ID PSA_METJA Reviewed; 261 AA. AC Q60177; DT 01-NOV-1997, integrated into UniProtKB/Swiss-Prot. DT 01-NOV-1997, sequence version 1. DT 21-SEP-2011, entry version 81. DE RecName: Full=Proteasome subunit alpha; DE EC=3.4.25.1; DE AltName: Full=20S proteasome alpha subunit; DE AltName: Full=Proteasome core protein PsmA; GN Name=psmA; OrderedLocusNames=MJ0591; OS Methanocaldococcus jannaschii (strain ATCC 43067 / DSM 2661 / JAL-1 / OS JCM 10045 / NBRC 100440) (Methanococcus jannaschii). OC Archaea; Euryarchaeota; Methanococci; Methanococcales; OC Methanocaldococcaceae; Methanocaldococcus. OX NCBI_TaxID=243232; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC 43067 / DSM 2661 / JAL-1 / JCM 10045 / NBRC 100440; RX MEDLINE=96337999; PubMed=8688087; DOI=10.1126/science.273.5278.1058; RA Bult C.J., White O., Olsen G.J., Zhou L., Fleischmann R.D., RA Sutton G.G., Blake J.A., FitzGerald L.M., Clayton R.A., Gocayne J.D., RA Kerlavage A.R., Dougherty B.A., Tomb J.-F., Adams M.D., Reich C.I., RA Overbeek R., Kirkness E.F., Weinstock K.G., Merrick J.M., Glodek A., RA Scott J.L., Geoghagen N.S.M., Weidman J.F., Fuhrmann J.L., Nguyen D., RA Utterback T.R., Kelley J.M., Peterson J.D., Sadow P.W., Hanna M.C., RA Cotton M.D., Roberts K.M., Hurst M.A., Kaine B.P., Borodovsky M., RA Klenk H.-P., Fraser C.M., Smith H.O., Woese C.R., Venter J.C.; RT "Complete genome sequence of the methanogenic archaeon, Methanococcus RT jannaschii."; RL Science 273:1058-1073(1996). RN [2] RP FUNCTION, CATALYTIC ACTIVITY, SUBUNIT, AND INTERACTION WITH PAN. RX MEDLINE=20158885; PubMed=10692374; RX DOI=10.1128/JB.182.6.1680-1692.2000; RA Wilson H.L., Ou M.S., Aldrich H.C., Maupin-Furlow J.; RT "Biochemical and physical properties of the Methanococcus jannaschii RT 20S proteasome and PAN, a homolog of the ATPase (Rpt) subunits of the RT eucaryal 26S proteasome."; RL J. Bacteriol. 182:1680-1692(2000). RN [3] RP X-RAY CRYSTALLOGRAPHY (4.1 ANGSTROMS) IN COMPLEX WITH BETA SUBUNIT, RP GATED STRUCTURE, AND SUBUNIT. RX PubMed=19481527; DOI=10.1016/j.molcel.2009.04.021; RA Zhang F., Hu M., Tian G., Zhang P., Finley D., Jeffrey P.D., Shi Y.; RT "Structural insights into the regulatory particle of the proteasome RT from Methanocaldococcus jannaschii."; RL Mol. Cell 34:473-484(2009). CC -!- FUNCTION: Component of the proteasome core, a large protease CC complex with broad specificity involved in protein degradation. CC The M.jannaschii proteasome is able to cleave oligopeptides after CC Glu, Asp, Tyr, Phe, Trp, slightly after Arg, but not after Ala. CC Thus, displays caspase-like and chymotrypsin-like activities and CC low level of trypsin-like activity. CC -!- CATALYTIC ACTIVITY: Cleavage of peptide bonds with very broad CC specificity. CC -!- ENZYME REGULATION: The formation of the proteasomal ATPase PAN-20S CC proteasome complex, via the docking of the C-termini of PAN into CC the intersubunit pockets in the alpha-rings, triggers opening of CC the gate for substrate entry. Interconversion between the open- CC gate and close-gate conformations leads to a dynamic regulation of CC the 20S proteasome proteolysis activity (By similarity). CC -!