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O24733 (PSA_THEK1) Reviewed, UniProtKB/Swiss-Prot

Last modified June 11, 2014. Version 77. 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 alpha

EC=3.4.25.1
Alternative name(s):
20S proteasome alpha subunit
Proteasome core protein PsmA
Gene names
Name:psmA
OrganismThermococcus sp. (strain KS-1)
Taxonomic identifier79679 [NCBI]
Taxonomic lineageArchaeaEuryarchaeotaThermococciThermococcalesThermococcaceaeThermococcus

Protein attributes

Sequence length260 AA.
Sequence statusComplete.
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_00289

Catalytic activity

Cleavage of peptide bonds with very broad specificity. HAMAP-Rule MF_00289

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_00289

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_00289.

Sequence similarities

Belongs to the peptidase T1A family.

Ontologies

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 260260Proteasome subunit alpha HAMAP-Rule MF_00289
PRO_0000124190

Sequences

Sequence LengthMass (Da)Tools
O24733 [UniParc].

Last modified January 1, 1998. Version 1.
Checksum: 76CAB30E3E6E7D03

FASTA26029,211
        10         20         30         40         50         60 
MAFVPPQAGY DRAITVFSPD GRLFQVNYAR EAVKRGATAV GVKWKDGVVL AVEKRITSKL 

        70         80         90        100        110        120 
IEPSSYEKIF LIDDHIAAAP SGIIADARVL VDRARLEAQI YRLTYGEPVP LTVLVKKICD 

       130        140        150        160        170        180 
LKQAHTQYGG VRPFGAALLM AGVNEKPELF ETDPSGAYFE WKAVAIGSGR NTAMAIFEEH 

       190        200        210        220        230        240 
YRDDIGKDDA IKLAILALAK TLEEPTAEGI EVAYITMDEK RWKKLPREEL EKYLNEILQE 

       250        260 
VKEEEVEEKQ EDYSELDQNY 

« Hide

References

[1]Yoshida T., Yohda M., Ohta T., Iida T., Maruyama T., Kagawa Y.
Submitted (FEB-1997) to the EMBL/GenBank/DDBJ databases
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA].

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AB001084 Genomic DNA. Translation: BAA22211.1.
PIRT43887.

3D structure databases

ProteinModelPortalO24733.
SMRO24733. Positions 6-239.
ModBaseSearch...
MobiDBSearch...

Protein family/group databases

MEROPST01.973.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Family and domain databases

Gene3D3.60.20.10. 1 hit.
HAMAPMF_00289_A. Proteasome_A_A.
InterProIPR029055. Ntn_hydrolases_N.
IPR019982. Proteasome_asu_arc.
IPR000426. Proteasome_asu_N.
IPR023332. Proteasome_suA-type.
IPR001353. Proteasome_sua/b.
[Graphical view]
PfamPF00227. Proteasome. 1 hit.
PF10584. Proteasome_A_N. 1 hit.
[Graphical view]
SMARTSM00948. Proteasome_A_N. 1 hit.
[Graphical view]
SUPFAMSSF56235. SSF56235. 1 hit.
TIGRFAMsTIGR03633. arc_protsome_A. 1 hit.
PROSITEPS00388. PROTEASOME_ALPHA_1. 1 hit.
PS51475. PROTEASOME_ALPHA_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePSA_THEK1
AccessionPrimary (citable) accession number: O24733
Entry history
Integrated into UniProtKB/Swiss-Prot: December 8, 2000
Last sequence update: January 1, 1998
Last modified: June 11, 2014
This is version 77 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