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Protein

Proteasome subunit beta type-6

Gene

PBA1

Organism
Arabidopsis thaliana (Mouse-ear cress)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

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.

Catalytic activityi

Cleavage of peptide bonds with very broad specificity.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Active sitei13NucleophileBy similarity1

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Hydrolase, Protease, Threonine protease

Enzyme and pathway databases

ReactomeiR-ATH-1236978. Cross-presentation of soluble exogenous antigens (endosomes).
R-ATH-174184. Cdc20:Phospho-APC/C mediated degradation of Cyclin A.
R-ATH-349425. Autodegradation of the E3 ubiquitin ligase COP1.
R-ATH-5632684. Hedgehog 'on' state.
R-ATH-5689603. UCH proteinases.
R-ATH-5689880. Ub-specific processing proteases.
R-ATH-68949. Orc1 removal from chromatin.
R-ATH-69017. CDK-mediated phosphorylation and removal of Cdc6.
R-ATH-983168. Antigen processing: Ubiquitination & Proteasome degradation.

Protein family/group databases

MEROPSiT01.010.

Names & Taxonomyi

Protein namesi
Recommended name:
Proteasome subunit beta type-6 (EC:3.4.25.1)
Alternative name(s):
20S proteasome beta subunit A-1
Proteasome component D
Proteasome subunit beta type-1
Gene namesi
Name:PBA1
Synonyms:PRCD
Ordered Locus Names:At4g31300
ORF Names:F8F16.120
OrganismiArabidopsis thaliana (Mouse-ear cress)
Taxonomic identifieri3702 [NCBI]
Taxonomic lineageiEukaryotaViridiplantaeStreptophytaEmbryophytaTracheophytaSpermatophytaMagnoliophytaeudicotyledonsGunneridaePentapetalaerosidsmalvidsBrassicalesBrassicaceaeCamelineaeArabidopsis
Proteomesi
  • UP000006548 Componenti: Chromosome 4

Organism-specific databases

TAIRiAT4G31300.

Subcellular locationi

  • Cytoplasm PROSITE-ProRule annotation
  • Nucleus By similarity

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm, Nucleus, Proteasome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
PropeptideiPRO_00000428281 – 12Removed in mature formAdd BLAST12
ChainiPRO_000004282913 – 233Proteasome subunit beta type-6Add BLAST221

Keywords - PTMi

Zymogen

Proteomic databases

PaxDbiQ8LD27.
PRIDEiQ8LD27.

PTM databases

iPTMnetiQ8LD27.

Expressioni

Gene expression databases

ExpressionAtlasiQ8LD27. baseline and differential.
GenevisibleiQ8LD27. AT.

Interactioni

Subunit structurei

Component of the 20S core complex of the 26S proteasome. The 26S proteasome is composed of a core protease (CP), known as the 20S proteasome, capped at one or both ends by the 19S regulatory particle (RP/PA700). 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.3 Publications

Protein-protein interaction databases

BioGridi14543. 3 interactors.
IntActiQ8LD27. 2 interactors.
STRINGi3702.AT4G31300.2.

Structurei

3D structure databases

ProteinModelPortaliQ8LD27.
SMRiQ8LD27.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1B family.PROSITE-ProRule annotation

Phylogenomic databases

eggNOGiKOG0174. Eukaryota.
ENOG410XS23. LUCA.
HOGENOMiHOG000091079.
InParanoidiQ8LD27.
KOiK02738.
PhylomeDBiQ8LD27.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
InterProiIPR029055. Ntn_hydrolases_N.
IPR000243. Pept_T1A_subB.
IPR016050. Proteasome_bsu_CS.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamiPF00227. Proteasome. 1 hit.
[Graphical view]
PRINTSiPR00141. PROTEASOME.
SUPFAMiSSF56235. SSF56235. 1 hit.
PROSITEiPS00854. PROTEASOME_BETA_1. 1 hit.
PS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Sequence processingi: The displayed sequence is further processed into a mature form.

This entry describes 1 isoform i produced by alternative splicing. AlignAdd to basket

Note: A number of isoforms are produced. According to EST sequences.
Isoform 1 (identifier: Q8LD27-1) [UniParc]FASTAAdd to basket

This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry.

« Hide

        10         20         30         40         50
MDLNLDAPHS MGTTIIGVTY NGGVVLGADS RTSTGMYVAN RASDKITQLT
60 70 80 90 100
DNVYVCRSGS AADSQVVSDY VRYFLHQHTI QHGQPATVKV SANLIRMLAY
110 120 130 140 150
NNKNMLQTGL IVGGWDKYEG GKIYGIPLGG TVVEQPFAIG GSGSSYLYGF
160 170 180 190 200
FDQAWKDNMT KEEAEQLVVK AVSLAIARDG ASGGVVRTVI INSEGVTRNF
210 220 230
YPGDKLQLWH EELEPQNSLL DILNAAGPEP MAM
Length:233
Mass (Da):25,151
Last modified:November 22, 2005 - v2
Checksum:iD9DBB0CBD42623AB
GO

Sequence cautioni

The sequence AAM64316 differs from that shown. Reason: Erroneous initiation. Translation N-terminally extended.Curated

Experimental Info

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Sequence conflicti73Y → H in AAM64316 (Ref. 6) Curated1

