Q9V0N9 · PSB2_PYRAB
- ProteinProteasome subunit beta 2
- GenepsmB2
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids207 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
Function
function
Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation.
Catalytic activity
Activity 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.
Features
Showing features for active site.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Active site | 11 | Nucleophile | ||||
Sequence: T |
GO annotations
all annotations | all molecular function | virus receptor activity | dna binding | rna binding | cytoskeletal motor activity | catalytic activity | gtpase activity | structural molecule activity | transporter activity | cytoskeletal protein binding | lipid binding | cyclase activity | antioxidant activity | oxidoreductase activity | transferase activity | hydrolase activity | lyase activity | isomerase activity | ligase activity | protein tag activity | cargo receptor activity | histone binding | protein folding chaperone | translation regulator activity | nutrient reservoir activity | receptor ligand activity | molecular transducer activity | molecular adaptor activity | toxin activity | cell adhesion mediator activity | molecular function regulator activity | virus coreceptor activity | catalytic activity, acting on a protein | catalytic activity, acting on dna | catalytic activity, acting on rna | molecular carrier activity | transcription regulator activity | general transcription initiation factor activity | molecular sensor activity | molecular sequestering activity | atp-dependent activity | other molecular function | all biological process | mitotic cell cycle | cytokinesis | cytoplasmic translation | immune system process | muscle system process | circulatory system process | renal system process | respiratory system process | carbohydrate metabolic process | generation of precursor metabolites and energy | dna replication | dna repair | dna recombination | chromatin organization | dna-templated transcription | regulation of dna-templated transcription | trna metabolic process | protein folding | protein glycosylation | amino acid metabolic process | modified amino acid metabolic process | lipid metabolic process | vitamin metabolic process | sulfur compound metabolic process | intracellular protein transport | nucleocytoplasmic transport | autophagy | inflammatory response | mitochondrion organization | cytoskeleton organization | microtubule-based movement | peroxisome organization | lysosome organization | chromosome segregation | cell adhesion | establishment or maintenance of cell polarity | programmed cell death | photosynthesis | mrna metabolic process | snrna metabolic process | vesicle-mediated transport | reproductive process | digestive system process | signaling | cell differentiation | protein catabolic process | extracellular matrix organization | regulatory ncrna-mediated gene silencing | telomere organization | cell junction organization | wound healing | ribosome biogenesis | cilium organization | anatomical structure development | cell motility | nervous system process | endocrine process | protein maturation | transmembrane transport | nucleobase-containing small molecule metabolic process | hepaticobiliary system process | membrane organization | protein-containing complex assembly | cell wall organization or biogenesis | nitrogen cycle metabolic process | protein localization to plasma membrane | defense response to other organism | detoxification | meiotic nuclear division | mitotic nuclear division | mitochondrial gene expression | carbohydrate derivative metabolic process | other biological process | all cellular component | nuclear chromosome | extracellular region | extracellular space | cell wall | nucleus | nuclear envelope | nucleoplasm | chromosome | nucleolus | mitochondrion | lysosome | endosome | vacuole | peroxisome | endoplasmic reticulum | golgi apparatus | lipid droplet | microtubule organizing center | cytosol | ribosome | cytoskeleton | plasma membrane | cilium | plastid | thylakoid | external encapsulating structure | extracellular matrix | cytoplasmic vesicle | organelle | other cellular component | |||
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Aspect | Term | |
---|---|---|
Cellular Component | cytoplasm | |
Cellular Component | proteasome core complex, beta-subunit complex | |
Molecular Function | threonine-type endopeptidase activity | |
Biological Process | proteasomal protein catabolic process |
Keywords
- Molecular function
Enzyme and pathway databases
Protein family/group databases
Names & Taxonomy
Protein names
- Recommended nameProteasome subunit beta 2
- EC number
- Alternative names
Gene names
Organism names
- Strain
- Taxonomic lineageArchaea > Euryarchaeota > Thermococci > Thermococcales > Thermococcaceae > Pyrococcus
Accessions
- Primary accessionQ9V0N9
- Secondary accessions
Proteomes
Subcellular Location
PTM/Processing
Features
Showing features for propeptide, chain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Propeptide | PRO_0000026667 | 1-10 | Removed in mature form; by autocatalysis | |||
Sequence: MLQLTEKFKG | ||||||
Chain | PRO_0000026668 | 11-207 | Proteasome subunit beta 2 | |||
Sequence: TTTVGIVCSDGVVLAADRRASLGNIVYAKNVTKIHKIDEHLAIAGAGDVGDILNLVRLLRAEAKLYYAQSGKRMSVKALATLLANMLNGARMLPYLAWFLVGGFDEKPRLYSVDMMGGITEDKYVAAGSGMEFAYSVLDSEYREDLKVREGIKIAVEAINSAIKRDVFSGDGIMVVTITEEGYRELSNSRLKAILRQ |
Keywords
- PTM
Interaction
Subunit
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.
Protein-protein interaction databases
Structure
Sequence
- Sequence statusComplete
- Sequence processingThe displayed sequence is further processed into a mature form.
- Length207
- Mass (Da)22,671
- Last updated2000-05-01 v1
- Checksum9FBD9B0519434939
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AJ248285 EMBL· GenBank· DDBJ | CAB49664.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
HE613800 EMBL· GenBank· DDBJ | CCE70146.1 EMBL· GenBank· DDBJ | Genomic DNA |