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Protein

Proteasome subunit alpha type-1

Gene

Psma1

Organism
Rattus norvegicus (Rat)
Status
Reviewed-Annotation score: Annotation score: 4 out of 5-Experimental evidence at protein leveli

Functioni

Component of the 20S core proteasome complex involved in the proteolytic degradation of most intracellular proteins. This complex plays numerous essential roles within the cell by associating with different regulatory particles. Associated with two 19S regulatory particles, forms the 26S proteasome and thus participates in the ATP-dependent degradation of ubiquitinated proteins. The 26S proteasome plays a key role in the maintenance of protein homeostasis by removing misfolded or damaged proteins that could impair cellular functions, and by removing proteins whose functions are no longer required. Associated with the PA200 or PA28, the 20S proteasome mediates ubiquitin-independent protein degradation. This type of proteolysis is required in several pathways including spermatogenesis (20S-PA200 complex) or generation of a subset of MHC class I-presented antigenic peptides (20S-PA28 complex).By similarity

Catalytic activityi

Cleavage of peptide bonds with very broad specificity.PROSITE-ProRule annotation

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionHydrolase, Protease, Threonine protease
Biological processImmunity

Enzyme and pathway databases

ReactomeiR-RNO-1169091. Activation of NF-kappaB in B cells.
R-RNO-1234176. Oxygen-dependent proline hydroxylation of Hypoxia-inducible Factor Alpha.
R-RNO-1236978. Cross-presentation of soluble exogenous antigens (endosomes).
R-RNO-174084. Autodegradation of Cdh1 by Cdh1:APC/C.
R-RNO-174113. SCF-beta-TrCP mediated degradation of Emi1.
R-RNO-174154. APC/C:Cdc20 mediated degradation of Securin.
R-RNO-174178. APC/C:Cdh1 mediated degradation of Cdc20 and other APC/C:Cdh1 targeted proteins in late mitosis/early G1.
R-RNO-174184. Cdc20:Phospho-APC/C mediated degradation of Cyclin A.
R-RNO-187577. SCF(Skp2)-mediated degradation of p27/p21.
R-RNO-195253. Degradation of beta-catenin by the destruction complex.
R-RNO-202424. Downstream TCR signaling.
R-RNO-2467813. Separation of Sister Chromatids.
R-RNO-2871837. FCERI mediated NF-kB activation.
R-RNO-349425. Autodegradation of the E3 ubiquitin ligase COP1.
R-RNO-350562. Regulation of ornithine decarboxylase (ODC).
R-RNO-382556. ABC-family proteins mediated transport.
R-RNO-446652. Interleukin-1 signaling.
R-RNO-450408. AUF1 (hnRNP D0) binds and destabilizes mRNA.
R-RNO-4608870. Asymmetric localization of PCP proteins.
R-RNO-4641257. Degradation of AXIN.
R-RNO-4641258. Degradation of DVL.
R-RNO-5358346. Hedgehog ligand biogenesis.
R-RNO-5607761. Dectin-1 mediated noncanonical NF-kB signaling.
R-RNO-5607764. CLEC7A (Dectin-1) signaling.
R-RNO-5610780. Degradation of GLI1 by the proteasome.
R-RNO-5610785. GLI3 is processed to GLI3R by the proteasome.
R-RNO-5632684. Hedgehog 'on' state.
R-RNO-5658442. Regulation of RAS by GAPs.
R-RNO-5668541. TNFR2 non-canonical NF-kB pathway.
R-RNO-5676590. NIK-->noncanonical NF-kB signaling.
R-RNO-5687128. MAPK6/MAPK4 signaling.
R-RNO-5689603. UCH proteinases.
R-RNO-5689880. Ub-specific processing proteases.
R-RNO-68827. CDT1 association with the CDC6:ORC:origin complex.
R-RNO-68949. Orc1 removal from chromatin.
R-RNO-69017. CDK-mediated phosphorylation and removal of Cdc6.
R-RNO-69229. Ubiquitin-dependent degradation of Cyclin D1.
R-RNO-69481. G2/M Checkpoints.
R-RNO-69601. Ubiquitin Mediated Degradation of Phosphorylated Cdc25A.
R-RNO-8852276. The role of GTSE1 in G2/M progression after G2 checkpoint.
R-RNO-8854050. FBXL7 down-regulates AURKA during mitotic entry and in early mitosis.
R-RNO-8941858. Regulation of RUNX3 expression and activity.
R-RNO-983168. Antigen processing: Ubiquitination & Proteasome degradation.

Names & Taxonomyi

Protein namesi
Recommended name:
Proteasome subunit alpha type-1 (EC:3.4.25.1By similarity)
Alternative name(s):
Macropain subunit C2
Multicatalytic endopeptidase complex subunit C2
Proteasome component C2
Proteasome nu chain
Gene namesi
Name:Psma1
OrganismiRattus norvegicus (Rat)
Taxonomic identifieri10116 [NCBI]
Taxonomic lineageiEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresGliresRodentiaMyomorphaMuroideaMuridaeMurinaeRattus
Proteomesi
  • UP000002494 Componenti: Chromosome 1

Organism-specific databases

RGDi61841. Psma1.