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y13694 mRNA. Translation: CAA74028.1.
AF043529 mRNA. Translation: AAC32065.1.
AL021633 Genomic DNA. Translation: CAA16533.1.
AL161578 Genomic DNA. Translation: CAB79848.1.
CP002687 Genomic DNA. Translation: AEE85887.1.
CP002687 Genomic DNA. Translation: AEE85889.1.
AY052354 mRNA. Translation: AAK96545.1.
AY058240 mRNA. Translation: AAL15414.1.
AY086241 mRNA. Translation: AAM64316.1. Different initiation.
PIRiT04497.
RefSeqiNP_001190879.1. NM_001203950.1. [Q8LD27-1]
NP_194858.1. NM_119279.5. [Q8LD27-1]
UniGeneiAt.24496.

Genome annotation databases

EnsemblPlantsiAT4G31300.1; AT4G31300.1; AT4G31300. [Q8LD27-1]
AT4G31300.3; AT4G31300.3; AT4G31300. [Q8LD27-1]
GeneIDi829257.
GrameneiAT4G31300.1; AT4G31300.1; AT4G31300.
AT4G31300.3; AT4G31300.3; AT4G31300.
KEGGiath:AT4G31300.

Keywords - Coding sequence diversityi

Alternative splicing

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
Y13694 mRNA. Translation: CAA74028.1.
AF043529 mRNA. Translation: AAC32065.1.
AL021633 Genomic DNA. Translation: CAA16533.1.
AL161578 Genomic DNA. Translation: CAB79848.1.
CP002687 Genomic DNA. Translation: AEE85887.1.
CP002687 Genomic DNA. Translation: AEE85889.1.
AY052354 mRNA. Translation: AAK96545.1.
AY058240 mRNA. Translation: AAL15414.1.
AY086241 mRNA. Translation: AAM64316.1. Different initiation.
PIRiT04497.
RefSeqiNP_001190879.1. NM_001203950.1. [Q8LD27-1]
NP_194858.1. NM_119279.5. [Q8LD27-1]
UniGeneiAt.24496.

3D structure databases

ProteinModelPortaliQ8LD27.
SMRiQ8LD27.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

BioGridi14543. 3 interactors.
IntActiQ8LD27. 2 interactors.
STRINGi3702.AT4G31300.2.

Protein family/group databases

MEROPSiT01.010.

PTM databases

iPTMnetiQ8LD27.

Proteomic databases

PaxDbiQ8LD27.
PRIDEiQ8LD27.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblPlantsiAT4G31300.1; AT4G31300.1; AT4G31300. [Q8LD27-1]
AT4G31300.3; AT4G31300.3; AT4G31300. [Q8LD27-1]
GeneIDi829257.
GrameneiAT4G31300.1; AT4G31300.1; AT4G31300.
AT4G31300.3; AT4G31300.3; AT4G31300.
KEGGiath:AT4G31300.

Organism-specific databases

TAIRiAT4G31300.

Phylogenomic databases

eggNOGiKOG0174. Eukaryota.
ENOG410XS23. LUCA.
HOGENOMiHOG000091079.
InParanoidiQ8LD27.
KOiK02738.
PhylomeDBiQ8LD27.

Enzyme and pathway databases

ReactomeiR-ATH-1236978. Cross-presentation of soluble exogenous antigens (endosomes).
R-ATH-174184. Cdc20:Phospho-APC/C mediated degradation of Cyclin A.
R-ATH-349425. Autodegradation of the E3 ubiquitin ligase COP1.
R-ATH-5632684. Hedgehog 'on' state.
R-ATH-5689603. UCH proteinases.
R-ATH-5689880. Ub-specific processing proteases.
R-ATH-68949. Orc1 removal from chromatin.
R-ATH-69017. CDK-mediated phosphorylation and removal of Cdc6.
R-ATH-983168. Antigen processing: Ubiquitination & Proteasome degradation.

Miscellaneous databases

PROiQ8LD27.

Gene expression databases

ExpressionAtlasiQ8LD27. baseline and differential.
GenevisibleiQ8LD27. AT.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
InterProiIPR029055. Ntn_hydrolases_N.
IPR000243. Pept_T1A_subB.
IPR016050. Proteasome_bsu_CS.
IPR001353. Proteasome_sua/b.
IPR023333. Proteasome_suB-type.
[Graphical view]
PfamiPF00227. Proteasome. 1 hit.
[Graphical view]
PRINTSiPR00141. PROTEASOME.
SUPFAMiSSF56235. SSF56235. 1 hit.
PROSITEiPS00854. PROTEASOME_BETA_1. 1 hit.
PS51476. PROTEASOME_BETA_2. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiPSB6_ARATH
AccessioniPrimary (citable) accession number: Q8LD27
Secondary accession number(s): O23716
Entry historyi
Integrated into UniProtKB/Swiss-Prot: November 22, 2005
Last sequence update: November 22, 2005
Last modified: November 30, 2016
This is version 108 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programPlant Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Arabidopsis thaliana
    Arabidopsis thaliana: entries and gene names
  2. Peptidase families
    Classification of peptidase families and list of entries
  3. SIMILARITY comments
    Index of protein domains and families

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 one 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.