PSA_NATPD
ID PSA_NATPD Reviewed; 255 AA.
AC Q3IPJ1;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 08-NOV-2005, sequence version 1.
DT 25-MAY-2022, entry version 104.
DE RecName: Full=Proteasome subunit alpha {ECO:0000255|HAMAP-Rule:MF_00289};
DE AltName: Full=20S proteasome alpha subunit {ECO:0000255|HAMAP-Rule:MF_00289};
DE AltName: Full=Proteasome core protein PsmA {ECO:0000255|HAMAP-Rule:MF_00289};
GN Name=psmA {ECO:0000255|HAMAP-Rule:MF_00289}; OrderedLocusNames=NP_3738A;
OS Natronomonas pharaonis (strain ATCC 35678 / DSM 2160 / CIP 103997 / JCM
OS 8858 / NBRC 14720 / NCIMB 2260 / Gabara) (Halobacterium pharaonis).
OC Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Halobacteriales;
OC Haloarculaceae; Natronomonas.
OX NCBI_TaxID=348780;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 35678 / DSM 2160 / CIP 103997 / JCM 8858 / NBRC 14720 / NCIMB
RC 2260 / Gabara;
RX PubMed=16169924; DOI=10.1101/gr.3952905;
RA Falb M., Pfeiffer F., Palm P., Rodewald K., Hickmann V., Tittor J.,
RA Oesterhelt D.;
RT "Living with two extremes: conclusions from the genome sequence of
RT Natronomonas pharaonis.";
RL Genome Res. 15:1336-1343(2005).
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_00289}.
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_00289}.
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_00289}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00289}.
CC -!- SIMILARITY: Belongs to the peptidase T1A family. {ECO:0000255|HAMAP-
CC Rule:MF_00289}.
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DR EMBL; CR936257; CAI49960.1; -; Genomic_DNA.
DR RefSeq; WP_011323577.1; NC_007426.1.
DR AlphaFoldDB; Q3IPJ1; -.
DR SMR; Q3IPJ1; -.
DR STRING; 348780.NP_3738A; -.
DR EnsemblBacteria; CAI49960; CAI49960; NP_3738A.
DR GeneID; 3703061; -.
DR KEGG; nph:NP_3738A; -.
DR eggNOG; arCOG00971; Archaea.
DR HOGENOM; CLU_035750_4_1_2; -.
DR OMA; FQVEYAR; -.
DR OrthoDB; 57654at2157; -.
DR Proteomes; UP000002698; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0019773; C:proteasome core complex, alpha-subunit complex; ISS:UniProtKB.
DR GO; GO:0004298; F:threonine-type endopeptidase activity; IEA:InterPro.
DR GO; GO:0010498; P:proteasomal protein catabolic process; IEA:UniProtKB-UniRule.
DR GO; GO:0006511; P:ubiquitin-dependent protein catabolic process; IEA:InterPro.
DR CDD; cd03756; proteasome_alpha_archeal; 1.
DR Gene3D; 3.60.20.10; -; 1.
DR HAMAP; MF_00289_A; Proteasome_A_A; 1.
DR InterPro; IPR029055; Ntn_hydrolases_N.
DR InterPro; IPR023332; Proteasome_alpha-type.
DR InterPro; IPR019982; Proteasome_asu_arc.
DR InterPro; IPR000426; Proteasome_asu_N.
DR InterPro; IPR001353; Proteasome_sua/b.
DR Pfam; PF00227; Proteasome; 1.
DR Pfam; PF10584; Proteasome_A_N; 1.
DR SMART; SM00948; Proteasome_A_N; 1.
DR SUPFAM; SSF56235; SSF56235; 1.
DR TIGRFAMs; TIGR03633; arc_protsome_A; 1.
DR PROSITE; PS00388; PROTEASOME_ALPHA_1; 1.
DR PROSITE; PS51475; PROTEASOME_ALPHA_2; 1.
PE 3: Inferred from homology;
KW Cytoplasm; Proteasome; Reference proteome.
FT CHAIN 1..255
FT /note="Proteasome subunit alpha"
FT /id="PRO_1000021793"
SQ SEQUENCE 255 AA; 28002 MW; E4FABF1D191E294C CRC64;
MQGQSQQQAY DRGITIFSPD GRLYQVEYAR EAVKRGTASI GIRTEDGVVL VVDKRIRSPL
MERTSVEKIH KADDHIGIAS AGHVADARQL IDFARRQAQV NQLRYDEPIG VETLTKAVTD
HIQQYTQVGG ARPFGVALII GGIEDGEPRL YETDPSGTPY EWQALAVGAD RGDIQEYLEE
HYSESLDTEA GIGLALEALA SVNDDSLTPE GIGLATVTVD DDDGFSQLSD EEIEAHLEER
DLLEAEDDAD EDDEE