CPLM-011385

Genbank Nucleotide ID

Proteasome activator complex subunit 1

Protein Synonyms/Alias

11S regulator complex subunit alpha; REG-alpha; Activator of multicatalytic protease subunit 1; Interferon gamma up-regulated I-5111 protein; IGUP I-5111; Proteasome activator 28 subunit alpha; PA28a; PA28alpha

Homo sapiens (Human)

Position	Peptide	Type	References
13	VQPEAQAKVDVFRED	ubiquitination	[1]
24	FREDLCTKTENLLGS	ubiquitination	[1]
35	LLGSYFPKKISELDA	ubiquitination	[1, 2, 3]
36	LGSYFPKKISELDAF	ubiquitination	[1]
155	FGVAVQEKVFELMTS	ubiquitination	[1]
176	GFHTQISKYFSERGD	ubiquitination	[2, 3, 4]
187	ERGDAVTKAAKQPHV	ubiquitination	[1]
190	DAVTKAAKQPHVGDY	ubiquitination	[1]
245	KKPRGETKGMIY***	ubiquitination	[1, 5]

[1] Refined preparation and use of anti-diglycine remnant (K-ε-GG) antibody enables routine quantification of 10,000s of ubiquitination sites in single proteomics experiments.
Udeshi ND, Svinkina T, Mertins P, Kuhn E, Mani DR, Qiao JW, Carr SA.
Mol Cell Proteomics. 2013 Mar;12(3):825-31. [PMID: 23266961]
[2] A proteome-wide, quantitative survey of in vivo ubiquitylation sites reveals widespread regulatory roles.
Wagner SA, Beli P, Weinert BT, Nielsen ML, Cox J, Mann M, Choudhary C.
Mol Cell Proteomics. 2011 Oct;10(10):M111.013284. [PMID: 21890473]
[3] hCKSAAP_UbSite: improved prediction of human ubiquitination sites by exploiting amino acid pattern and properties.
Chen Z, Zhou Y, Song J, Zhang Z.
Biochim Biophys Acta. 2013 Aug;1834(8):1461-7. [PMID: 23603789]
[4] Systems-wide analysis of ubiquitylation dynamics reveals a key role for PAF15 ubiquitylation in DNA-damage bypass.
Povlsen LK, Beli P, Wagner SA, Poulsen SL, Sylvestersen KB, Poulsen JW, Nielsen ML, Bekker-Jensen S, Mailand N, Choudhary C.
Nat Cell Biol. 2012 Oct;14(10):1089-98. [PMID: 23000965]
[5] Methods for quantification of in vivo changes in protein ubiquitination following proteasome and deubiquitinase inhibition.
Udeshi ND, Mani DR, Eisenhaure T, Mertins P, Jaffe JD, Clauser KR, Hacohen N, Carr SA.
Mol Cell Proteomics. 2012 May;11(5):148-59. [PMID: 22505724]

Functional Description

Implicated in immunoproteasome assembly and required for efficient antigen processing. The PA28 activator complex enhances the generation of class I binding peptides by altering the cleavage pattern of the proteasome.

3D-structure; Alternative splicing; Complete proteome; Direct protein sequencing; Polymorphism; Proteasome; Reference proteome.

UniProt (SWISSPROT/TrEMBL); GenBank; EMBL

GO:0005829; C:cytosol; TAS:Reactome.
GO:0005654; C:nucleoplasm; TAS:Reactome.
GO:0008537; C:proteasome activator complex; IEA:InterPro.
GO:0000502; C:proteasome complex; TAS:ProtInc.
GO:0031145; P:anaphase-promoting complex-dependent proteasomal ubiquitin-dependent protein catabolic process; TAS:Reactome.
GO:0002479; P:antigen processing and presentation of exogenous peptide antigen via MHC class I, TAP-dependent; TAS:Reactome.
GO:0006915; P:apoptotic process; TAS:Reactome.
GO:0006977; P:DNA damage response, signal transduction by p53 class mediator resulting in cell cycle arrest; TAS:Reactome.
GO:0000082; P:G1/S transition of mitotic cell cycle; TAS:Reactome.
GO:0010467; P:gene expression; TAS:Reactome.
GO:0016071; P:mRNA metabolic process; TAS:Reactome.
GO:0051436; P:negative regulation of ubiquitin-protein ligase activity involved in mitotic cell cycle; TAS:Reactome.
GO:0051437; P:positive regulation of ubiquitin-protein ligase activity involved in mitotic cell cycle; TAS:Reactome.
GO:0000209; P:protein polyubiquitination; TAS:Reactome.
GO:0042981; P:regulation of apoptotic process; TAS:Reactome.
GO:0006521; P:regulation of cellular amino acid metabolic process; TAS:Reactome.
GO:0044281; P:small molecule metabolic process; TAS:Reactome.
GO:0016032; P:viral reproduction; TAS:Reactome.

IPR003185; Proteasome_activ_REG_asu.
IPR009077; Proteasome_activ_REG_asu/bsu.
IPR003186; Proteasome_activ_REG_bsu.

PF02251; PA28_alpha
PF02252; PA28_beta