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Q55D66 (PSB3_DICDI) Reviewed, UniProtKB/Swiss-Prot

Last modified July 9, 2014. Version 62. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (3) | 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 type-3

EC=3.4.25.1
Gene names
Name:psmB3
ORF Names:DDB_G0269772
OrganismDictyostelium discoideum (Slime mold) [Reference proteome]
Taxonomic identifier44689 [NCBI]
Taxonomic lineageEukaryotaAmoebozoaMycetozoaDictyosteliidaDictyostelium

Protein attributes

Sequence length205 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

The proteasome is a multicatalytic proteinase complex which is characterized by its ability to cleave peptides with Arg, Phe, Tyr, Leu, and Glu adjacent to the leaving group at neutral or slightly basic pH. The proteasome has an ATP-dependent proteolytic activity By similarity.

Catalytic activity

Cleavage of peptide bonds with very broad specificity.

Subunit structure

The 26S proteasome consists of a 20S proteasome core and two 19S regulatory subunits. The 20S proteasome core is composed of 28 subunits that are arranged in four stacked rings, resulting in a barrel-shaped structure. The two end rings are each formed by seven alpha subunits, and the two central rings are each formed by seven beta subunits. The catalytic chamber with the active sites is on the inside of the barrel By similarity.

Subcellular location

Cytoplasm By similarity. Nucleus By similarity.

Sequence similarities

Belongs to the peptidase T1B family.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 205205Proteasome subunit beta type-3
PRO_0000328480

Sequences

Sequence LengthMass (Da)Tools
Q55D66 [UniParc].

Last modified May 24, 2005. Version 1.
Checksum: 934483312E7A4A16

FASTA20522,816
        10         20         30         40         50         60 
MSIMAYNGGA CIVMVGKNCV AIASDLRFGI QQQTISNDFP KVYRINDKCF VGISGLVTDA 

        70         80         90        100        110        120 
QTLYQKLVFR HNLYKLREER DMSPRVVSNL LTNMLYEKRF GPYFTEPLIC GLEGPDNTPF 

       130        140        150        160        170        180 
ISGMDLIGAS VATDDFLVVG TMTPAMYGVC ETLYKKDMNE DDLFETISQC MLASLDRDAL 

       190        200 
SGWGAIVHVI TPTQVITKKL LGRQD 

« Hide

Cross-references

Sequence databases

EMBL
GenBank
DDBJ
AAFI02000005 Genomic DNA. Translation: EAL72236.1.
RefSeqXP_646265.1. XM_641173.1.

3D structure databases

ProteinModelPortalQ55D66.
SMRQ55D66. Positions 2-205.
ModBaseSearch...
MobiDBSearch...

Protein-protein interaction databases

STRING44689.DDB_0232932.

Proteomic databases

PRIDEQ55D66.

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Genome annotation databases

EnsemblProtistsDDB0232932; DDB0232932; DDB_G0269772.
GeneID8617221.
KEGGddi:DDB_G0269772.

Organism-specific databases

dictyBaseDDB_G0269772. psmB3.

Phylogenomic databases

eggNOGCOG0638.
OMASIMAYNG.
PhylomeDBQ55D66.

Family and domain databases

Gene3D3.60.20.10. 1 hit.
InterProIPR029055. Ntn_hydrolases_N.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamPF00227. Proteasome. 1 hit.
[Graphical view]
SUPFAMSSF56235. SSF56235. 1 hit.
PROSITEPS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetSearch...

Other

PROQ55D66.

Entry information

Entry namePSB3_DICDI
AccessionPrimary (citable) accession number: Q55D66
Entry history
Integrated into UniProtKB/Swiss-Prot: April 8, 2008
Last sequence update: May 24, 2005
Last modified: July 9, 2014
This is version 62 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)

Relevant documents

SIMILARITY comments

Index of protein domains and families

Peptidase families

Classification of peptidase families and list of entries

Dictyostelium discoideum

Dictyostelium discoideum: entries, gene names and cross-references to dictyBase