ID   PSA_ACTMD               Reviewed;         263 AA.
AC   C6WID9;
DT   10-AUG-2010, integrated into UniProtKB/Swiss-Prot.
DT   22-SEP-2009, sequence version 1.
DT   25-MAY-2022, entry version 69.
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 PrcA {ECO:0000255|HAMAP-Rule:MF_00289};
GN   Name=prcA {ECO:0000255|HAMAP-Rule:MF_00289}; OrderedLocusNames=Amir_2242;
OS   Actinosynnema mirum (strain ATCC 29888 / DSM 43827 / JCM 3225 / NBRC 14064
OS   / NCIMB 13271 / NRRL B-12336 / IMRU 3971 / 101).
OC   Bacteria; Actinobacteria; Pseudonocardiales; Pseudonocardiaceae;
OC   Actinosynnema.
OX   NCBI_TaxID=446462;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29888 / DSM 43827 / JCM 3225 / NBRC 14064 / NCIMB 13271 / NRRL
RC   B-12336 / IMRU 3971 / 101;
RX   PubMed=21304636; DOI=10.4056/sigs.21137;
RA   Land M., Lapidus A., Mayilraj S., Chen F., Copeland A., Del Rio T.G.,
RA   Nolan M., Lucas S., Tice H., Cheng J.F., Chertkov O., Bruce D., Goodwin L.,
RA   Pitluck S., Rohde M., Goker M., Pati A., Ivanova N., Mavromatis K.,
RA   Chen A., Palaniappan K., Hauser L., Chang Y.J., Jeffries C.C., Brettin T.,
RA   Detter J.C., Han C., Chain P., Tindall B.J., Bristow J., Eisen J.A.,
RA   Markowitz V., Hugenholtz P., Kyrpides N.C., Klenk H.P.;
RT   "Complete genome sequence of Actinosynnema mirum type strain (101).";
RL   Stand. Genomic Sci. 1:46-53(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_00289}.
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_00289}.
CC   -!- PATHWAY: Protein degradation; proteasomal Pup-dependent pathway.
CC       {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 by the proteasome-associated ATPase, ARC. {ECO:0000255|HAMAP-
CC       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; CP001630; ACU36182.1; -; Genomic_DNA.
DR   RefSeq; WP_015801071.1; NC_013093.1.
DR   AlphaFoldDB; C6WID9; -.
DR   SMR; C6WID9; -.
DR   STRING; 446462.Amir_2242; -.
DR   EnsemblBacteria; ACU36182; ACU36182; Amir_2242.
DR   KEGG; ami:Amir_2242; -.
DR   eggNOG; COG0638; Bacteria.
DR   HOGENOM; CLU_071031_0_0_11; -.
DR   OMA; QIYRLPH; -.
DR   OrthoDB; 1243753at2; -.
DR   UniPathway; UPA00997; -.
DR   Proteomes; UP000002213; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0019773; C:proteasome core complex, alpha-subunit complex; IEA:UniProtKB-UniRule.
DR   GO; GO:0004298; F:threonine-type endopeptidase activity; IEA:InterPro.
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_00289_B; Proteasome_A_B; 1.
DR   InterPro; IPR029055; Ntn_hydrolases_N.
DR   InterPro; IPR023332; Proteasome_alpha-type.
DR   InterPro; IPR022296; Proteasome_asu_bac.
DR   InterPro; IPR001353; Proteasome_sua/b.
DR   PANTHER; PTHR11599:SF69; PTHR11599:SF69; 1.
DR   Pfam; PF00227; Proteasome; 1.
DR   SUPFAM; SSF56235; SSF56235; 1.
DR   TIGRFAMs; TIGR03691; 20S_bact_alpha; 1.
DR   PROSITE; PS51475; PROTEASOME_ALPHA_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Proteasome; Reference proteome.
FT   CHAIN           1..263
FT                   /note="Proteasome subunit alpha"
FT                   /id="PRO_0000397132"
FT   REGION          229..263
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
SQ   SEQUENCE   263 AA;  28517 MW;  795756CC6D3A7A50 CRC64;
     MTMPLYASPE QILRDRSEYA RKGISRGRSV VVLRYADGVL FVAENPSSTL HKVSEIYDRI
     GFAAVGRYSE FENLRQAGIR FADVRGYQND PRDVTGRSLA NVYAQTLGSI FTEQIKPLEV
     EICVAEVGHT PEHDTLYRLT YDGSIVEEPQ HSVMGGQAET TATALKESYE EGLPLAAALR
     VAVKALSAGS ASTGNGKPEL LEAANLEAAV LERDRPRRAF RRLKGTALAA LLQDTPPDDA
     DADADAGKKP ANDGNLPPND DKS