intracellular proteins. This complex
CC plays numerous essential roles within the cell by associating with
CC different regulatory particles. Associated with two 19S regulatory
CC particles, forms the 26S proteasome and thus participates in the ATP-
CC dependent degradation of ubiquitinated proteins. The 26S proteasome
CC plays a key role in the maintenance of protein homeostasis by removing
CC misfolded or damaged proteins that could impair cellular functions, and
CC by removing proteins whose functions are no longer required. Associated
CC with the PA200 or PA28, the 20S proteasome mediates ubiquitin-
CC independent protein degradation. This type of proteolysis is required
CC in several pathways including spermatogenesis (20S-PA200 complex) or
CC generation of a subset of MHC class I-presented antigenic peptides
CC (20S-PA28 complex). Within the 20S core complex, PSMB5 displays a
CC chymotrypsin-like activity. {ECO:0000250|UniProtKB:P28074}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=Cleavage of peptide bonds with very broad specificity.;
CC EC=3.4.25.1; Evidence={ECO:0000250|UniProtKB:P28074};
CC -!- SUBUNIT: The 26S proteasome consists of a 20S proteasome core and two
CC 19S regulatory subunits. The 20S proteasome core is a barrel-shaped
CC complex made of 28 subunits that are arranged in four stacked rings.
CC The two outer rings are each formed by seven alpha subunits, and the
CC two inner rings are formed by seven beta subunits. The proteolytic
CC activity is exerted by three beta-subunits PSMB5, PSMB6 and PSMB7.
CC Directly interacts with POMP. Interacts with ABCB1 and TAP1.
CC {ECO:0000250|UniProtKB:P28074}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000250|UniProtKB:P28074}. Nucleus
CC {ECO:0000250|UniProtKB:P28074}.
CC -!- SIMILARITY: Belongs to the peptidase T1B family. {ECO:0000255|PROSITE-
CC ProRule:PRU00809}.
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DR EMBL; AB001935; BAA19471.1; -; mRNA.
DR EMBL; X57210; CAA40494.1; -; mRNA.
DR PIR; S30539; S30539.
DR RefSeq; NP_001264655.1; NM_001277726.1.
DR AlphaFoldDB; P34065; -.
DR SMR; P34065; -.
DR MEROPS; T01.012; -.
DR GeneID; 396003; -.
DR CTD; 5693; -.
DR VEuPathDB; HostDB:geneid_396003; -.
DR InParanoid; P34065; -.
DR OrthoDB; 929961at2759; -.
DR PhylomeDB; P34065; -.
DR Proteomes; UP000000539; Unplaced.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005634; C:nucleus; IBA:GO_Central.
DR GO; GO:0005839; C:proteasome core complex; IBA:GO_Central.
DR GO; GO:0019774; C:proteasome core complex, beta-subunit complex; ISS:UniProtKB.
DR GO; GO:0004175; F:endopeptidase activity; IBA:GO_Central.
DR GO; GO:0004298; F:threonine-type endopeptidase activity; IEA:UniProtKB-KW.
DR GO; GO:0010498; P:proteasomal protein catabolic process; IBA:GO_Central.
DR GO; GO:0043161; P:proteasome-mediated ubiquitin-dependent protein catabolic process; IEA:InterPro.
DR Gene3D; 3.60.20.10; -; 1.
DR InterPro; IPR029055; Ntn_hydrolases_N.
DR InterPro; IPR000243; Pept_T1A_subB.
DR InterPro; IPR037558; Proteasome_beta_5.
DR InterPro; IPR016050; Proteasome_bsu_CS.
DR InterPro; IPR001353; Proteasome_sua/b.
DR InterPro; IPR023333; Proteasome_suB-type.
DR PANTHER; PTHR11599:SF51; PTHR11599:SF51; 1.
DR Pfam; PF00227; Proteasome; 1.
DR PRINTS; PR00141; PROTEASOME.
DR SUPFAM; SSF56235; SSF56235; 1.
DR PROSITE; PS00854; PROTEASOME_BETA_1; 1.
DR PROSITE; PS51476; PROTEASOME_BETA_2; 1.
PE 2: Evidence at transcript level;
KW Cytoplasm; Hydrolase; Nucleus; Protease; Proteasome; Reference proteome;
KW Threonine protease; Zymogen.
FT PROPEP <1..55
FT /note="Removed in mature form"
FT /evidence="ECO:0000250"
FT /id="PRO_0000026603"
FT CHAIN 56..256
FT /note="Proteasome subunit beta type-5"
FT /id="PRO_0000026604"
FT ACT_SITE 56
FT /note="Nucleophile"
FT /evidence="ECO:0000250|UniProtKB:P28074"
FT NON_TER 1
SQ SEQUENCE 256 AA; 27045 MW; ED467B1C925D5186 CRC64;
CNMALADIVR LPPASEAPFA PLGAPRDLSG PPSKLAVRPW GGADLPGPGL QLLHGTTTLA
FKFAHGVVVA VDSRATAGSY IASQTVQKVI EINPSLLGTM AGGAADCSFW ERLLARQCRV
YELRNKEPIS VAAASKLLAN MVYQYKGMGL SMGTMICGWD KRGPGLYYVD SEGTRIPGEA
FAVGSGSSYA YGVLDGGRRP DMATDEALEL ARRAIFQAAR RDAYSGGSVT VYHVGPRGWR
RVSSHDVAGL HDGYGG