- SUBUNIT: The 20S proteasome core is composed of 14 alpha and 14 CC beta subunits that assemble into four stacked heptameric rings, CC resulting in a barrel-shaped structure. The two inner rings, each CC composed of seven catalytic beta subunits, are sandwiched by two CC outer rings, each composed of seven alpha subunits. The catalytic CC chamber with the active sites is on the inside of the barrel. Has CC a gated structure, the ends of the cylinder being occluded by the CC N-termini of the alpha-subunits. Is capped at one or both ends by CC the proteasome regulatory ATPase, PAN. CC -!- SUBCELLULAR LOCATION: Cytoplasm (By similarity). CC -!- SIMILARITY: Belongs to the peptidase T1A family. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; L77117; AAB98581.1; -; Genomic_DNA. DR PIR; G64373; G64373. DR RefSeq; NP_247571.1; NC_000909.1. DR PDB; 3H4P; X-ray; 4.10 A; A/B/C/D/E/F/G/H/I/J/K/L/M/N=1-261. DR PDBsum; 3H4P; -. DR ProteinModelPortal; Q60177; -. DR SMR; Q60177; 5-247. DR GeneID; 1451456; -. DR GenomeReviews; L77117_GR; MJ0591. DR KEGG; mja:MJ_0591; -. DR NMPDR; fig|243232.1.peg.608; -. DR TIGR; MJ0591; -. DR HOGENOM; HBG499923; -. DR OMA; FQVEYAR; -. DR ProtClustDB; PRK03996; -. DR BioCyc; MJAN243232:MJ_0591-MON; -. DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell. DR GO; GO:0019773; C:proteasome core complex, alpha-subunit complex; IDA:UniProtKB. DR GO; GO:0004298; F:threonine-type endopeptidase activity; IEA:UniProtKB-KW. DR GO; GO:0010498; P:proteasomal protein catabolic process; IDA:UniProtKB. DR GO; GO:0006511; P:ubiquitin-dependent protein catabolic process; IEA:InterPro. DR HAMAP; MF_00289_A; Proteasome_A_A; 1; -. DR InterPro; IPR019982; Proteasome_asu_arc. DR InterPro; IPR000426; Proteasome_asu_CS. DR InterPro; IPR023332; Proteasome_suA-type. 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 TIGRFAMs; TIGR03633; Arc_protsome_A; 1. DR PROSITE; PS00388; PROTEASOME_A_1; 1. DR PROSITE; PS51475; PROTEASOME_A_2; 1. PE 1: Evidence at protein level; KW 3D-structure; Complete proteome; Cytoplasm; Hydrolase; Protease; KW Proteasome; Reference proteome; Threonine protease. FT CHAIN 1 261 Proteasome subunit alpha. FT /FTId=PRO_0000124174. FT HELIX 23 33 FT STRAND 48 52 FT TURN 62 64 FT STRAND 68 72 FT STRAND 75 80 FT HELIX 84 90 FT HELIX 93 102 FT HELIX 110 123 FT STRAND 136 140 FT STRAND 149 152 FT STRAND 159 163 FT TURN 171 176 FT HELIX 177 180 FT HELIX 192 201 FT STRAND 202 204 FT STRAND 209 216 FT TURN 217 220 FT STRAND 221 224 FT TURN 227 230 FT HELIX 231 233 FT TURN 234 239 FT STRAND 240 242 SQ SEQUENCE 261 AA; 29321 MW; 93FC7DF277E01AD8 CRC64; MQMVPPSAYD RAITVFSPEG RLYQVEYARE AVRRGTTAIG IACKDGVVLA VDRRITSKLV KIRSIEKIFQ IDDHVAAATS GLVADARVLI DRARLEAQIY RLTYGEEISI EMLAKKICDI KQAYTQHGGV RPFGVSLLIA GIDKNEARLF ETDPSGALIE YKATAIGSGR PVVMELLEKE YRDDITLDEG LELAITALTK ANEDIKPENV DVCIITVKDA QFKKIPVEEI KKLIEKVKKK LNEENKKEEE NREETKEKQE E //