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C6A3R1 (PSB2_THESM) Reviewed, UniProtKB/Swiss-Prot

Last modified June 11, 2014. Version 29. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (2) | Third-party data text xml rdf/xml gff fasta
to top of pageNames·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order

Names and origin

Protein namesRecommended name:
Proteasome subunit beta 2

EC=3.4.25.1
Alternative name(s):
20S proteasome beta subunit 2
Proteasome core protein PsmB 2
Gene names
Name:psmB2
Ordered Locus Names:TSIB_1202
OrganismThermococcus sibiricus (strain MM 739 / DSM 12597) [Complete proteome] [HAMAP]
Taxonomic identifier604354 [NCBI]
Taxonomic lineageArchaeaEuryarchaeotaThermococciThermococcalesThermococcaceaeThermococcus

Protein attributes

Sequence length199 AA.
Sequence statusComplete.
Sequence processingThe displayed sequence is further processed into a mature form.
Protein existenceInferred from homology

General annotation (Comments)

Function

Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation By similarity. HAMAP-Rule MF_02113

Catalytic activity

Cleavage of peptide bonds with very broad specificity. HAMAP-Rule MF_02113

Enzyme regulation

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 By similarity. HAMAP-Rule MF_02113

Subunit structure

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 By similarity.

Subcellular location

Cytoplasm By similarity HAMAP-Rule MF_02113.

Sequence similarities

Belongs to the peptidase T1B family.

Ontologies

Keywords
   Cellular componentCytoplasm
Proteasome
   Molecular functionHydrolase
Protease
Threonine protease
   PTMAutocatalytic cleavage
Zymogen
   Technical termComplete proteome
Gene Ontology (GO)
   Biological_processproteasomal protein catabolic process

Inferred from electronic annotation. Source: UniProtKB-HAMAP

   Cellular_componentcytoplasm

Inferred from electronic annotation. Source: UniProtKB-SubCell

proteasome core complex, beta-subunit complex

Inferred from electronic annotation. Source: UniProtKB-HAMAP

   Molecular_functionthreonine-type endopeptidase activity

Inferred from electronic annotation. Source: UniProtKB-HAMAP

Complete GO annotation...

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Propeptide1 – 66Removed in mature form; by autocatalysis By similarity
PRO_0000397474
Chain7 – 199193Proteasome subunit beta 2 HAMAP-Rule MF_02113
PRO_0000397475

Sites

Active site71Nucleophile By similarity

Sequences

Sequence LengthMass (Da)Tools
C6A3R1 [UniParc].

Last modified September 1, 2009. Version 1.
Checksum: 55AA858618F4F97D

FASTA19921,905
        10         20         30         40         50         60 
MEKKTGTTTV GIKLKDGVVL AADTQASLDH MVETLNIKKI LPITDRIAIT TAGSVGDLQA 

        70         80         90        100        110        120 
LARMLEAEAK YYQFTWGKPM TAKAMANLLS NILNESKWFP YMVQIIIGGY VEEPTLASLD 

       130        140        150        160        170        180 
PLGGLIFDNY TTTGSGSPFA IAILEDGYKE DMSIEDAREL AIKAVRTAGK RDVYTGERKI 

       190 
QVITITKEGM KEEFVEFKE 

« Hide

References

[1]"Metabolic versatility and indigenous origin of the archaeon Thermococcus sibiricus, isolated from a siberian oil reservoir, as revealed by genome analysis."
Mardanov A.V., Ravin N.V., Svetlitchnyi V.A., Beletsky A.V., Miroshnichenko M.L., Bonch-Osmolovskaya E.A., Skryabin K.G.
Appl. Environ. Microbiol. 75:4580-4588(2009) [PubMed] [Europe PMC] [Abstract]
Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
Strain: MM 739 / DSM 12597.

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
CP001463 Genomic DNA. Translation: ACS90256.1.
RefSeqYP_002994605.1. NC_012883.1.

3D structure databases

ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING604354.TSIB_1202.

Protein family/group databases

MEROPST01.002.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaACS90256; ACS90256; TSIB_1202.
GeneID8096200.
KEGGtsi:TSIB_1202.

Organism-specific databases

CMRSearch...

Phylogenomic databases

eggNOGCOG0638.
HOGENOMHOG000091083.
KOK03433.
OMAWFPYLVQ.

Enzyme and pathway databases

BioCycTSIB604354:GHMS-1233-MONOMER.

Family and domain databases

Gene3D3.60.20.10. 1 hit.
HAMAPMF_02113_A. Proteasome_B_A.
InterProIPR029055. Ntn_hydrolases_N.
IPR019983. Pept_T1A_Psome_bsu_arc.
IPR000243. Pept_T1A_subB.
IPR016050. Proteasome_bsu_CS.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamPF00227. Proteasome. 1 hit.
[Graphical view]
PRINTSPR00141. PROTEASOME.
SUPFAMSSF56235. SSF56235. 1 hit.
TIGRFAMsTIGR03634. arc_protsome_B. 1 hit.
PROSITEPS00854. PROTEASOME_BETA_1. 1 hit.
PS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSB2_THESM
AccessionPrimary (citable) accession number: C6A3R1
Entry history
Integrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: September 1, 2009
Last modified: June 11, 2014
This is version 29 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families

Peptidase families

Classification of peptidase families and list of entries