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Protein

Proteasome subunit beta

Gene

psmB

Organism
Halobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1) (Halobacterium halobium)
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 sitei49 – 491NucleophileUniRule annotation

GO - Molecular functioni

  1. threonine-type endopeptidase activity Source: UniProtKB-HAMAP

GO - Biological processi

  1. proteasomal protein catabolic process Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Molecular functioni

Hydrolase, Protease, Threonine protease

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:VNG_0880G
OrganismiHalobacterium salinarum (strain ATCC 700922 / JCM 11081 / NRC-1) (Halobacterium halobium)
Taxonomic identifieri64091 [NCBI]
Taxonomic lineageiArchaeaEuryarchaeotaHalobacteriaHalobacterialesHalobacteriaceaeHalobacterium
ProteomesiUP000000554: Chromosome

Subcellular locationi

Cytoplasm UniRule annotation

GO - Cellular componenti

  1. cytoplasm Source: UniProtKB-SubCell
  2. proteasome core complex, beta-subunit complex Source: UniProtKB-HAMAP
Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Proteasome

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Propeptidei1 – 4848Removed in mature form; by autocatalysisUniRule annotationPRO_0000397298Add
BLAST
Chaini49 – 243195Proteasome subunit betaPRO_0000397299Add
BLAST

Keywords - PTMi

Autocatalytic cleavage, Zymogen

Proteomic databases

PaxDbiQ9HR36.
PRIDEiQ9HR36.

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

STRINGi64091.VNG0880G.

Structurei

3D structure databases

ProteinModelPortaliQ9HR36.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1B family.UniRule annotation

Phylogenomic databases

eggNOGiCOG0638.
InParanoidiQ9HR36.
KOiK03433.
PhylomeDBiQ9HR36.

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.

Q9HR36-1 [UniParc]FASTAAdd to Basket

« Hide

        10         20         30         40         50
MFNPNNGSEF ARNRARLDDT PNPYEPEVGS LPEGDRSQAG SDTVNKTGTT
60 70 80 90 100
IVGLTTQDGV LMASDMRASL GGRVISNKNV QKVEEIQPNA ALSISGSVGG
110 120 130 140 150
AQSFIRSLRA EANLYEARRG EYMSIDALST MASNLLRGGP FFRVVPILGG
160 170 180 190 200
VDDDGGHVFS LDPAGSSMSD TYTAQGSGMP YALGVLEQEY SEDLTMADAE
210 220 230 240
QVAAHAVKSA SERDTASGNG IHITKITHDG LTTVGHKEFD ALL
Length:243
Mass (Da):25,642
Last modified:August 10, 2010 - v2
Checksum:i605CCA765FC8C487
GO

Sequence cautioni

The sequence AAG19322.1 differs from that shown. Reason: Erroneous initiation. Translation N-terminally shortened.Curated

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE004437 Genomic DNA. Translation: AAG19322.1. Different initiation.
PIRiF84244.
RefSeqiNP_279842.1. NC_002607.1.

Genome annotation databases

EnsemblBacteriaiAAG19322; AAG19322; VNG_0880G.
GeneIDi1447627.
KEGGihal:VNG0880G.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AE004437 Genomic DNA. Translation: AAG19322.1. Different initiation.
PIRiF84244.
RefSeqiNP_279842.1. NC_002607.1.

3D structure databases

ProteinModelPortaliQ9HR36.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi64091.VNG0880G.

Proteomic databases

PaxDbiQ9HR36.
PRIDEiQ9HR36.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiAAG19322; AAG19322; VNG_0880G.
GeneIDi1447627.
KEGGihal:VNG0880G.

Phylogenomic databases

eggNOGiCOG0638.
InParanoidiQ9HR36.
KOiK03433.
PhylomeDBiQ9HR36.

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. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: ATCC 700922 / JCM 11081 / NRC-1.

Entry informationi

Entry nameiPSB_HALSA
AccessioniPrimary (citable) accession number: Q9HR36
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: August 10, 2010
Last modified: January 7, 2015
This is version 75 of the entry and version 2 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.