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Protein

Proteasome subunit alpha

Gene

psmA

Organism
Haloquadratum walsbyi (strain DSM 16790 / HBSQ001)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation.UniRule annotation

Catalytic activityi

Cleavage of peptide bonds with very broad specificity.UniRule annotation

Enzyme regulationi

The formation of the proteasomal ATPase PAN-20S proteasome complex, via the docking of the C-termini of PAN into the intersubunit pockets in the alpha-rings, triggers opening of the gate for substrate entry. Interconversion between the open-gate and close-gate conformations leads to a dynamic regulation of the 20S proteasome proteolysis activity.UniRule annotation

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionHydrolase, Protease, Threonine protease

Names & Taxonomyi

Protein namesi
Recommended name:
Proteasome subunit alphaUniRule annotation (EC:3.4.25.1UniRule annotation)
Alternative name(s):
20S proteasome alpha subunitUniRule annotation
Proteasome core protein PsmAUniRule annotation
Gene namesi
Name:psmAUniRule annotation
Ordered Locus Names:HQ_1516A
OrganismiHaloquadratum walsbyi (strain DSM 16790 / HBSQ001)
Taxonomic identifieri362976 [NCBI]
Taxonomic lineageiArchaeaEuryarchaeotaHalobacteriaHaloferacalesHaloferacaceaeHaloquadratum
Proteomesi
  • UP000001975 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm, Proteasome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_10000217851 – 250Proteasome subunit alphaAdd BLAST250

Interactioni

Subunit structurei

The 20S proteasome core is composed of 14 alpha and 14 beta subunits that assemble into four stacked heptameric rings, resulting in a barrel-shaped structure. The two inner rings, each composed of seven catalytic beta subunits, are sandwiched by two outer rings, each composed of seven alpha subunits. The catalytic chamber with the active sites is on the inside of the barrel. Has a gated structure, the ends of the cylinder being occluded by the N-termini of the alpha-subunits. Is capped at one or both ends by the proteasome regulatory ATPase, PAN.UniRule annotation

Protein-protein interaction databases

STRINGi362976.HQ1516A

Structurei

3D structure databases

ProteinModelPortaliQ18K08
SMRiQ18K08
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1A family.UniRule annotation

Phylogenomic databases

eggNOGiarCOG00971 Archaea
COG0638 LUCA
HOGENOMiHOG000091085
KOiK03432
OMAiFQVEYAR
OrthoDBiPOG093Z086S

Family and domain databases

CDDicd03756 proteasome_alpha_archeal, 1 hit
Gene3Di3.60.20.10, 1 hit
HAMAPiMF_00289_A Proteasome_A_A, 1 hit
InterProiView protein in InterPro
IPR029055 Ntn_hydrolases_N
IPR023332 Proteasome_alpha-type
IPR019982 Proteasome_asu_arc
IPR000426 Proteasome_asu_N
IPR001353 Proteasome_sua/b
PfamiView protein in Pfam
PF00227 Proteasome, 1 hit
PF10584 Proteasome_A_N, 1 hit
SMARTiView protein in SMART
SM00948 Proteasome_A_N, 1 hit
SUPFAMiSSF56235 SSF56235, 1 hit
TIGRFAMsiTIGR03633 arc_protsome_A, 1 hit
PROSITEiView protein in PROSITE
PS00388 PROTEASOME_ALPHA_1, 1 hit
PS51475 PROTEASOME_ALPHA_2, 1 hit

Sequencei

Sequence statusi: Complete.

Q18K08-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MQGQAQQQAY DRGITIFSPD GRLYQVEYAR EAVKRGTASV GIRTPDGIVL
60 70 80 90 100
AADKRSRSPL MEPTSVEKIH KTDDHVGIAS AGHVADARQL IDFARRQAQV
110 120 130 140 150
NRLRYGEPVG IETLTKNVTD NIQQYTQVGG ARPFGVALLI GGIEDGSPRL
160 170 180 190 200
YETDPSGTPY EWKAVSIGAD RSDLQEHLEE NYTEELSLDE GVGLALRTIA
210 220 230 240 250
ISNDDELTAA GVDVATVASD TEEFIELTND EISAYIADND LEPAEETDSE
Length:250
Mass (Da):27,225
Last modified:July 25, 2006 - v1
Checksum:i4BE2E087C89BC689
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM180088 Genomic DNA Translation: CAJ51644.1
RefSeqiWP_011570798.1, NC_008212.1

Genome annotation databases

EnsemblBacteriaiCAJ51644; CAJ51644; HQ_1516A
GeneIDi4194514
KEGGihwa:HQ_1516A

Similar proteinsi

Entry informationi

Entry nameiPSA_HALWD
AccessioniPrimary (citable) accession number: Q18K08
Entry historyiIntegrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: July 25, 2006
Last modified: March 28, 2018
This is version 88 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

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