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Protein

Proteasome subunit beta 2

Gene

prcB2

Organism
Streptomyces avermitilis (strain ATCC 31267 / DSM 46492 / JCM 5070 / NCIMB 12804 / NRRL 8165 / MA-4680)
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 ARC-20S proteasome complex, likely via the docking of the C-termini of ARC into the intersubunit pockets in the alpha-rings, may trigger 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

Pathwayi

Sites

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Active sitei54 – 541NucleophileUniRule annotation

GO - Molecular functioni

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

GO - Biological processi

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

Keywords - Molecular functioni

Hydrolase, Protease, Threonine protease

Enzyme and pathway databases

BioCyciSAVE227882:GJU1-6767-MONOMER.
UniPathwayiUPA00997.

Protein family/group databases

MEROPSiT01.005.

Names & Taxonomyi

Protein namesi
Recommended name:
Proteasome subunit beta 2UniRule annotation (EC:3.4.25.1UniRule annotation)
Alternative name(s):
20S proteasome beta subunit 2UniRule annotation
Proteasome core protein PrcB 2UniRule annotation
Gene namesi
Name:prcB2UniRule annotation
Synonyms:prcB1
Ordered Locus Names:SAV_6681
OrganismiStreptomyces avermitilis (strain ATCC 31267 / DSM 46492 / JCM 5070 / NCIMB 12804 / NRRL 8165 / MA-4680)
Taxonomic identifieri227882 [NCBI]
Taxonomic lineageiBacteriaActinobacteriaActinobacteridaeActinomycetalesStreptomycineaeStreptomycetaceaeStreptomyces
ProteomesiUP000000428: 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 – 5353Removed in mature form; by autocatalysisUniRule annotationPRO_0000397584Add
BLAST
Chaini54 – 281228Proteasome subunit beta 2PRO_0000397585Add
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 by the proteasome-associated ATPase, ARC.UniRule annotation

Protein-protein interaction databases

STRINGi227882.SAV_6681.

Structurei

3D structure databases

ProteinModelPortaliQ828I8.
SMRiQ828I8. Positions 54-272.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1B family.UniRule annotation

Phylogenomic databases

eggNOGiCOG0638.
HOGENOMiHOG000245308.
KOiK03433.
OMAiFQVELEH.
OrthoDBiEOG6XM79W.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
HAMAPiMF_02113_B. Proteasome_B_B.
InterProiIPR029055. Ntn_hydrolases_N.
IPR022483. Pept_T1A_Psome_suB_actinobac.
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.
TIGRFAMsiTIGR03690. 20S_bact_beta. 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.

Q828I8-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MEANTRSTGR LPAAFLTPGS SSFMDFLSEH QPEILPGNRQ LPPTQGVIEA
60 70 80 90 100
PHGTTIVATT FPGGVVLAGD RRATMGNVIA QRDIEKVFPA DEYSAVGIAG
110 120 130 140 150
TAGLAVEMVK LFQLELEHFE KVEGATLSLE GKANRLSTMI RSNLAMAMQG
160 170 180 190 200
LAVVPLFAGY DVDREKGRIF SYDVTGGRSE EHGYASTGSG SIFARGAMKK
210 220 230 240 250
LYRDDLTEQQ ATTLVIQALY DAADDDSATG GPDVARRIYP IVTVITEDGF
260 270 280
RRLTDEESSE IARAILERRL EQPDGPRAAL L
Length:281
Mass (Da):30,292
Last modified:June 1, 2003 - v1
Checksum:i9503B362CB551433
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000030 Genomic DNA. Translation: BAC74392.1.
RefSeqiNP_827857.1. NC_003155.4.
WP_010988081.1. NZ_BAVY01000016.1.

Genome annotation databases

EnsemblBacteriaiBAC74392; BAC74392; SAV_6681.
GeneIDi1211534.
KEGGisma:SAV_6681.
PATRICi23727472. VBIStrAve112782_7084.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BA000030 Genomic DNA. Translation: BAC74392.1.
RefSeqiNP_827857.1. NC_003155.4.
WP_010988081.1. NZ_BAVY01000016.1.

3D structure databases

ProteinModelPortaliQ828I8.
SMRiQ828I8. Positions 54-272.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi227882.SAV_6681.

Protein family/group databases

MEROPSiT01.005.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiBAC74392; BAC74392; SAV_6681.
GeneIDi1211534.
KEGGisma:SAV_6681.
PATRICi23727472. VBIStrAve112782_7084.

Phylogenomic databases

eggNOGiCOG0638.
HOGENOMiHOG000245308.
KOiK03433.
OMAiFQVELEH.
OrthoDBiEOG6XM79W.

Enzyme and pathway databases

UniPathwayiUPA00997.
BioCyciSAVE227882:GJU1-6767-MONOMER.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
HAMAPiMF_02113_B. Proteasome_B_B.
InterProiIPR029055. Ntn_hydrolases_N.
IPR022483. Pept_T1A_Psome_suB_actinobac.
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.
TIGRFAMsiTIGR03690. 20S_bact_beta. 1 hit.
PROSITEiPS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Publicationsi

  1. "Genome sequence of an industrial microorganism Streptomyces avermitilis: deducing the ability of producing secondary metabolites."
    Omura S., Ikeda H., Ishikawa J., Hanamoto A., Takahashi C., Shinose M., Takahashi Y., Horikawa H., Nakazawa H., Osonoe T., Kikuchi H., Shiba T., Sakaki Y., Hattori M.
    Proc. Natl. Acad. Sci. U.S.A. 98:12215-12220(2001) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: ATCC 31267 / DSM 46492 / JCM 5070 / NCIMB 12804 / NRRL 8165 / MA-4680.
  2. "Complete genome sequence and comparative analysis of the industrial microorganism Streptomyces avermitilis."
    Ikeda H., Ishikawa J., Hanamoto A., Shinose M., Kikuchi H., Shiba T., Sakaki Y., Hattori M., Omura S.
    Nat. Biotechnol. 21:526-531(2003) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: ATCC 31267 / DSM 46492 / JCM 5070 / NCIMB 12804 / NRRL 8165 / MA-4680.

Entry informationi

Entry nameiPSB2_STRAW
AccessioniPrimary (citable) accession number: Q828I8
Entry historyi
Integrated into UniProtKB/Swiss-Prot: August 10, 2010
Last sequence update: June 1, 2003
Last modified: March 4, 2015
This is version 73 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. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. Peptidase families
    Classification of peptidase families and list of entries
  3. 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.