Subcellular locationi

  • Cytoplasm By similarity
  • Nucleus By similarity

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm, Nucleus, Proteasome

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001240641 – 263Proteasome subunit alpha type-1Add BLAST263

Amino acid modifications

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Modified residuei1N-acetylmethionine1 Publication1
Modified residuei110Phosphoserine; alternateBy similarity1
Glycosylationi110O-linked (GlcNAc) serine; alternateBy similarity1
Cross-linki115Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity
Modified residuei177PhosphoserineBy similarity1
Cross-linki208Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin)By similarity

Post-translational modificationi

Proteolytically cleaved from a C-terminal extension in the course of the conversion of the proteasome from its latent form into its active form.

Keywords - PTMi

Acetylation, Glycoprotein, Isopeptide bond, Phosphoprotein, Ubl conjugation

Proteomic databases

PaxDbiP18420.
PRIDEiP18420.

2D gel databases

World-2DPAGEi0004:P18420.

Expressioni

Tissue specificityi

Ubiquitous.

Gene expression databases

BgeeiENSRNOG00000011745.
GenevisibleiP18420. RN.

Interactioni

Subunit structurei

The 26S proteasome consists of a 20S proteasome core and two 19S regulatory subunits. The 20S proteasome core is a barrel-shaped complex made of 28 subunits that are arranged in four stacked rings. The two outer rings are each formed by seven alpha subunits, and the two inner rings are formed by seven beta subunits. The proteolytic activity is exerted by three beta-subunits PSMB5, PSMB6 and PSMB7. Interacts with NOTCH3.By similarity

Protein-protein interaction databases

BioGridi248289. 1 interactor.
IntActiP18420. 1 interactor.
STRINGi10116.ENSRNOP00000015946.

Structurei

3D structure databases

ProteinModelPortaliP18420.
SMRiP18420.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the peptidase T1A family.PROSITE-ProRule annotation

Phylogenomic databases

eggNOGiKOG0863. Eukaryota.
COG0638. LUCA.
GeneTreeiENSGT00550000074855.
HOGENOMiHOG000091080.
HOVERGENiHBG105373.
InParanoidiP18420.
KOiK02725.
OMAiFMKQQCL.
OrthoDBiEOG091G0DNK.
PhylomeDBiP18420.
TreeFamiTF106206.

Family and domain databases

Gene3Di3.60.20.10. 1 hit.
InterProiView protein in InterPro
IPR029055. Ntn_hydrolases_N.
IPR023332. Proteasome_alpha-type.
IPR000426. Proteasome_asu_N.
IPR001353. Proteasome_sua/b.
PfamiView protein in Pfam
PF00227. Proteasome. 1 hit.
PF10584. Proteasome_A_N. 1 hit.
SMARTiView protein in SMART
SM00948. Proteasome_A_N. 1 hit.
SUPFAMiSSF56235. SSF56235. 1 hit.
PROSITEiView protein in PROSITE
PS00388. PROTEASOME_ALPHA_1. 1 hit.
PS51475. PROTEASOME_ALPHA_2. 1 hit.

Sequencei

Sequence statusi: Complete.

P18420-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MFRNQYDNDV TVWSPQGRIH QIEYAMEAVK QGSATVGLKS KTHAVLVALK
60 70 80 90 100
RAQSELAAHQ KKILHVDNHI GISIAGLTAD ARLLCNFMRQ ECLDSRFVFD
110 120 130 140 150
RPLPVSRLVS LIGSKTQIPT QRYGRRPYGV GLLIAGYDDM GPHVFQTCPS
160 170 180 190 200
ANYFDCRAMS IGARSQSART YLERHMSEFM QCNLDELVKH GLRALRETLP
210 220 230 240 250
AEQDLTTKNV SIGIVGKDLE FTIYDDDDVS PFLDGLEERP QRKAQPSQAA
260
DEPAEKADEP MEH
Length:263
Mass (Da):29,518
Last modified:February 1, 1991 - v2
Checksum:i68660696B43A4051
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
M29859 mRNA. Translation: AAA41943.1.
D90265 mRNA. Translation: BAA14312.1.
BC062233 mRNA. Translation: AAH62233.1.
PIRiA32968. SNRTC2.
RefSeqiNP_058974.1. NM_017278.1.
UniGeneiRn.2668.

Genome annotation databases

EnsembliENSRNOT00000015946; ENSRNOP00000015946; ENSRNOG00000011745.
GeneIDi29668.
KEGGirno:29668.
UCSCiRGD:61841. rat.

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.

Entry informationi

Entry nameiPSA1_RAT
AccessioniPrimary (citable) accession number: P18420
Entry historyiIntegrated into UniProtKB/Swiss-Prot: November 1, 1990
Last sequence update: February 1, 1991
Last modified: June 7, 2017
This is version 149 of the entry and version 2 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Direct protein sequencing, Reference proteome

Documents

  1. Peptidase families
    Classification of peptidase families and list of entries
  2. SIMILARITY comments
    Index of protein domains and families