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Protein

Proteasome subunit beta

Gene

psmB

Organism
Haloquadratum walsbyi (strain DSM 16790 / HBSQ001)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-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

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei50 – 501NucleophileUniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase, Protease, Threonine protease

Enzyme and pathway databases

BioCyciHWAL362976:GJSR-1762-MONOMER.

Protein family/group databases

MEROPSiT01.002.

Names & Taxonomyi

Protein namesi
Recommended name:
Proteasome subunit betaUniRule annotation (EC:3.4.25.1UniRule annotation)
Alternative name(s):
20S proteasome beta subunitUniRule annotation
Proteasome core protein PsmBUniRule annotation
Gene namesi
Name:psmBUniRule annotation
Ordered Locus Names:HQ_2661A
OrganismiHaloquadratum walsbyi (strain DSM 16790 / HBSQ001)
Taxonomic identifieri362976 [NCBI]
Taxonomic lineageiArchaeaEuryarchaeotaHalobacteriaHaloferacalesHaloferacaceaeHaloquadratum
ProteomesiUP000001975 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Proteasome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Propeptidei1 – 4949Removed in mature form; by autocatalysisUniRule annotationPRO_0000397304Add
BLAST
Chaini50 – 243194Proteasome subunit betaPRO_0000397305Add
BLAST

Keywords - PTMi

Autocatalytic cleavage, Zymogen

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.HQ2661A.

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1B family.UniRule annotation

Phylogenomic databases

eggNOGiCOG0638.
HOGENOMiHOG000091083.
KOiK03433.
OMAiKRVTAGY.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
HAMAPiMF_02113_A. Proteasome_B_A.
InterProiIPR029055. Ntn_hydrolases_N.
IPR019983. Pept_T1A_Psome_bsu_arc.
IPR000243. Pept_T1A_subB.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamiPF00227. Proteasome. 1 hit.
[Graphical view]
PRINTSiPR00141. PROTEASOME.
SUPFAMiSSF56235. SSF56235. 1 hit.
TIGRFAMsiTIGR03634. arc_protsome_B. 1 hit.
PROSITEiPS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

Q18GX3-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MRTPMNNDIS GRPDSLNGDR SDVFSPELGE FPNADDRAND IGDMETKTGT
60 70 80 90 100
TTVGLKTQDG TVLATDMRAS LGRMVSSKDV QKVEEIHPTG ALTIAGSVSA
110 120 130 140 150
AQSLISSIRA EVRLYEARRG EDMSMEALST LLGNFLRSGG FFIVQPILGG
160 170 180 190 200
VDDDGPHIYS IDPAGSIIEE EYTVTGSGSQ YALGVLEQQY NEDLSIEEAK
210 220 230 240
TVAARSIESA VERDLASGNG INVCVVTEDG VEITQHEDFE ELV
Length:243
Mass (Da):26,023
Last modified:July 25, 2006 - v1
Checksum:i865B6717E5EEEB70
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM180088 Genomic DNA. Translation: CAJ52772.1.
RefSeqiWP_011571888.1. NC_008212.1.
YP_658378.1. NC_008212.1.

Genome annotation databases

EnsemblBacteriaiCAJ52772; CAJ52772; HQ_2661A.
GeneIDi4194516.
KEGGihwa:HQ2661A.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM180088 Genomic DNA. Translation: CAJ52772.1.
RefSeqiWP_011571888.1. NC_008212.1.
YP_658378.1. NC_008212.1.

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi362976.HQ2661A.

Protein family/group databases

MEROPSiT01.002.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAJ52772; CAJ52772; HQ_2661A.
GeneIDi4194516.
KEGGihwa:HQ2661A.

Phylogenomic databases

eggNOGiCOG0638.
HOGENOMiHOG000091083.
KOiK03433.
OMAiKRVTAGY.

Enzyme and pathway databases

BioCyciHWAL362976:GJSR-1762-MONOMER.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
HAMAPiMF_02113_A. Proteasome_B_A.
InterProiIPR029055. Ntn_hydrolases_N.
IPR019983. Pept_T1A_Psome_bsu_arc.
IPR000243. Pept_T1A_subB.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamiPF00227. Proteasome. 1 hit.
[Graphical view]
PRINTSiPR00141. PROTEASOME.
SUPFAMiSSF56235. SSF56235. 1 hit.
TIGRFAMsiTIGR03634. arc_protsome_B. 1 hit.
PROSITEiPS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "The genome of the square archaeon Haloquadratum walsbyi: life at the limits of water activity."
    Bolhuis H., Palm P., Wende A., Falb M., Rampp M., Rodriguez-Valera F., Pfeiffer F., Oesterhelt D.
    BMC Genomics 7:169-169(2006) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: DSM 16790 / HBSQ001.

Entry informationi

Entry nameiPSB_HALWD
AccessioniPrimary (citable) accession number: Q18GX3
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: July 25, 2006
Last modified: June 24, 2015
This is version 71 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Peptidase families
    Classification of peptidase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.